FORM 10-K
                    SECURITIES AND EXCHANGE COMMISSION
                         WASHINGTON, D.C.  20549
(Mark One)

[x]    Annual  report  pursuant to Section 13 or 15(d)  of  the  Securities
       Exchange Act of 1934 [Fee Required]

For the fiscal year ended December 31, 2001

                                    OR

[ ]    Transition  report pursuant to Section 13 or 15(d) of the Securities
       Exchange Act of 1934 [No Fee Required]

For the transition period from                      to

Commission File Number 33-47668-02

         Southwest Royalties Institutional Income Fund XI-B, L.P.
                (Exact name of registrant as specified in
                    its limited partnership agreement)

Delaware                                                     75-2427289
(State or other jurisdiction                             (I.R.S. Employer
of incorporation or organization)                       Identification No.)

407 N. Big Spring, Suite 300, Midland, Texas                 79701
(Address of principal executive office)                   (Zip Code)

Registrant's telephone number, including area code   (915) 686-9927

       Securities registered pursuant to Section 12(b) of the Act:

                                   None

       Securities registered pursuant to Section 12(g) of the Act:

                      limited partnership interests

Indicate by check mark whether registrant (1) has filed reports required to
be  filed  by  Section 13 or 15(d) of the Securities Exchange Act  of  1934
during  the  preceding  12  months (or for such  shorter  period  that  the
registrant was required to file such reports), and (2) has been subject  to
such filing requirements for the past 90 days:     Yes   x    No

Indicate by check mark if disclosure of delinquent filers pursuant to  Item
405  of  Regulation S-K (229.405 of this chapter) is not contained  herein,
and  will  not  be  contained,  to the best of registrant's  knowledge,  in
definitive  proxy or information statements incorporated  by  reference  in
Part III of this Form 10-K or any amendment to this Form 10-K.     [x]

The  registrant's  outstanding  securities  consist  of  Units  of  limited
partnership  interests for which there exists no established public  market
from which to base a calculation of aggregate market value.

The  total  number of pages contained in this report is 38.   There  is  no
exhibit index.


                            Table of Contents

Item                                                                   Page

                                  Part I

 1.  Business                                                            3

 2.  Properties                                                          6

 3.  Legal Proceedings                                                   7

 4.  Submission of Matters to a Vote of Security Holders                 7

                                 Part II

 5.  Market for Registrant's Common Equity and Related
     Stockholder Matters                                                 8

 6.  Selected Financial Data                                             9

 7.  Management's Discussion and Analysis of
     Financial Condition and Results of Operations                      10

 8.  Financial Statements and Supplementary Data                        18

 9.  Changes in and Disagreements with Accountants
     on Accounting and Financial Disclosure                             34

                                 Part III

10.  Directors and Executive Officers of the Registrant                 35

11.  Executive Compensation                                             36

12.  Security Ownership of Certain Beneficial Owners and
     Management                                                         36

13.  Certain Relationships and Related Transactions                     37

                                 Part IV

14.  Exhibits, Financial Statement Schedules, and Reports
     on Form 8-K                                                        37

     Signatures                                                         38


                                  Part I

Item 1.   Business

General
Southwest Royalties Institutional Income Fund XI-B, L.P. (the "Partnership"
or  "Registrant") was organized as a Delaware limited partnership on August
31,  1993.  The offering of limited partnership interests began October 25,
1993,  as  part  of  a shelf offering registered under the  name  Southwest
Royalties   Institutional   1992-93  Income   Program.    Minimum   capital
requirements for the Partnership were met on December 8, 1993 and concluded
August 20, 1994.  The Partnership has no subsidiaries.

As  of  December  31,  1996,  the Partnership  had  utilized  approximately
$2,008,600 of limited partner capital contributions to acquire interests in
oil  and  gas properties.  All excess capital, $89,489, and the  associated
organization costs of $3,132, has been distributed to the limited  partners
in proportion to their capital contributions as a return of capital.

The  principal executive offices of the Partnership are located at  407  N.
Big Spring, Suite 300, Midland, Texas, 79701.  The Managing General Partner
of  the  Partnership,  Southwest Royalties,  Inc.  (the  "Managing  General
Partner")   and  its  staff  of  89  individuals,  together  with   certain
independent  consultants  used  on an "as needed"  basis,  perform  various
services on behalf of the Partnership, including the selection of  oil  and
gas properties and the marketing of production from such properties.  H. H.
Wommack,  III,  a  stockholder, director, President and  Treasurer  of  the
Managing  General Partner, is also a general partner.  The Partnership  has
no employees.

Principal Products, Marketing and Distribution
The  Partnership  has acquired and holds royalty interest  and  net  profit
interests  in oil and gas properties located in New Mexico and Texas.   All
activities  of  the  Partnership are confined  to  the  continental  United
States.   All  oil  and  gas  produced from these  properties  is  sold  to
unrelated third parties in the oil and gas business.

The  revenues  generated from the Partnership's oil and gas activities  are
dependent  upon  the  current market for oil and gas.  With  some  periodic
exceptions,  since the early 1980's, there has been a worldwide  oversupply
of  oil; therefore, market prices have declined significantly.  The  prices
received  by  the  Partnership for its oil and gas production  depend  upon
numerous  factors beyond the Partnership's control, including  competition,
economic,  political  and regulatory developments  and  competitive  energy
sources,  and make it particularly difficult to estimate future prices  for
oil and natural gas.


For  nearly nine months, despite the fears of a global recession, crude oil
prices  held steady between $26 and $28 per barrel due in part to a  series
of  OPEC  and  non-OPEC production cuts.  Then, following what  has  become
known  simply  as  "9-11",  crude prices plunged  immediately  to  $22  and
gradually  fell  to below $18 per barrel.  Slower demand  across  the  U.S.
caused by the threat of recession and warmer than expected weather also led
to  declining prices in the latter half of 2001.  However, the  oil  cartel
and other non-member countries agreed for the fourth time since February to
curb  output in an effort to stabilize prices.  Crude oil contracts trading
on the NYMEX closed the year at approximately $20 per barrel.

Spot  prices in 2001 climbed to their highest levels ever, with the  yearly
average  price  nationwide reaching $4.14/MMBtu, up  9.77%  from  the  2000
average  of $3.77/MMBtu.  Prices reached their zenith in the first  quarter
of  2001 before beginning a steady decline throughout the remainder of  the
year.   The  terrorist  attacks  of  September  11  knocked  the  New  York
Mercantile Exchange out of the market for several days and shook  the  spot
marketplace into a maintenance mode.  As companies measured the  impact  of
the  attacks on the U.S. economy, spot prices deteriorated further.  In the
fourth  quarter,  prices  bottomed out for the year  with  the  three-month
average  falling to $2.31/MMBtu.  As for 2002, record-high  storage  levels
and  the  expectation of a flat economy through the first half of the  year
are  leading  industry  experts to predict prices to  average  $2.05/MMBtu,
remaining above the $2.00 per MMBtu level for a 5th consecutive year.

Following  is a table of the ratios of revenues received from oil  and  gas
production for the last three years:

                                  Oil          Gas
                    2001          37%          63%
                    2000          39%          61%
                    1999          46%          54%

As  the  table  indicates, the Partnership's revenue is primarily  its  oil
production.   The  Partnership revenues will be highly dependent  upon  the
future prices and demands for oil and gas.

Seasonality of Business
Although the demand for natural gas is highly seasonal, with higher  demand
in  the colder winter months and in very hot summer months, the Partnership
has  been able to sell all of its natural gas, either through contracts  in
place or on the spot market at the then prevailing spot market price.  As a
result,  the  volume sold by the Partnership is not expected  to  fluctuate
materially with the change of season.

Customer Dependence
No  material portion of the Partnership's business is dependent on a single
purchaser,  or a very few purchasers, where the loss of one  would  have  a
material adverse impact on the Partnership.  Three purchasers accounted for
93%  of  the Partnership's total oil and gas production during  2001:   Sid
Richardson  Energy Services for 52%, Navajo Refining Company  for  31%  and
Duke  Energy Field Services for 10%. Three purchasers accounted for 91%  of
the Partnership's total oil and gas production during 2000:  Sid Richardson
Gasoline Co. for 44%, Navajo Refining Company, Inc. for 37% and Phillips 66
Natural  Gas  for  10%.   Three  purchasers  accounted  for  84%   of   the
Partnership's  total oil and gas production during 1999:   Navajo  Refining
Company  for 40%, Sid Richardson Gasoline Co. for 33% and Phillips  66  for
11%.

All  purchasers of the Partnership's oil and gas production  are  unrelated
third  parties.   In the event any of these purchasers were to  discontinue
purchasing  the  Partnership's  production, the  Managing  General  Partner
believes that a substitute purchaser or purchasers could be located without
undue  delay.   No  other purchaser accounted for an  amount  equal  to  or
greater than 10% of the Partnership's sales of oil and gas production.


Competition
Because  the  Partnership has utilized all of its funds available  for  the
acquisition  of interests in producing oil and gas properties,  it  is  not
subject  to  competition from other oil and gas property  purchasers.   See
Item 2, Properties.

Factors  that  may  adversely  affect the  Partnership  include  delays  in
completing  arrangements  for  the sale of production,  availability  of  a
market for production, rising operating costs of producing oil and gas  and
complying  with  applicable  water  and  air  pollution  control  statutes,
increasing  costs  and  difficulties of transportation,  and  marketing  of
competitive  fuels.   Moreover, domestic oil  and  gas  must  compete  with
imported oil and gas and with coal, atomic energy, hydroelectric power  and
other forms of energy.

Regulation

Oil  and Gas Production - The production and sale of oil and gas is subject
to  federal and state governmental regulation in several respects, such  as
existing price controls on natural gas and possible price controls on crude
oil,  regulation of oil and gas production by state and local  governmental
agencies, pollution and environmental controls and various other direct and
indirect   regulation.    Many  jurisdictions  have  periodically   imposed
limitations on oil and gas production by restricting the rate of  flow  for
oil  and  gas wells below their actual capacity to produce and by  imposing
acreage limitations for the drilling of wells.  The federal government  has
the  power  to  permit increases in the amount of oil imported  from  other
countries and to impose pollution control measures.  Various aspects of the
Partnership's  oil  and gas activities will be regulated by  administrative
agencies under statutory provisions of the states where such activities are
conducted  and by certain agencies of the federal government for operations
on  Federal leases.  Moreover, certain prices at which the Partnership  may
sell  its  natural gas production are controlled by the Natural Gas  Policy
Act  of  1978,  the  Natural Gas Wellhead Decontrol Act  of  1989  and  the
regulations promulgated by the Federal Energy Regulatory Commission.

