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                                FORM 10-Q


                    SECURITIES AND EXCHANGE COMMISSION
                         WASHINGTON, D.C.  20549

(MARK ONE)

(X)  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
     OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 1998

                                    OR

(  ) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
     OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ________________ to ________________

Commission File Number 33-47668-02

         SOUTHWEST ROYALTIES INSTITUTIONAL 1992-93 INCOME PROGRAM
         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 of                (I.R.S. Employer
incorporation or organization)                Identification No.)


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

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

Indicate  by  check  mark  whether registrant (1)  has  filed  all  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

        The total number of pages contained in this report is 14.


                     PART I. - FINANCIAL INFORMATION


Item 1. Financial Statements

The  unaudited  condensed financial statements included  herein  have  been
prepared  by  the Registrant (herein also referred to as the "Partnership")
in  accordance  with generally accepted accounting principles  for  interim
financial information and with the instructions to Form 10-Q and Rule 10-01
of Regulation S-X.  Accordingly, they do not include all of the information
and  footnotes  required  by generally accepted accounting  principles  for
complete   financial  statements.   In  the  opinion  of  management,   all
adjustments necessary for a fair presentation have been included and are of
a  normal  recurring nature.  The financial statements should  be  read  in
conjunction with the audited financial statements and the notes thereto for
the  year ended December 31, 1997 which are found in the Registrant's  Form
10-K  Report  for  1997 filed with the Securities and Exchange  Commission.
The December 31, 1997 balance sheet included herein has been taken from the
Registrant's  1997 Form 10-K Report.  Operating results for the  three  and
six month periods ended June 30, 1998 are not necessarily indicative of the
results that may be expected for the full year.


         Southwest Royalties Institutional Income Fund XI-B, L.P.

                              Balance Sheets


                                                 June 30,      December 31,
                                                   1998            1997
                                                ---------      ------------
                                               (unaudited)
  Assets

Current assets:
 Cash and cash equivalents                   $      3,481           4,948
 Receivable from Managing General Partner               -          54,454
 Other receivable                                  10,063          51,887
                                                ---------       ---------
    Total current assets                           13,544         111,289
                                                ---------       ---------
Oil and gas properties - using the
 full cost method of accounting                 2,008,049       2,008,569
  Less accumulated depreciation,
   depletion and amortization                   1,318,567       1,217,154
                                                ---------       ---------
    Net oil and gas properties                    689,482         791,415
                                                ---------       ---------
Organization costs, net of amortization             3,202           6,922
                                                ---------       ---------
                                             $    706,228         909,626
                                                =========       =========

  Liabilities and Partners' Equity

Current liabilities:
 Distribution payable                        $         43               6
 Payable to Managing General Partner               28,638               -
                                                ---------       ---------
    Total current liabilities                      28,681               6
                                                ---------       ---------
Partner equity:
 General partners                                 (1,416)          11,278
 Limited partners                                 678,963         898,342
                                                ---------       ---------
    Total partners' equity                        677,547         909,620
                                                ---------       ---------
                                             $    706,228         909,626
                                                =========       =========


         Southwest Royalties Institutional Income Fund XI-B, L.P.

                         Statements of Operations
                               (unaudited)


                                 Three Months Ended      Six Months Ended
                                       June 30,              June 30,
                                    1998      1997        1998      1997
  Revenues

Income (loss) from net profits
 interests                    $  (17,019)     38,364     16,045    109,323
Interest income from
 operations                           266        241        428        464
Miscellaneous income                    -     13,553          -     19,906
                                  -------    -------    -------    -------
                                 (16,753)     52,158     16,473    129,693
                                  -------    -------    -------    -------

  Expenses

General and administrative         12,787     11,013     30,818     28,105
Depreciation, depletion and
 amortization                      20,360     29,860     47,220     67,720
Provision for impairment oil
 and gas properties                57,913          -     57,913          -
Miscellaneous expense              52,707          -     55,095          -
                                  -------    -------    -------    -------
                                  143,767     40,873    191,046     95,825
                                  -------    -------    -------    -------
Net income (loss)             $ (160,520)     11,285  (174,573)     33,868
                                  =======    =======    =======    =======
Net income (loss) allocated to:

 Managing General Partner     $   (7,402)      3,703    (6,250)      9,143
                                  =======    =======    =======    =======
 General Partner              $     (823)        411      (694)      1,016
                                  =======    =======    =======    =======
 Limited partners             $ (152,295)      7,171  (167,629)     23,709
                                  =======    =======    =======    =======
  Per limited partner unit    $   (31.39)       1.48    (34.56)       4.89
                                  =======    =======    =======    =======


         Southwest Royalties Institutional Income Fund XI-B, L.P.

                         Statements of Cash Flows
                               (unaudited)


                                                        Six Months Ended
                                                             June 30,
                                                          1998      1997

Cash flows from operating activities:

 Cash received from oil and gas sales               $    59,045    170,684
 Cash paid to suppliers                                 (3,997)   (28,052)
 Interest received                                          428        464
                                                        -------   --------
  Net cash provided by operating activities              55,476    143,096
                                                        -------   --------
Cash flows from investing activities:
 Cash proceeds from sale of oil and gas properties          520          -
                                                        -------   --------
Cash flows used in financing activities:

 Distributions to partners                             (57,463)  (161,924)
                                                        -------   --------

Net decrease in cash and cash equivalents               (1,467)   (18,828)

 Beginning of period                                      4,948     20,225
                                                        -------   --------
 End of period                                      $     3,481      1,397
                                                        =======   ========

                                                               (continued)


         Southwest Royalties Institutional Income Fund XI-B, L.P.
                   Statements of Cash Flows, continued
                               (unaudited)


                                                        Six Months Ended
                                                             June 30,
                                                          1998      1997

Reconciliation of net income (loss) to net
 cash provided by operating activities:

Net income (loss)                                   $ (174,573)     33,868

Adjustments to reconcile net income (loss) to
 net cash provided by operating activities:

  Depreciation, depletion and amortization               47,220     67,720
  Provision for impairment for oil and gas
   properties                                            57,913          -
  Decrease in receivables                                43,000     41,455
  Increase in payables                                   81,916         53
                                                        -------    -------
Net cash provided by operating activities           $    55,476    143,096
                                                        =======    =======


Item 2.   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  such
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, with the offering of limited partnership interests
concluding  August  20, 1994, with total limited partner  contributions  of
$2,425,500.