Environmental - The Partnership's oil and gas activities will be subject to
extensive  federal,  state  and local laws and  regulations  governing  the
generation,  storage, handling, emission, transportation and  discharge  of
materials into the environment.  Governmental authorities have the power to
enforce compliance with their regulations, and violations carry substantial
penalties.   This  regulatory burden on the oil and gas industry  increases
its cost of doing business and consequently affects its profitability.  The
Managing  General  Partner  is  unable to  predict  what,  if  any,  effect
compliance will have on the Partnership.

Industry  Regulations  and  Guidelines - Certain industry  regulations  and
guidelines  apply to the registration, qualification and operation  of  oil
and  gas programs in the form of limited partnerships.  The Partnership  is
subject  to  these  guidelines  which regulate  and  restrict  transactions
between  the Managing General Partner and the Partnership.  The Partnership
complies  with these guidelines and the Managing General Partner  does  not
anticipate that continued compliance will have a material adverse effect on
Partnership operations.

Partnership Employees
The  Partnership has no employees; however the Managing General Partner has
a  staff of geologists, engineers, accountants, landmen and clerical  staff
who  engage in Partnership activities and operations and perform additional
services  for  the  Partnership as needed.  In  addition  to  the  Managing
General  Partner's  staff, the Partnership engages independent  consultants
such  as petroleum engineers and geologists as needed.  As of December  31,
2001  there  were 89 individuals directly employed by the Managing  General
Partner in various capacities.


Item 2.   Properties

In  determining whether an interest in a particular producing property  was
to  be  acquired, the Managing General Partner considered such criteria  as
estimated  oil  and  gas reserves, estimated cash flow  from  the  sale  of
production,  present  and  future prices of oil  and  gas,  the  extent  of
undeveloped  and  unproved reserves, the potential for secondary,  tertiary
and other enhanced recovery projects and the availability of markets.

As  of December 31, 2001, the Partnership possessed an interest in oil  and
gas  properties  located  in Eddy County of New  Mexico;  Andrews,  Dawson,
Howard,  Midland, Reeves, Schleicher, Upton, Ward and Winkler  Counties  of
Texas.   These  properties consist of various interests  in  73  wells  and
units.

Due  to  the  Partnership's  objective of  maintaining  current  operations
without engaging in the drilling of any developmental or exploratory wells,
or  additional acquisitions of producing properties, there has not been any
significant changes in properties during 2001, 2000 and 1999.

During 2001, three leases were sold for approximately $27,600.  There  were
no  property  sales  during 2000.  During 1999,  one  lease  was  sold  for
approximately $1,600.

In  compliance  with  the Partnership Agreement, if the Partnership  should
purchase  a  producing  property from the Managing  General  Partner,  such
purchase price would be prior cost, adjusted for any intervening operation.
If  such  adjusted cost was greater than fair market value, or if  specific
cost  was unable to be determined, such purchase price would be fair market
value as determined by an independent reservoir engineer.

Significant Properties
The  following  table  reflects the significant  properties  in  which  the
Partnership has an interest:

                       Date
                    Purchased           No. of          Proved Reserves*
Name and Location  and Interest         Wells        Oil (bbls)  Gas (mcf)
- -----------------  ------------         ------       ---------   ---------
Custer & Wright       11/94 at           27         17,000        309,000
Winkler County,       1% to 40%
Texas                 net profits
                      interests

Elizabeth Windham #2  10/94 at            1              -         66,000
Upton County,         12% net
Texas                 profits
                      interests

Michael Dingman       9/94 at            34          8,000         57,000
Midland, Reeves,      .5% to 50%
Dawson, Schleicher,   net profits
Winkler Ward,         interests
Andrews, Counties,
Texas; Eddy County,
New Mexico

*Ryder  Scott  Petroleum Engineers prepared the reserve and  present  value
data for the Partnership's existing properties as of January 1, 2002.   The
reserve  estimates were made in accordance with guidelines  established  by
the  Securities  and  Exchange  Commission  pursuant  to  Rule  4-10(a)  of
Regulation  S-X.   Such guidelines require oil and gas reserve  reports  be
prepared  under  existing  economic  and  operating  conditions   with   no
provisions   for   price   and  cost  escalation  except   by   contractual
arrangements.


Oil  price  adjustments were made in the individual evaluations to  reflect
oil quality, gathering and transportation costs. The results of the reserve
report as of January 1, 2002 are an average price of $17.10 per barrel.

Gas  price  adjustments were made in the individual evaluations to  reflect
BTU  content,  gathering and transportation costs and  gas  processing  and
shrinkage.  The results of the reserve report as of January 1, 2002 are  an
average price of $2.22 per Mcf.

As  also discussed in Part II, Item 7, Management's Discussion and Analysis
of  Financial Condition and Results of Operations, oil and gas prices  were
subject to frequent changes in 2001.

The  evaluation  of  oil and gas properties is not  an  exact  science  and
inevitably involves a significant degree of uncertainty, particularly  with
respect to the quantity of oil or gas that any given property is capable of
producing.   Estimates  of  oil and gas reserves  are  based  on  available
geological and engineering data, the extent and quality of which  may  vary
in  each  case  and,  in  certain instances, may prove  to  be  inaccurate.
Consequently,  properties may be depleted more rapidly than the  geological
and engineering data have indicated.

Unanticipated  depletion, if it occurs, will result in lower reserves  than
previously  estimated; thus an ultimately lower return for the Partnership.
Basic  changes in past reserve estimates occur annually.  As  new  data  is
gathered  during the subsequent year, the engineer must revise his  earlier
estimates.  A year of new information, which is pertinent to the estimation
of  future  recoverable volumes, is available during  the  subsequent  year
evaluation.

In  applying industry standards and procedures, the new data may cause  the
previous  estimates to be revised.  This revision may increase or  decrease
the  earlier estimated volumes.  Pertinent information gathered during  the
year  may  include  actual production and decline  rates,  production  from
offset wells drilled to the same geologic formation, increased or decreased
water  production,  workovers, and changes in lifting costs  among  others.
Accordingly,  reserve estimates are often different from the quantities  of
oil and gas that are ultimately recovered.

The  Partnership  has  reserves which are classified  as  proved  developed
producing, proved developed non-producing and proved undeveloped.   All  of
the  proved reserves are included in the engineering reports which evaluate
the Partnership's present reserves.

Because  the  Partnership  does  not engage  in  drilling  activities,  the
development of proved undeveloped reserves is conducted pursuant to farmout
arrangements with the Managing General Partner or unrelated third  parties.
Generally, the Partnership retains a carried interest such as an overriding
royalty interest under the terms of a farmout, or receives cash.

The  Partnership or the owners of properties in which the Partnership  owns
an  interest  can  engage  in workover projects or  supplementary  recovery
projects, for example, to extract behind the pipe reserves which qualify as
proved developed non-producing reserves.  See Part II, Item 7, Management's
Discussion and Analysis of Financial Condition and Results of Operation.

Item 3.   Legal Proceedings

There are no material pending legal proceedings to which the Partnership is
a party.

Item 4.   Submission of Matters to a Vote of Security Holders

No  matter  was submitted to a vote of security holders during  the  fourth
quarter of 2001 through the solicitation of proxies or otherwise.


                                 Part II

Item 5.   Market   for   the   Registrant's  Common  Equity   and   Related
          Stockholder Matters

Market Information
Limited  partnership interests, or units, in the Partnership are  currently
being offered and sold for a price of $500.  Limited partner units are  not
traded  on any exchange and there is no public or organized trading  market
for  them.   Further,  a  transferee may not become  a  substitute  limited
partner without the consent of the Managing General Partner.

The  Managing  General Partner has the right, but not  the  obligation,  to
purchase limited partnership units should an investor desire to sell.   The
value  of  the  unit is determined by adding the sum of (1) current  assets
less  liabilities  and  (2) the present value of the  future  net  revenues
attributable to proved reserves and by discounting the future net  revenues
at  a rate not in excess of the prime rate charged by NationsBank, N.A.  of
Midland, Texas plus one percent (1%), which value shall be further  reduced
by  a risk factor discount of no more than one-third (1/3) to be determined
by the Managing General Partner in its sole and absolute discretion.  As of
December  31, 2001, 2000 and 1999, no limited partner units were  purchased
by the Managing General Partner.

Number of Limited Partner Interest Holders
As of December 31, 2001, there were 177 holders of limited partner units in
the Partnership.

Distributions
Pursuant to Article III, Section 3.05 of the Partnership's Certificate  and
Agreement  of Limited Partnership, "Net Cash Flow" shall be distributed  to
the partners on a quarterly basis.  "Net Cash Flow" is defined as "the cash
generated  by  the  Partnership's investments  in  producing  oil  and  gas
properties,  less (i) General and Administrative Costs, (ii) Direct  Costs,
(iii) Operating Costs, and (iv) any reserves necessary to meet current  and
anticipated needs of the Partnership, as determined in the sole  discretion
of the Managing General Partner."


During  2001,  distributions  were made totaling  $260,419,  with  $234,377
distributed  to  the limited partners and $26,042 to the general  partners.
For  the  year ended December 31, 2001, distributions of $48.32 per limited
partner unit were made, based upon 4,851 limited partner units outstanding.
During  2000,  quarterly  distributions were made totaling  $235,737,  with
$212,163  distributed to the limited partners and $23,574  to  the  general
partners.   For the year ended December 31, 2000, distributions  of  $43.74
per  limited partner unit were made, based upon 4,851 limited partner units
outstanding.   Distributions for 2000 increased significantly  due  to  the
record  high  oil  and gas prices received during the year.   During  1999,
distributions were made totaling $112,699, with $101,599 distributed to the
limited  partners and $11,100 to the general partners.  For the year  ended
December  31, 1999, distributions of $20.94 per limited partner  unit  were
made, based upon 4,851 limited partner units outstanding.

Item 6.   Selected Financial Data

The following selected financial data for the years ended December 31 2001,
2000,  1999, 1998 and 1997 should be read in conjunction with the financial
statements included in Item 8:
                                        Years ended December 31,
                            -----------------------------------------------

                              2001     2000      1999      1998      1997
                              ----     ----      ----      ----      ----
Revenues            $       227,624   305,760   210,376    2,205  304,410

Net income (loss)           128,334   249,986   129,693(462,692)(467,687)

Partners' share of
 net income (loss):

 General partners            18,734    26,699    16,880  (4,631)   25,491

 Limited partners           109,601   223,287   112,814(458,061)(493,178)

Limited partners' net
  income (loss) per unit                 22.59     46.03     23.26  (94.43)
(101.67)

Limited partner's cash
  distribution per unit                  48.32     43.74    20.94     10.85
55.77

Total assets        $       287,587   419,672   405,423  388,507  909,626


Item 7.   Management's  Discussion and Analysis of Financial Condition  and
          Results of Operations

General
Southwest Royalties Institutional Income Fund XI-B, L.P. was organized as a
Delaware  limited partnership on August 31, 1993.  The offering of  limited
partnership  interests began October 25, 1993, as part of a shelf  offering
registered under the name Southwest Royalties Institutional 1992-93  Income
Program.   Minimum  capital requirements for the Partnership  were  met  on
December  8, 1993, and the Offering Period terminated August 20, 1994  with
174 limited partners purchasing 4,851 units for $2,425,500.

The  Partnership was formed to acquire non-operating interests in producing
oil  and  gas  properties, to produce and market crude oil and natural  gas
produced  from  such  properties and to distribute any  net  proceeds  from
operations  to  the  general  and  limited  partners.   Net  revenues  from
producing  oil  and gas properties will not be reinvested in other  revenue
producing  assets except to the extent that producing facilities and  wells
are  reworked  or  where  methods are employed to improve  or  enable  more
efficient  recovery  of oil and gas reserves.  The  economic  life  of  the
Partnership will thus depend on the period over which the Partnership's oil
and gas reserves are economically recoverable.

Increases   or   decreases   in  Partnership   revenues   and,   therefore,
distributions  to partners will depend primarily on changes in  the  prices
received  for  production,  changes in volumes of  production  sold,  lease
operating  expenses, enhanced recovery projects, offset drilling activities
pursuant  to farmout arrangements and on the depletion wells.  Since  wells
deplete  over  time, production can generally be expected to  decline  from
year to year.

Well  operating costs and general and administrative costs usually decrease
with   production  declines;   however,  these  costs  may   not   decrease
proportionately.   Net  income available for distribution  to  the  limited
partners  has  fluctuated  over  the past few  years  and  is  expected  to
fluctuate in later years based on these factors.

Based on current conditions, management anticipates performing no workovers
during  2002 to enhance production.  Additional workovers may be  performed
in  the  year  2003.   The partnership may have an increase  in  production
volumes  for  the  year 2003, otherwise, the partnership will  most  likely
experience the historical production decline of approximately 10% per year.

Critical Accounting Policies
Full cost ceiling calculations The Partnership follows the full cost method
of  accounting  for  its  oil and gas properties.   The  full  cost  method
subjects  companies to quarterly calculations of a "ceiling", or limitation
on  the  amount of properties that can be capitalized on the balance sheet.
If  the  Partnership's capitalized costs are in excess  of  the  calculated
ceiling, the excess must be written off as an expense.

The  Partnership's discounted present value of its proved oil  and  natural
gas  reserves  is  a  major  component  of  the  ceiling  calculation,  and
represents  the  component  that requires the  most  subjective  judgments.
Estimates  of  reserves are forecasts based on engineering data,  projected
future  rates  of  production and the timing of future  expenditures.   The
process  of  estimating oil and natural gas reserves  requires  substantial
judgment,  resulting  in  imprecise determinations,  particularly  for  new
discoveries.   Different reserve engineers may make different estimates  of
reserve  quantities  based  on the same data.   The  Partnership's  reserve
estimates are prepared by outside consultants.

The  passage  of  time  provides  more  qualitative  information  regarding
estimates of reserves, and revisions are made to prior estimates to reflect
updated  information.   However,  there  can  be  no  assurance  that  more
significant  revisions  will not be necessary in  the  future.   If  future
significant  revisions  are  necessary  that  reduce  previously  estimated
reserve quantities, it could result in a full cost property writedown.   In
addition to the impact of these estimates of proved reserves on calculation
of  the  ceiling,  estimates  of proved reserves  are  also  a  significant
component of the calculation of DD&A.



While  the quantities of proved reserves require substantial judgment,  the
associated prices of oil and natural gas reserves that are included in  the
discounted  present  value of the reserves do not  require  judgment.   The
ceiling calculation dictates that prices and costs in effect as of the last
day  of  the  period are generally held constant indefinitely. Because  the
ceiling  calculation dictates that prices in effect as of the last  day  of
the  applicable quarter are held constant indefinitely, the resulting value
is  not indicative of the true fair value of the reserves.  Oil and natural
gas  prices have historically been cyclical and, on any particular  day  at
the  end of a quarter, can be either substantially higher or lower than the
Partnership's  long-term price forecast that is a barometer for  true  fair
value.

The  Partnership's policy for depreciation, depletion and  amortization  of
oil  and  gas  properties is computed under the units  of  revenue  method.
Under the units of revenue method, depreciation, depletion and amortization
is  computed  on  the  basis of current gross revenues from  production  in
relation  to future gross revenues, based on current prices, from estimated
production of proved oil and gas reserves.

Results of Operations

A.  General Comparison of the Years Ended December 31, 2001 and 2000

The  following  table  provides certain information  regarding  performance
factors for the years ended December 31, 2001 and 2000:

                                                  Year Ended     Percentage
                                                 December 31,     Increase
                                                2001      2000   (Decrease)
                                                ----      ----   ---------
Average price per barrel of oil            $   25.48    28.50    (11%)
Average price per mcf of gas               $    3.99     4.14     (4%)
Oil production in barrels                      6,130    6,800    (10%)
Gas production in mcf                         67,500   73,300     (8%)
Income from net profits interests          $ 225,266  303,558    (26%)
Partnership distributions                  $ 260,419  235,737      10%
Limited partner distributions              $ 234,377  212,163      10%
Per unit distribution to limited partners  $   48.32    43.74      10%
Number of limited partner units                4,851    4,851

Revenues

The  Partnership's income from net profits interests decreased to  $225,266
from $303,558 for the years ended December 31, 2001 and 2000, respectively,
a  decrease of 26%.  The principal factors affecting the comparison of  the
years ended December 31, 2001 and 2000 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased  during the year ended December 31, 2001 as compared  to  the
    year ended December 31, 2000 by 11%, or $3.02 per barrel, resulting  in
    a  decrease  of  approximately  $18,500  in  income  from  net  profits
    interests.  Oil sales represented 37% of total oil and gas sales during
    the  year  ended December 31, 2001 as compared to 39% during  the  year
    ended December 31, 2000.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 4%, or $.15 per mcf, resulting in a
    decrease of approximately $10,100 in income from net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in prices received from oil and gas production is approximately
    $28,600.   The market price for oil and gas has been extremely volatile
    over  the  past  decade  and management expects  a  certain  amount  of
    volatility to continue in the foreseeable future.


2.  Oil  production decreased approximately 670 barrels or 10%  during  the
    year ended December 31, 2001 as compared to the year ended December 31,
    2000,  resulting in a decrease of approximately $19,100 in income  from
    net profits interests.

    Gas  production decreased approximately 5,800 mcf or 8% during the same
    period, resulting in a decrease of approximately $24,000 in income from
    net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change in production is approximately $43,100.

3.  Lease  operating  costs  and  production  taxes  were  4%  higher,   or
    approximately $6,800 more during the year ended December  31,  2001  as
    compared to the year ended December 31, 2000.

Costs and Expenses

Total  costs and expenses increased to $99,290 from $55,774 for  the  years
ended  December 31, 2001 and 2000, respectively, an increase of  78%.   The
increase  is  the  result  of  higher depletion  expense  and  general  and
administrative costs.

1.  General and administrative costs consists of independent accounting and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner personnel costs.  General and administrative costs increased 4%
    or  approximately  $1,500 during the year ended December  31,  2001  as
    compared to the year ended December 31, 2000.

2.   Depletion expense increased to $59,000 for the year ended December 31,
   2001 from $17,000 for the same period in 2000.  This represents an increase
   of  247%.  Depletion is calculated using the units of revenue method  of
   amortization based on a percentage of current period gross  revenues  to
   total future gross oil and gas revenues, as estimated by the Partnership's
   independent petroleum consultants.

   The  major  factor  to  the increase in depletion  expense  between  the
    comparative periods was the decrease in the price of oil and  gas  used
    to determine the Partnership's reserves for January 1, 2002 as compared
    to  2001,  and  the decrease in oil and gas revenues  received  by  the
    Partnership  during  2001 as compared to 2000.  Revisions  of  previous
    estimates  can be attributed to the changes in production  performance,
    oil  and  gas  price and production costs.  The impact of the  revision
    would  have  increased depletion expense approximately  $27,000  as  of
    December 31, 2000.





Results of Operations

B.  General Comparison of the Years Ended December 31, 2000 and 1999

The  following  table  provides certain information  regarding  performance
factors for the years ended December 31, 2000 and 1999:

                                                  Year Ended     Percentage
                                                 December 31,     Increase
                                                2000      1999   (Decrease)
                                                ----      ----   ---------

Average price per barrel of oil            $   28.50    16.74      70%
Average price per mcf of gas               $    4.14     2.26      83%
Oil production in barrels                      6,800    9,280    (27%)
Gas production in mcf                         73,300   81,160    (10%)
Income from net profits interests          $ 303,558  188,298      61%
Partnership distributions                  $ 235,737  112,699     109%
Limited partner distributions              $ 212,163  101,599     109%
Per unit distribution to limited partners  $   43.74    20.94     109%
Number of limited partner units                4,851    4,851

Revenues

The  Partnership's income from net profits interests increased to  $303,558
from $188,298 for the years ended December 31, 2000 and 1999, respectively,
an  increase of 61%.  The principal factors affecting the comparison of the
years ended December 31, 2000 and 1999 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    increased  during the year ended December 31, 2000 as compared  to  the
    year ended December 31, 1999 by 70%, or $11.76 per barrel, resulting in
    an  increase  of  approximately $80,000  in  income  from  net  profits
    interests.  Oil sales represented 39% of total oil and gas sales during
    the  year  ended December 31, 2000 as compared to 46% during  the  year
    ended December 31, 1999.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    increased during the same period by 83%, or $1.88 per mcf, resulting in
    an  increase  of  approximately $137,800 in  income  from  net  profits
    interests.

    The  total  increase in income from net profits interests  due  to  the
    change  in prices received from oil and gas production is approximately
    $217,800.  The market price for oil and gas has been extremely volatile
    over  the  past  decade  and management expects  a  certain  amount  of
    volatility to continue in the foreseeable future.


2.  Oil  production decreased approximately 2,480 barrels or 27% during the
    year ended December 31, 2000 as compared to the year ended December 31,
    1999,  resulting in a decrease of approximately $41,500 in income  from
    net profits interests.

    Gas production decreased approximately 7,860 mcf or 10% during the same
    period, resulting in a decrease of approximately $17,800 in income from
    net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in  production  is  approximately  $59,300.   The  decrease  in
    production is in relation to a settlement of royalty on the Dagger Draw
    Lease.   Production interest of approximately 1,100 barrels  and  1,070
    mcfs  were held in suspense from 1993 through 1999.  These dollars were
    received  and recorded in the Partnership during the third  quarter  of
    1999. Production without the settlement would be a decrease of 25%  for
    oil and 29% for gas.  This decrease was due to the occurrence of payout
    on  the  Dagger  Draw.   Upon occurrence of payout  the  percentage  of
    ownership for the Partnership decrease significantly.

3.  Lease  operating  costs  and  production  taxes  were  28%  higher,  or
    approximately $42,800 more during the year ended December 31,  2000  as
    compared  to the year ended December 31, 1999.  The increase  in  lease
    operating  costs and production taxes is due in part to an increase  in
    major repairs and maintenance, such as pulling expense on three leases,
    and  in  part to the rise in production taxes directly associated  with
    the rise in oil and gas prices received during the past year.  The rise
    in  oil  and gas prices for 2000 has allowed the Partnership to perform
    these  repairs  and maintenance in the hopes of increasing  production,
    thereby increasing revenues.

Costs and Expenses

Total  costs and expenses decreased to $55,774 from $80,682 for  the  years
ended  December 31, 2000 and 1999, respectively, a decrease  of  31%.   The
decrease  is  the  result  of  lower  depletion  expense  and  general  and
administrative costs.

1.  General and administrative costs consists of independent accounting and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner personnel costs.  General and administrative costs decreased 7%
    or  approximately  $2,800 during the year ended December  31,  2000  as
    compared to the year ended December 31, 1999.

3.   Depletion expense decreased to $17,000 for the year ended December 31,
   2000 from $39,000 for the same period in 1999.  This represents a decrease
   of  56%.   Depletion is calculated using the units of revenue method  of
   amortization based on a percentage of current period gross  revenues  to
   total future gross oil and gas revenues, as estimated by the Partnership's
   independent petroleum consultants.

   The  major  factor  to  the decrease in depletion  expense  between  the
    comparative periods was the increase in the price of oil and  gas  used
    to determine the Partnership's reserves for January 1, 2001 as compared
    to  2000.   Another  contributing factor  was  due  to  the  impact  of
    revisions  of  previous estimates on reserves.  Revisions  of  previous
    estimates  can be attributed to the changes in production  performance,
    oil  and  gas  price and production costs.  The impact of the  revision
    would  have  decreased  depletion expense approximately  $3,000  as  of
    December 31, 1999.





C.  Revenue and Distribution Comparison

Partnership income for the years ended December 31, 2001, 2000 and 1999 was
$128,334,  $249,986 and $129,694, respectively.  Excluding the  effects  of
depreciation,  depletion  and amortization,  net  income  would  have  been
$187,334  in 2001, $266,986 in 2000 and $168,796 in 1999.  Correspondingly,
Partnership distributions for the years ended December 31, 2001,  2000  and
1999 were $260,419, $235,737 and $112,699, respectively.  These differences
are  indicative  of  the  changes in oil and  gas  prices,  production  and
property.

The  source  for  the  2001  distributions of $260,419  were  oil  and  gas
operations  of  approximately $231,800, and  the  change  in  oil  and  gas
properties  of approximately $27,600, with the balance from available  cash
on  hand  at  the  beginning  of  the period.   The  source  for  the  2000
distributions  of  $235,737  were oil and gas operations  of  approximately
$247,300,   resulting  in  excess  cash  for  contingencies  or  subsequent
distributions. The sources for the 1999 distributions of $112,699 were  oil
and gas operations of approximately $133,600, and the change in oil and gas
properties   of  approximately  $1,600,  resulting  in  excess   cash   for
contingencies or subsequent distributions.

Total  distributions during the year ended December 31, 2001 were  $260,419
of  which  $234,377 was distributed to the limited partners and $26,042  to
the general partners.  The per unit distribution to limited partners during
the  same  period was $48.32.  Total distributions during  the  year  ended
December  31, 2000 were $235,737 of which $212,163 was distributed  to  the
limited  partners  and  $23,574  to the general  partners.   The  per  unit
distribution to limited partners during the same period was $43.74.   Total
distributions  during  the year ended December 31, 1999  were  $112,699  of
which  $101,599 was distributed to the limited partners and $11,100 to  the
general partners.  The per unit distribution to limited partners during the
same period was $20.94.

Since  inception of the Partnership, cumulative monthly cash  contributions
of  $1,598,294  have been made to the partners.  As of December  31,  2001,
$1,452,492 or $299.42 per limited partner unit, has been distributed to the
limited partners, representing a 60% return of the capital contributed.


Liquidity and Capital Resources

The  primary source of cash is from operations, the receipt of income  from
net profits interests in oil and gas properties.  The Partnership knows  of
no material change, nor does it anticipate any such change.

Cash flows provided by operating activities were approximately $231,800  in
2001 compared to $247,300 in 2000 and approximately $133,600 in 1999.   The
primary  source  of  the  2001  cash flow  from  operating  activities  was
profitable operations.

Cash  flows provided by investing activities were approximately $27,600  in
2001.  The Partnership had no cash flows from investing activities in 2000.
Cash  flows provided by investing activities were approximately  $1,600  in
1999.   The  primary source of the 2001 cash flow from investing activities
was the sale of oil and gas properties.

Cash flows used in financing activities were approximately $260,400 in 2001
compared to $235,700 in 2000 and approximately $112,800 in 1999.  The  only
2001 use in financing activities was the distribution to partners.

As  of  December  31,  2001, the Partnership had approximately  $50,600  in
working   capital.   The  Managing  General  Partner  knows  of  no   other
commitments  and  believes the revenues generated from operations  will  be
adequate to meet the operating needs of the Partnership.

Liquidity - Managing General Partner

The  Managing General Partner has a highly leveraged capital structure with
$50.0  million and $123.7 million of principal due in August  of  2003  and
October  of  2004, respectively.  The Managing General Partner  will  incur
approximately  $17.6  million in interest payments  in  2002  on  its  debt
obligations. Due to the depressed commodity prices experienced  during  the
last  quarter  of  2001,  the  Managing  General  Partner  is  experiencing
difficulty  in generating sufficient cash flow to meet its obligations  and
sustain its operations.  The Managing General Partner is currently  in  the
process  of  renegotiating the terms of its various  obligations  with  its
creditors  and/or  attempting  to seek new  lenders  or  equity  investors.
Additionally,  the  Managing General Partner would  consider  disposing  of
certain assets in order to meet its obligations.

There  can  be  no  assurance  that  the Managing  General  Partner's  debt
restructuring efforts will be successful or that the lenders will agree  to
a   course   of  action  consistent  with  the  Managing  General  Partners
requirements  in restructuring the obligations.  Even if such agreement  is
reached,  it  may  require approval of additional  lenders,  which  is  not
assured.   Furthermore, there can be no assurance that the sales of  assets
can  be  successfully  accomplished on terms  acceptable  to  the  Managing
General   Partner.   Under  current  circumstances,  the  Managing  General
Partner's  ability to continue as a going concern depends upon its  ability
to  (1)  successfully  restructure  its obligations  or  obtain  additional
financing  as  may  be  required, (2) maintain  compliance  with  all  debt
covenants, (3) generate sufficient cash flow to meet its obligations  on  a
timely  basis, and (4) achieve satisfactory levels of future earnings.   If
the  Managing  General Partner is unsuccessful in its efforts,  it  may  be
unable to meet its obligations making it necessary to undertake such  other
actions  as  may  be  appropriate  to  preserve  asset  values.   Upon  the
occurrence of any event of dissolution by the Managing General Partner, the
holders  of  a  majority of limited partnership interests may,  by  written
agreement,  elect  to  continue the business  of  the  Partnership  in  the
Partnership's   name,  with  Partnership  property,  in   a   reconstituted
partnership under the terms of the partnership agreement and to designate a
successor Managing General Partner.


Recent Accounting Pronouncements

In  June  1998,  the Financial Accounting Standards Board  ("FASB")  issued
Statement  of  Financial Accounting Standards ("SFAS") No.133,  "Accounting
for  Derivative  Instruments and Hedging Activities."   SFAS  No.  133,  as
amended by SFAS No. 138, establishes accounting and reporting standards for
derivative  instruments, including certain derivative instruments  embedded
in  other contracts and for hedging activities.  Assessment by the Managing
General  Partner  revealed this pronouncement to  have  no  impact  on  the
partnerships.

The  FASB  has  issued Statement No. 143 "Accounting for  Asset  Retirement
Obligations" which establishes requirements for the accounting of  removal-
type  costs  associated with asset retirements.  The standard is  effective
for  fiscal  years beginning after June 15, 2002, with earlier  application
encouraged.  The Managing General Partner is currently assessing the impact
on the partnerships financial statements.

On  October 3, 2001, the FASB issued Statements No. 144 "Accounting for the
Impairment   or   Disposal  of  Long-Lived  Assets."   This   pronouncement
supercedes FAS 121 "Accounting for the Impairment of Long-Lived Assets  and
for  Long-Lived  Assets to Be Disposed" and eliminates the  requirement  of
Statement  121 to allocate goodwill to long-lived assets to be  tested  for
impairment.   The provisions of this statement are effective for  financial
statements issued for fiscal years beginning after December 15,  2001,  and
interim periods within those fiscal years.  The Managing General Partner is
currently assessing the impact to the partnerships financial statements.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk

The  Partnership  is  not a party to any derivative or embedded  derivative
instruments.



Item 8.   Financial Statements and Supplementary Data

                      Index to Financial Statements

                                                                       Page

Independent Auditors Report                                             19

Balance Sheets                                                          20

Statements of Operations                                                21

Statements of Changes in Partners' Equity                               22

Statements of Cash Flows                                                23

Notes to Financial Statements                                           25











                        INDEPENDENT AUDITORS REPORT

The Partners
Southwest Royalties Institutional
 Income Fund XI-B, L.P.
(A Delaware Limited Partnership):


We  have  audited  the  accompanying balance sheets of Southwest  Royalties
Institutional Income Fund XI-B, L.P. (the "Partnership") as of December 31,
2001  and  2000,  and  the  related statements of  operations,  changes  in
partners'  equity and cash flows for each of the years in  the  three  year
period  ended  December  31,  2001.  These  financial  statements  are  the
responsibility of the Partnership's management.  Our responsibility  is  to
express an opinion on these financial statements based on our audits.

We  conducted  our  audits in accordance with auditing standards  generally
accepted in the United States of America.  Those standards require that  we
plan and perform the audit to obtain reasonable assurance about whether the
financial statements are free of material misstatement.  An audit  includes
examining, on a test basis, evidence supporting the amounts and disclosures
in  the  financial  statements.   An  audit  also  includes  assessing  the
accounting principles used and significant estimates made by management, as
well  as  evaluating  the  overall financial  statement  presentation.   We
believe that our audits provide a reasonable basis for our opinion.

In  our opinion, the financial statements referred to above present fairly,
in  all  material  respects, the financial position of Southwest  Royalties
Institutional Income Fund XI-B, L.P. as of December 31, 2001 and  2000  and
the  results of its operations and its cash flows for each of the years  in
the three year period ended December 31, 2001 in conformity with accounting
principles generally accepted in the United States of America.








                                                  KPMG LLP



Midland, Texas
March 10, 2002



         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)
                              Balance Sheets
                        December 31, 2001 and 2000


                                                      2001          2000
                                                      ----          ----
  Assets
  ------

Current assets:
 Cash and cash equivalents                   $        35,398       36,446
 Receivable from Managing General Partner             15,165       59,613

- ---------                                    ---------
                                                 Total    current    assets
50,563                                       96,059

- ---------                                    ---------
Oil and gas properties - using the full-
 cost method of accounting                         1,978,745    2,006,334
                                             Less accumulated depreciation,
                                               depletion  and  amortization
1,741,721                                    1,682,721

- ---------                                    ---------
                                              Net  oil  and gas  properties
237,024                                      323,613

- ---------                                    ---------
                                                                          $
287,587                                      419,672

=========                                    =========
  Liabilities and Partners' Equity
  --------------------------------

Partners' equity:
 General partners                            $         2,395        9,703
 Limited partners                                    285,192      409,969

- ---------                                    ---------
                                                Total    partners'   equity
287,587                                      419,672

- ---------                                    ---------
                                                                          $
287,587                                      419,672

=========                                    =========
























                  The accompanying notes are an integral
                    part of these financial statements.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)
                         Statements of Operations
               Years ended December 31, 2001, 2000 and 1999


                                                 2001      2000      1999
                                                 ----      ----      ----
  Revenues
  --------
Income from net profits interests         $    225,266   303,558  188,298
Interest from operations                         2,358     2,202    1,078
Miscellaneous income                                 -         -   21,000
                                                                    -------
- -------                                   -------
                                                                    227,624
305,760                                   210,376
                                                                    -------
- -------                                   -------
  Expenses
  --------
General and administrative                      40,290    38,774   41,580
Depreciation, depletion and amortization        59,000    17,000   39,102
                                                                    -------
- -------                                   -------
                                                                     99,290
55,774                                    80,682
                                                                    -------
- -------                                   -------
Net income                                $    128,334   249,986  129,694
                                                                    =======
=======                                   =======
Net income allocated to:

 Managing General Partner                 $     16,860    24,029   15,193
                                                                    =======
=======                                   =======
 General Partner                          $      1,874     2,670    1,688
                                                                    =======
=======                                   =======
 Limited partners                         $    109,600   223,287  112,813
                                                                    =======
=======                                   =======
  Per limited partner unit                $      22.59     46.03    23.26
                                                                    =======
=======                                   =======





























                  The accompanying notes are an integral
                    part of these financial statements.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)
                Statements of Changes in Partners' Equity
               Years ended December 31, 2001, 2000 and 1999


                                               General   Limited
                                               Partners  Partners  Total
                                               --------  --------  -----

Balance at December 31, 1998              $        797   387,631  388,428

 Net income                                     16,881   112,813  129,694

 Distributions                                (11,100) (101,599)(112,699)
                                                                    -------
- ---------                                 ---------
Balance at December 31, 1999                     6,578   398,845  405,423

 Net income                                     26,699   223,287  249,986

 Distributions                                (23,574) (212,163)(235,737)
                                                                    -------
- ---------                                 ---------
Balance at December 31, 2000                     9,703   409,969  419,672

 Net income                                     18,734   109,600  128,334

 Distributions                                (26,042) (234,377)(260,419)
                                                                    -------
- ---------                                 ---------
Balance at December 31, 2001              $      2,395   285,192  287,587
                                                                    =======
=========                                 =========


































                  The accompanying notes are an integral
                    part of these financial statements.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)
                         Statements of Cash Flows
               Years ended December 31, 2001, 2000 and 1999


                                                 2001      2000      1999
                                                 ----      ----      ----
Cash flows from operating activities:

 Cash received from net profits interests $    265,384   284,309  162,358
 Cash paid to Managing General Partner
  for administrative fees and general
                                            and   administrative   overhead
(35,960)                                  (39,182)(29,800)
 Interest received                               2,358     2,202    1,078
                                                                   --------
- --------                                  -------
   Net  cash provided by operating activities              231,782  247,329
133,636
                                                                   --------
- --------                                  -------
Cash flows from investing activities:

 Sales of oil and gas properties                27,589         -    1,586
                                                                   --------
- --------                                  -------
Cash flows used in financing activities:

 Distributions to partners                   (260,419) (235,667)(112,848)
                                                                   --------
- --------                                  -------
Net (decrease) increase in cash and cash
 equivalents                                   (1,048)    11,662   22,374

 Beginning of period                            36,446    24,784    2,410
                                                                   --------
- --------                                  -------
 End of period                            $     35,398    36,446   24,784
                                                                   ========
========                                  =======


(continued)





























                  The accompanying notes are an integral
                   part of these financial statements.

         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)
                   Statements of Cash Flows, continued
               Years ended December 31, 2001, 2000 and 1999


                                                 2001      2000      1999
                                                 ----      ----      ----

Reconciliation of net income to net
 cash provided by operating activities:

Net income                                $    128,334   249,986  129,694

Adjustments to reconcile net income to
 net cash provided by operating activities:

   Depreciation, depletion and amortization                59,000    17,000
39,102
  Decrease (increase) in receivables            40,118  (19,249) (25,940)
  Increase (decrease) in payables                4,330     (408)  (9,220)
                                                                    -------
- -------                                   -------
Net cash provided by operating activities $    231,782   247,329  133,636
                                                                    =======
=======                                   =======









































                  The accompanying notes are an integral
                    part of these financial statements.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

1.   Organization
     Southwest Royalties Institutional Income Fund XI-B, L.P. was organized
     under  the laws of the state of Delaware on August 31, 1993,  for  the
     purpose  of acquiring producing oil and gas properties and to  produce
     and market crude oil and natural gas produced from such properties for
     a  term  of 50 years, unless terminated at an earlier date as provided
     for  in the Partnership Agreement.  The Partnership will sell its  oil
     and  gas  production  to a variety of purchasers with  the  prices  it
     receives  being  dependent upon the oil and  gas  economy.   Southwest
     Royalties,  Inc.  serves as the Managing General  Partner  and  H.  H.
     Wommack, III, as the individual general partner.  Partnership  profits
     and losses, as well as all items of income, gain, loss, deduction,  or
     credit, will be credited or charged as follows:

                                                    Limited   General
                                                    Partner   Partners (1)
                                                    -------   --------
     Organization and offering expenses (2)        100%          -
     Acquisition costs                             100%          -
     Operating costs                                90%        10%
     Administrative costs (3)                       90%        10%
     Direct costs                                   90%        10%
     All other costs                                90%        10%
     Interest income earned on capital
                                          contributions       100%    -
     Oil and gas revenues                           90%        10%
     All other revenues                             90%        10%
     Amortization                                  100%          -
     Depletion allowances                          100%          -

          (1)   H.H.  Wommack,  III,  President  of  the  Managing  General
          Partner, is an additional general partner in the Partnership  and
          has  a  one percent interest in the Partnership.  Mr. Wommack  is
          the  majority  stockholder of the Managing General Partner  whose
          continued  involvement in Partnership management is important  to
          its  operations.  Mr. Wommack, as a general partner, shares  also
          in Partnership liabilities.

          (2)   Organization and Offering Expenses (including all  cost  of
          selling  and  organizing the offering) include a payment  by  the
          Partnership of an amount equal to three percent (3%)  of  Capital
          Contributions   for   reimbursement  of   such   expenses.    All
          Organization Costs (which excludes sales commissions and fees) in
          excess  of  three  percent  (3%) of  Capital  Contributions  with
          respect to the Partnership will be allocated to and paid  by  the
          Managing General Partner.

          (3)   Administrative  Costs will be paid from  the  Partnership's
          revenues;  however; Administrative Costs in the Partnership  year
          in  excess of two percent (2%) of Capital Contributions shall  be
          allocated to and paid by the Managing General Partner.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

2.   Summary of Significant Accounting Policies

     Oil and Gas Properties
     Oil  and  gas properties are accounted for at cost under the full-cost
     method.   Under  this  method, all productive and nonproductive  costs
     incurred   in   connection  with  the  acquisition,  exploration   and
     development of oil and gas reserves are capitalized.  Gain or loss  on
     the   sale  of  oil  and  gas  properties  is  not  recognized  unless
     significant oil and gas reserves are involved.

     The  Partnership's policy for depreciation, depletion and amortization
     of  oil  and  gas  properties is computed under the units  of  revenue
     method.   Under  the units of revenue method, depreciation,  depletion
     and  amortization is computed on the basis of current  gross  revenues
     from production in relation to future gross revenues, based on current
     prices, from estimated production of proved oil and gas reserves.

     Under  the  units  of  revenue method, the  Partnership  computes  the
     provision  by multiplying the total unamortized cost of  oil  and  gas
     properties by an overall rate determined by dividing (a) oil  and  gas
     revenues during the period by (b) the total future gross oil  and  gas
     revenues  as  estimated  by  the Partnership's  independent  petroleum
     consultants.   It  is  reasonably possible  that  those  estimates  of
     anticipated  future  gross revenues, the remaining estimated  economic
     life  of  the product, or both could be changed significantly  in  the
     near  term  due to the potential fluctuation of oil and gas prices  or
     production.   The  depletion estimate would also be affected  by  this
     change.

     Should the net capitalized costs exceed the estimated present value of
     oil  and  gas reserves, discounted at 10%, such excess costs would  be
     charged  to current expense. As of December 31, 2001, 2000  and  1999,
     the  net capitalized costs did not exceed the estimated value  of  oil
     and gas reserves.

     The  Partnership's interest in oil and gas properties consists of  net
     profits  interests in proved properties located within the continental
     United States.  A net profits interest is created when the owner of  a
     working  interest  in a property enters into an arrangement  providing
     that  the  net profits interest owner will receive a stated percentage
     of  the net profit from the property.  The net profits interest  owner
     will not otherwise participate in additional costs and expenses of the
     property.

     Estimates and Uncertainties
     The  preparation of financial statements in conformity with  generally
     accepted  accounting principles requires management to make  estimates
     and  assumptions  that  affect  the reported  amounts  of  assets  and
     liabilities and disclosure of contingent assets and liabilities at the
     date  of the financial statements and the reported amounts of revenues
     and  expenses during the reporting period. The Partnerships  depletion
     calculation and full-cost ceiling test for oil and gas properties uses
     oil and gas reserves estimates, which are inherently imprecise. Actual
     results could differ from those estimates.

     Syndication Costs
     Syndication  costs  are  accounted for as a reduction  of  partnership
     equity.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

2.   Summary of Significant Accounting Policies - continued

     Environmental Costs
     The  Partnership  is  subject to extensive federal,  state  and  local
     environmental laws and regulations.  These laws, which are  constantly
     changing, regulate the discharge of materials into the environment and
     may  require  the Partnership to remove or mitigate the  environmental
     effects of the disposal or release of petroleum or chemical substances
     at   various  sites.   Environmental  expenditures  are  expensed   or
     capitalized  depending on their future economic benefit.  Costs  which
     improve a property as compared with the condition of the property when
     originally  constructed  or acquired and costs  which  prevent  future
     environmental contamination are capitalized.  Expenditures that relate
     to  an  existing condition caused by past operations and that have  no
     future  economic benefits are expensed.  Liabilities for  expenditures
     of  a  non-capital  nature are recorded when environmental  assessment
     and/or  remediation  is  probable, and the  costs  can  be  reasonably
     estimated.

     Gas Balancing
     The  Partnership  utilizes the sales method  of  accounting  for  gas-
     balancing  arrangements.  Under this method the Partnership recognizes
     sales  revenue  on all gas sold.  As of December 31,  2001,  2000  and
     1999, there were no significant amounts of imbalance in terms of units
     and value.

     Income Taxes
     No  provision  for  income  taxes  is  reflected  in  these  financial
     statements, since the tax effects of the Partnership's income or  loss
     are passed through to the individual partners.

     In   accordance  with  the  requirements  of  Statement  of  Financial
     Accounting  Standards  No. 109, "Accounting  for  Income  Taxes,"  the
     Partnership's tax basis in its oil and gas properties at December  31,
     2001  and  2000 is $437,324 and $427,595 more than that shown  on  the
     accompanying  Balance  Sheet  in accordance  with  generally  accepted
     accounting principles.

     Cash and Cash Equivalents
     For purposes of the statement of cash flows, the Partnership considers
     all  highly liquid debt instruments purchased with a maturity of three
     months or less to be cash equivalents.  The Partnership maintains  its
     cash at one financial institution.

     Number of Limited Partner Units
     As  of  December  31,  2001, 2000 and 1999 there  were  4,851  limited
     partner units outstanding held by 177, 177 and 175 partners.

     Concentrations of Credit Risk
     The  Partnership is subject to credit risk through trade  receivables.
     Although  a  substantial portion of its debtors'  ability  to  pay  is
     dependent upon the oil and gas industry, credit risk is minimized  due
     to  a  large customer base.  All partnership revenues are received  by
     the   Managing  General  Partner  and  subsequently  remitted  to  the
     partnership and all expenses are paid by the Managing General  Partner
     and subsequently reimbursed by the partnership.

     Fair Value of Financial Instruments
     The  carrying amount of cash and accounts receivable approximates fair
     value due to the short maturity of these instruments.

     Net Income (loss) per limited partnership unit
     The  net  income (loss) per limited partnership unit is calculated  by
     using the number of outstanding limited partnership units.



         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

2.   Summary of Significant Accounting Policies - continued

     Recent Accounting Pronouncements
     In June 1998, the Financial Accounting Standards Board ("FASB") issued
     Statement   of   Financial  Accounting  Standards   ("SFAS")   No.133,
     "Accounting for Derivative Instruments and Hedging Activities."   SFAS
     No.  133,  as  amended  by  SFAS No. 138, establishes  accounting  and
     reporting  standards  for  derivative instruments,  including  certain
     derivative  instruments embedded in other contracts  and  for  hedging
     activities.  Assessment by the Managing General Partner revealed  this
     pronouncement to have no impact on the partnerships.

     The FASB has issued Statement No. 143 "Accounting for Asset Retirement
     Obligations"  which  establishes requirements for  the  accounting  of
     removal-type costs associated with asset retirements.  The standard is
     effective for fiscal years beginning after June 15, 2002, with earlier
     application  encouraged.  The Managing General  Partner  is  currently
     assessing the impact on the partnerships financial statements.

     On October 3, 2001, the FASB issued Statements No. 144 "Accounting for
     the  Impairment or Disposal of Long-Lived Assets."  This pronouncement
     supercedes FAS 121 "Accounting for the Impairment of Long-Lived Assets
     and   for  Long-Lived  Assets  to  Be  Disposed"  and  eliminates  the
     requirement of Statement 121 to allocate goodwill to long-lived assets
     to  be  tested  for impairment.  The provisions of this statement  are
     effective  for financial statements issued for fiscal years  beginning
     after  December  15,  2001, and interim periods  within  those  fiscal
     years.  The Managing General Partner is currently assessing the impact
     to the partnerships financial statements.

3.   Liquidity - Managing General Partner

     The  Managing General Partner has a highly leveraged capital structure
     with  $50.0 million and $123.7 million of principal due in  August  of
     2003  and October of 2004, respectively.  The Managing General Partner
     will incur approximately $17.6 million in interest payments in 2002 on
     its   debt   obligations.  Due  to  the  depressed  commodity   prices
     experienced  during  the last quarter of 2001,  the  Managing  General
     Partner is experiencing difficulty in generating sufficient cash  flow
     to  meet  its  obligations and sustain its operations.   The  Managing
     General Partner is currently in the process of renegotiating the terms
     of  its  various obligations with its creditors and/or  attempting  to
     seek  new  lenders  or equity investors.  Additionally,  the  Managing
     General Partner would consider disposing of certain assets in order to
     meet its obligations.

     There  can  be  no assurance that the Managing General Partner's  debt
     restructuring  efforts  will be successful or that  the  lenders  will
     agree  to  a  course  of action consistent with the  Managing  General
     Partners requirements in restructuring the obligations.  Even if  such
     agreement  is reached, it may require approval of additional  lenders,
     which is not assured.  Furthermore, there can be no assurance that the
     sales  of  assets can be successfully accomplished on terms acceptable
     to  the  Managing  General Partner.  Under current circumstances,  the
     Managing  General  Partner's ability to continue as  a  going  concern
     depends   upon  its  ability  to  (1)  successfully  restructure   its
     obligations  or  obtain additional financing as may be  required,  (2)
     maintain  compliance with all debt covenants, (3) generate  sufficient
     cash  flow to meet its obligations on a timely basis, and (4)  achieve
     satisfactory  levels  of  future earnings.  If  the  Managing  General
     Partner  is unsuccessful in its efforts, it may be unable to meet  its
     obligations making it necessary to undertake such other actions as may
     be  appropriate to preserve asset values.  Upon the occurrence of  any
     event of dissolution by the Managing General Partner, the holders of a
     majority  of limited partnership interests may, by written  agreement,
     elect to continue the business of the Partnership in the Partnership's
     name,  with Partnership property, in a reconstituted partnership under
     the  terms  of the partnership agreement and to designate a  successor
     Managing General Partner.



         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

4.   Commitments and Contingent Liabilities
     The Managing General Partner has the right, but not the obligation, to
     purchase limited partnership units should an investor desire to  sell.
     The  value of the unit is determined by adding the sum of (1)  current
     assets  less liabilities and (2) the present value of the  future  net
     revenues attributable to proved reserves and by discounting the future
     net  revenues  at  a rate not in excess of the prime rate  charged  by
     NationsBank, N.A. of Midland, Texas plus one percent (1%), which value
     shall be further reduced by a risk factor discount of no more than one-
     third  (1/3) to be determined by the Managing General Partner  in  its
     sole and absolute discretion.

     The  Partnership  is  subject  to various  federal,  state  and  local
     environmental  laws  and  regulations, which establish  standards  and
     requirements  for  protection  of the  environment.   The  Partnership
     cannot  predict the future impact of such standards and  requirements,
     which  are  subject to change and can have retroactive  effectiveness.
     The  Partnership  continues to monitor the status of  these  laws  and
     regulations.

     As  of December 31, 2001, the Partnership has not been fined, cited or
     notified  of any environmental violations and management is not  aware
     of  any  unasserted  violations which would have  a  material  adverse
     effect upon capital expenditures, earnings or the competitive position
     in  the  oil and gas industry.  However, the Managing General  Partner
     does  recognize  by  the very nature of its business,  material  costs
     could be incurred in the near term to bring the Partnership into total
     compliance.   The amount of such future expenditures is  not  reliably
     determinable  due to several factors, including the unknown  magnitude
     of  possible  contaminations, the unknown timing  and  extent  of  the
     corrective  actions  which may be required, the determination  of  the
     Partnership's liability in proportion to other responsible parties and
     the  extent to which such expenditures are recoverable from  insurance
     or indemnifications from prior owners of Partnership's properties.

         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

5.   Related Party Transactions
     A  significant  portion  of the oil and gas properties  in  which  the
     Partnership  has  an interest are operated by and purchased  from  the
     Managing  General Partner.  As provided for in the operating agreement
     for  each respective oil and gas property in which the Partnership has
     an  interest,  the  operator  is  paid an  amount  for  administrative
     overhead attributable to operating such properties, with such  amounts
     to  Southwest  Royalties,  Inc.  as  operator  approximating  $56,800,
     $55,500  and $55,300 for the years ended December 31, 2001,  2000  and
     1999,  respectively.   In addition, the Managing General  Partner  and
     certain  officers and employees may have an interest in  some  of  the
     properties that the Partnership also participates.

     Certain  subsidiaries  or affiliates of the Managing  General  Partner
     perform  various  oilfield  services  for  properties  in  which   the
     Partnership  owns an interest.  Such services aggregated approximately
     $4,100, $2,500 and $5,200 for the years ended December 31, 2001,  2000
     and 1999, respectively.

     Southwest  Royalties,  Inc., the Managing General  Partner,  was  paid
     $34,800 in 2001 and 2000 and $36,000 in 1999, as an administrative fee
     for indirect general and administrative overhead expenses.

     Receivables  from  Southwest  Royalties, Inc.,  the  Managing  General
     Partner,  of  approximately $15,165 and $59,613 are from oil  and  gas
     production, net of lease operating costs and production taxes,  as  of
     December 31, 2001 and 2000, respectively.

     In addition, a director and officer of the Managing General Partner is
     a  partner  in a law firm, with such firm providing legal services  to
     the  Partnership.  There were no legal services for  the  years  ended
     December 31, 2001, 2000 and 1999.

6.   Major Customers
     No  material portion of the Partnership's business is dependent  on  a
     single  purchaser, or a very few purchasers, where  the  loss  of  one
     would  have  a  material  adverse impact on  the  Partnership.   Three
     purchasers  accounted for 93% of the Partnership's total oil  and  gas
     production  during  2001:   Sid Richardson Energy  Services  for  52%,
     Navajo  Refining  Company for 31% and Duke Energy Field  Services  for
     10%.   Three  purchasers accounted for 91% of the Partnership's  total
     oil  and gas production during 2000:  Sid Richardson Gasoline Co.  for
     44%, Navajo Refining Company, Inc. for 37% and Phillips 66 Natural Gas
     for  10%.   Three  purchasers accounted for 84% of  the  Partnership's
     total oil and gas production during 1999:  Navajo Refining Company for
     40%, Sid Richardson Gasoline Co. for 33% and Phillips 66 for 11%.  All
     purchasers  of the Partnership's oil and gas production are  unrelated
     third  parties.   In  the  event  any  of  these  purchasers  were  to
     discontinue  purchasing  the Partnership's  production,  the  Managing
     General  Partner  believes that a substitute purchaser  or  purchasers
     could  be  located without undue delay.  No other purchaser  accounted
     for  an amount equal to or greater than 10% of the Partnership's sales
     of oil and gas production.



         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

7.   Estimated Oil and Gas Reserves (unaudited)
     The  Partnership's  interest in proved oil  and  gas  reserves  is  as
     follows:

                                                    Oil (bbls)    Gas (mcf)
                                                    ----------    ---------
     Proved developed and undeveloped
      reserves -

     January 1, 1999                                  22,000      638,000

       Revisions of previous estimates                49,000      227,000
       Production                                    (9,000)     (81,000)
                                                     -------    ---------
     December 31, 1999                                62,000      784,000

       Revisions of previous estimates                13,000       85,000
       Production                                    (7,000)     (73,000)
                                                     -------    ---------
     December 31, 2000                                68,000      796,000

       Sales of reserves in place                    (2,000)     (10,000)
       Revisions of previous estimates              (33,000)    (226,000)
       Production                                    (6,000)     (68,000)
                                                     -------    ---------
     December 31, 2001                                27,000      492,000
                                                     =======    =========
     Proved developed reserves -
     December 31, 1999                                61,000      770,000
                                                     =======    =========
     December 31, 2000                                67,000      783,000
                                                     =======    =========
     December 31, 2001                                27,000      479,000
                                                     =======    =========

     All  of  the Partnership's reserves are located within the continental
     United States.

     *Ryder  Scott  Petroleum Engineers prepared the  reserve  and  present
     value data for the Partnership's existing properties as of January  1,
     2002.   The  reserve estimates were made in accordance with guidelines
     established by the Securities and Exchange Commission pursuant to Rule
     4-10(a)  of  Regulation  S-X.  Such guidelines  require  oil  and  gas
     reserve  reports  be  prepared under existing economic  and  operating
     conditions with no provisions for price and cost escalation except  by
     contractual arrangements.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

7.   Estimated Oil and Gas Reserves (unaudited) - continued
     Oil  price  adjustments  were made in the  individual  evaluations  to
     reflect  oil quality, gathering and transportation costs. The  results
     of  the  reserve report as of January 1, 2002 are an average price  of
     $17.10 per barrel.

     Gas  price  adjustments  were made in the  individual  evaluations  to
     reflect  BTU  content,  gathering and  transportation  costs  and  gas
     processing  and shrinkage.  The results of the reserve  report  as  of
     January 1, 2002 are an average price of $2.22 per Mcf.

     The  evaluation of oil and gas properties is not an exact science  and
     inevitably  involves a significant degree of uncertainty, particularly
     with respect to the quantity of oil or gas that any given property  is
     capable of producing.  Estimates of oil and gas reserves are based  on
     available  geological and engineering data, the extent and quality  of
     which may vary in each case and, in certain instances, may prove to be
     inaccurate.   Consequently, properties may be  depleted  more  rapidly
     than the geological and engineering data have indicated.

     Unanticipated  depletion, if it occurs, will result in lower  reserves
     than  previously estimated; thus an ultimately lower  return  for  the
     Partnership.  Basic changes in past reserve estimates occur  annually.
     As  new data is gathered during the subsequent year, the engineer must
     revise  his  earlier estimates.  A year of new information,  which  is
     pertinent  to  the  estimation  of  future  recoverable  volumes,   is
     available during the subsequent year evaluation.

     In  applying industry standards and procedures, the new data may cause
     the  previous estimates to be revised.  This revision may increase  or
     decrease   the  earlier  estimated  volumes.   Pertinent   information
     gathered  during  the year may include actual production  and  decline
     rates,  production  from offset wells drilled  to  the  same  geologic
     formation,  increased  or decreased water production,  workovers,  and
     changes in lifting costs among others.  Accordingly, reserve estimates
     are  often  different  from the quantities of oil  and  gas  that  are
     ultimately recovered.

     The  Partnership has reserves which are classified as proved developed
     producing, proved developed non-producing and proved undeveloped.  All
     of  the proved reserves are included in the engineering reports  which
     evaluate the Partnership's present reserves.

     Because  the  Partnership does not engage in drilling activities,  the
     development  of proved undeveloped reserves is conducted  pursuant  to
     farmout  arrangements with the Managing General Partner  or  unrelated
     third  parties.  Generally, the Partnership retains a carried interest
     such  as  an overriding royalty interest under the terms of a farmout,
     or receives cash.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

7.   Estimated Oil & Gas Reserves (unaudited) - continued
     The  standardized measure of discounted future net cash flows relating
     to  proved oil and gas reserves at December 31, 2001, 2000 and 1999 is
     presented below:

                                              2001       2000       1999
                                              ----       ----       ----

     Future cash inflows, net of
       production and development
      costs                             $    625,000  6,014,000 1,478,000
     10% annual discount for
      estimated timing of cash
      flows                                  207,000  2,793,000   589,000
                                           ---------  --------- ---------
     Standardized measure of
      discounted future net cash
      flows                             $    418,000  3,221,000   889,000
                                           =========  ========= =========

     The  principal  sources  of  change in  the  standardized  measure  of
     discounted  future  net cash flows for the years  ended  December  31,
     2001, 2000 and 1999 are as follows:

                                              2001        2000      1999
                                              ----        ----      ----

     Sales of oil and gas produced,
      net of production costs           $  (225,000)  (303,000) (188,000)
      Changes  in prices and production costs         (3,104,000) 2,174,000
241,000
     Changes of production rates
      (timing) and others                    507,000   (64,000)    17,000
     Revisions of previous
      quantities estimates                 (279,000)    436,000   401,000
     Accretion of discount                   322,000     89,000    38,000
     Discounted future net
      cash flows -
     Sales of minerals in place             (24,000)          -   (1,000)
      Beginning of year                    3,221,000    889,000   381,000
                                           ---------  --------- ---------
      End of year                       $    418,000  3,221,000   889,000
                                           =========  ========= =========

     Future  net cash flows were computed using year-end prices  and  costs
     that  related  to existing proved oil and gas reserves  in  which  the
     Partnership has mineral interests.


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements

8.  Selected Quarterly Financial Results - (unaudited)

                                                 Quarter
                              ----------------------------------------------
                                 First       Second    Third       Fourth
                                 ------     -------    ------      ------
  2001:
      Total  revenues           $  100,024     69,479       (1)      27,023
31,097
     Total expenses               19,747     25,448    33,967      20,128
     Net income (loss)            80,277     44,031   (6,944)      10,969
     Net income (loss) per limited
      partners unit                14.69       7.86     (1.78)       1.82

  2000:
     Total revenues           $   71,590     76,115    74,321      83,734
     Total expenses               21,019     11,985    17,109       5,661
     Net income                   50,571     64,130    57,212      78,073
     Net income per limited
      partners unit                 9.16      11.86     10.47       14.55

(1) Due to a clerical error total revenues and net income differ by $14,492
from  amounts previously reported in the Form 10-Q for June 30, 2001.   The
previously reported six-month amounts were unaffected.


Item 9.   Changes  in and Disagreements With Accountants on Accounting  and
          Financial Disclosure

None


                                 Part III

Item 10.  Directors and Executive Officers of the Registrant

Management of the Partnership is provided by Southwest Royalties, Inc.,  as
Managing  General Partner.  The names, ages, offices, positions and  length
of  service of the directors and executive officers of Southwest Royalties,
Inc. are set forth below.  Each director and executive officer serves for a
term  of  one year.  The present directors of the Managing General  Partner
have served in their capacity since the Company's formation in 1983.

Name                        Age         Position
- --------------------        ---         -----------------------------------
- --
H. H. Wommack, III                      46     Chairman   of   the   Board,
                                        President,
                                        Chief Executive Officer, Treasurer
                                        and Director

H. Allen Corey              45          Secretary and Director

Bill E. Coggin                          47     Vice  President  and   Chief
                                        Financial Officer

J. Steven Person            43          Vice President, Marketing

Paul L. Morris              60          Director

H.  H.  Wommack, III, is Chairman of the Board, President, Chief  Executive
Officer,  Treasurer, principal stockholder and a director of  the  Managing
General  Partner,  and  has  served as its President  since  the  Company's
organization  in August, 1983.  Prior to the formation of the Company,  Mr.
Wommack  was  a  self-employed  independent oil  producer  engaged  in  the
purchase  and sale of royalty and working interests in oil and gas  leases,
and  the drilling of exploratory and developmental oil and gas wells.   Mr.
Wommack  holds  a J.D. degree from the University of Texas  from  which  he
graduated  in  1980, and a B.A. from the University of  North  Carolina  in
1977.

H.  Allen  Corey, a founder of the Managing General Partner, has served  as
the   Managing  General  Partner's  secretary  and  a  director  since  its
inception.   Mr. Corey is President of Trolley Barn Brewery, Inc.,  a  brew
pub restaurant chain based in the Southeast.  Prior to his involvement with
Trolley Barn, Mr. Corey was a partner at the law firm of Miller & Martin in
Chattanooga,  Tennessee.  He is currently of counsel to  the  law  firm  of
Baker,  Donelson,  Bearman  & Caldwell, with the  offices  in  Chattanooga,
Tennessee.  Mr. Corey received a J.D. degree from the Vanderbilt University
Law  School and B.A. degree from the University of North Carolina at Chapel
Hill.

Bill  E. Coggin, Vice President and Chief Financial Officer, has been  with
the Managing General Partner since 1985.  Mr. Coggin was Controller for Rod
Ric  Corporation of Midland, Texas, an oil and gas drilling company, during
the latter part of 1984.  He was Controller for C.F. Lawrence & Associates,
Inc., an independent oil and gas operator also of Midland, Texas during the
early  part of 1984.  Mr. Coggin taught public school for four years  prior
to his business experience.  Mr. Coggin received a B.S. in Education and  a
B.B.A. in Accounting from Angelo State University.

J.  Steven  Person, Vice President, Marketing, assumed his responsibilities
with  the Managing General Partner as National Marketing Director in  1989.
Prior  to joining the Managing General Partner, Mr. Person served  as  Vice
President  of  Marketing  for CRI, Inc., and was  associated  with  Capital
Financial  Group and Dean Witter (1983).  He received a B.B.A. from  Baylor
University in 1982 and an M.B.A. from Houston Baptist University in 1987.

Paul  L.  Morris has served as a Director of Southwest Royalties  Holdings,
Inc.  since August 1998 and Southwest Royalties, Inc. since September 1998.
Mr. Morris is President and CEO of Wagner & Brown, Ltd., one of the largest
independently owned oil and gas companies in the United States.   Prior  to
his  position with Wagner & Brown, Mr. Morris served as President of Banner
Energy  and  in various managerial positions with the Columbia Gas  System,
Inc.



Key Employees

Jon  P. Tate, Vice President, Land and Assistant Secretary, age 44, assumed
his  responsibilities with the Managing General Partner in 1989.  Prior  to
joining  the  Managing  General Partner, Mr.  Tate  was  employed  by  C.F.
Lawrence  & Associates, Inc., an independent oil and gas company,  as  Land
Manager from 1981 through 1989.  Mr. Tate is a member of the Permian  Basin
Landman's  Association and American Association of Petroleum Landmen.   Mr.
Tate received his B.B.S. degree from Hardin-Simmons University.

R.  Douglas  Keathley,  Vice President, Operations,  age  46,  assumed  his
responsibilities with the Managing General Partner as a Production Engineer
in  October,  1992.   Prior to joining the Managing  General  Partner,  Mr.
Keathley  was  employed for four (4) years by ARCO Oil  &  Gas  Company  as
senior  drilling  engineer working in all phases of well production  (1988-
1992),  eight  (8)  years by Reading & Bates Petroleum  Company  as  senior
petroleum  engineer responsible for drilling (1980-1988) and two (2)  years
by  Tenneco Oil Company as drilling engineer responsible for all phases  of
drilling   (1978-1980).   Mr.  Keathley  received  his  B.S.  in  Petroleum
Engineering in 1977 from the University of Oklahoma.

In certain instances, the Managing General Partner will engage professional
petroleum   consultants   and  other  independent  contractors,   including
engineers   and   geologists  in  connection  with  property  acquisitions,
geological  and  geophysical  analysis,  and  reservoir  engineering.   The
Managing  General Partner believes that, in addition to its own  "in-house"
staff,  the utilization of such consultants and independent contractors  in
specific  instances  and  on  an  "as-needed"  basis  allows  for   greater
flexibility  and greater opportunity to perform its oil and gas  activities
more economically and effectively.

Item 11.  Executive Compensation

The  Partnership  does not have any directors or executive  officers.   The
executive officers of the Managing General Partner do not receive any  cash
compensation,  bonuses, deferred compensation or compensation  pursuant  to
any  type  of  plan,  from the Partnership.  The Managing  General  Partner
received  $34,800 in 2001 and 2000 and $36,000 during 1999,  as  an  annual
administrative fee.

Item 12.  Security Ownership of Certain Beneficial Owners and Management

There  are  no  limited partners who own of record, or  are  known  by  the
Managing General Partner to beneficially own, more than five percent of the
Partnership's limited partnership interests.

The   Managing  General  Partner  owns  a  nine  percent  interest  in  the
Partnership as a general partner.

No  officer or director of the Managing General Partner owns Units  in  the
Partnership.  H. H. Wommack, III, as the individual general partner of  the
Partnership, owns a one percent interest as a general partner.   There  are
no  arrangements  known  to the Managing General Partner  which  may  at  a
subsequent date result in a change of control of the Partnership.


Item 13.  Certain Relationships and Related Transactions

In 2001, the Managing General Partner received $34,800 as an administrative
fee.   This  amount  is  part  of the general and  administrative  expenses
incurred by the Partnership.

In  some  instances the Managing General Partner and certain  officers  and
employees  may  be working interest owners in an oil and  gas  property  in
which  the Partnership also has a working interest.  Certain properties  in
which  the Partnership has an interest are operated by the Managing General
Partner,  who  was  paid approximately $56,800 for administrative  overhead
attributable to operating such properties during 2001.

Certain  subsidiaries or affiliates of the Managing General Partner perform
various  oilfield services for properties in which the Partnership owns  an
interest.  Such services aggregated approximately $4,100 for the year ended
December 31, 2001.

In  the  opinion  of  management, the terms of the above  transactions  are
similar to ones with unaffiliated third parties.
                                 Part IV


Item 14.  Exhibits, Financial Statement Schedules and Reports on Form 8-K

          (a)(1)  Financial Statements:

                  Included in Part II of this report --
                  Independent Auditors Report
                  Balance Sheet
                  Statement of Operations
                  Statement of Changes in Partners' Equity
                  Statement of Cash Flows
                  Notes to Financial Statements

                     (2)  Schedules required by Article 12 of Regulation S-
                  X  are either omitted because they are not applicable  or
                  because  the  required  information  is  shown   in   the
                  financial statements or the notes thereto.

             (3)  Exhibits:

                                      4      (a)   Certificate  of  Limited
                          Partnership  of Southwest Royalties Institutional
                          Income  Fund XI-B, L.P., dated August  24,  1993.
                          (Incorporated  by  reference  from  Partnership's
                          Form 10-K for the fiscal year ended December  31,
                          1993).

                                            (b)    Agreement   of   Limited
                          Partnership  of Southwest Royalties Institutional
                          Income  Fund XI-B, L.P., dated August  27,  1993.
                          (Incorporated  by  reference  from  Partnership's
                          Form 10-K for the fiscal year ended December  31,
                          1993).

          (b)     Reports on Form 8-K

                  There  were  no  reports filed on  Form  8-K  during  the
              quarter ended December 31, 2001.


                                Signatures


Pursuant  to  the  requirements of Section 13 or 15(d)  of  the  Securities
Exchange  Act  of 1934, the Partnership has duly caused this report  to  be
signed on its behalf by the undersigned, thereunto duly authorized.


                          Southwest Royalties Institutional Income
                          Fund XI-B, L.P., a Delaware limited partnership


                                        By:    Southwest  Royalties,  Inc.,
                                 Managing
                                 General Partner


                          By:    /s/ H. H. Wommack, III
                                 -----------------------------
                                           H. H. Wommack, III, President


                          Date:  March 29, 2002


Pursuant  to the requirements of the Securities Exchange Act of 1934,  this
report  has  been signed below by the following persons on  behalf  of  the
Partnership and in the capacities and on the dates indicated.


By:    /s/ H. H. Wommack, III
       -----------------------------------
       H. H. Wommack, III, Chairman of the
       Board, President, Chief Executive
       Officer, Treasurer and Director


Date:  March 29, 2002

By:    /s/ H. Allen Corey
       -----------------------------
       H. Allen Corey, Secretary and
       Director


Date:  March 29, 2002