The Partnership was formed to acquire royalty and net profits 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 farm-out arrangements, sales of properties, and the  depletion
of  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 partners  is
therefore expected to fluctuate in later years based on these factors.

Based  on  current  conditions, management does not  anticipate  performing
workovers  during  the year.  The Partnership could possibly  experience  a
slight  increase during that time and thereafter, could possibly experience
a normal decline.

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.

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. The Partnership reduced the net capitalized costs  of  oil
and  gas  properties  in the quarter ended June 30, 1998  by  approximately
$57,913.  The write-down has the effect of reducing net income, but did not
affect cash flow or partner distributions.  A continuation of the oil price
environment experienced during the first half of 1998 will have an  adverse
affect  on  the Company's revenues and operating cash flow.  Also,  further
declines in oil prices could result in additional decreases in the carrying
value of the Company's oil and gas properties.



Results of Operations

A.  General Comparison of the Quarters Ended June 30, 1998 and 1997

The  following  table  provides certain information  regarding  performance
factors for the quarters ended June 30, 1998 and 1997:

                                               Three Months
                                                  Ended          Percentage
                                                 June 30,         Increase
                                              1998       1997    (Decrease)
                                              ----       ----    ----------

Average price per barrel of oil         $     12.29     18.32     (33%)
Average price per mcf of gas            $      1.59      2.01     (21%)
Oil production in barrels                     2,500     2,900     (14%)
Gas production in mcf                        21,500    27,000     (20%)
Income from net profits interests       $  (17,019)    38,364    (144%)
Partnership distributions               $    24,000    67,500     (64%)
Limited partner distributions           $    21,600    60,750     (64%)
Per unit distribution to limited
 partners                               $      4.45     12.52     (64%)
Number of limited partner units               4,851     4,851

Revenues

The  Partnership's income from net profits interests decreased to $(17,019)
from $38,364 for the quarters ended June 30, 1998 and 1997, respectively, a
decrease  of 144%.  The principal factors affecting the comparison  of  the
quarters ended June 30, 1998 and 1997 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased  during the quarter ended June 30, 1998 as  compared  to  the
    quarter ended June 30, 1997 by 33%, or $6.03 per barrel, resulting in a
    decrease of approximately $17,500 in income from net profits interests.
    Oil sales represented 69% of total oil and gas sales during the quarter
    ended  June  30, 1998 as compared to 49% during the quarter ended  June
    30, 1997.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 21%, or $.42 per mcf, resulting  in
    a  decrease  of  approximately  $11,340  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
    $28,840.   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 400 barrels or 14%  during  the
    quarter  ended June 30, 1998 as compared to the quarter ended June  30,
    1997,  resulting in a decrease of approximately $4,900 in  income  from
    net profits interests.

    Gas production decreased approximately 5,500 mcf or 20% during the same
    period, resulting in a decrease of approximately $8,700 in income  from
    net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in  production  is  approximately  $13,600.   The  decrease  is
    primarily  attributable to the sharp natural decline on two leases  and
    downtime, due to mechanical problems.

3.  Lease  operating  costs  and  production  taxes  were  11%  lower,   or
    approximately  $7,400 less during the quarter ended June  30,  1998  as
    compared to the quarter ended June 30, 1997.  The decrease is primarily
    attributable to repairs on a salt water disposal well during the second
    quarter of 1997.

Costs and Expenses

Total  costs  and  expenses  increased to $143,767  from  $40,873  for  the
quarters  ended June 30, 1998 and 1997, respectively, an increase of  252%.
The  increase  is  the  result  of higher depletion  expense,  general  and
administrative expense, and miscellaneous expense.

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
    16%  or approximately $1,770 during the quarter ended June 30, 1998  as
    compared to the quarter ended June 30, 1997.

2.    Depletion expense decreased to $18,500 for the quarter ended June 30,
   1998 from $28,000 for the same period in 1997.  This represents a decrease
   of  34%.   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.  Contributing factors to the decrease in
   depletion  expense between the comparative periods were the decrease  in
   gross oil and gas revenues and the decrease in the price of oil used  to
   determine the Partnership's reserves for January 1, 1998 as compared  to
   1997.  The Partnership reduced the net capitalized costs of oil and  gas
   properties in the quarter ended June 30, 1998 by approximately  $57,913.
   The write-down has the effect of reducing net income, but did not affect
   cash flow or partner distributions.

3.    The  Partnership entered into a purchase agreement on  the  Tar  Baby
   lease  that  guaranteed net income each month from October 1994  through
   January  1998.   This income was recorded on the Partnerships  books  as
   miscellaneous income.  Based on new information obtained in May 1998, an
   adjustment  of  $52,707 was found to be necessary.  This adjustment  was
   recorded as miscellaneous expense on the Partnerships books for the quarter
   ended June 30, 1998.


B.  General  Comparison of the Six Month Periods Ended June  30,  1998  and
    1997

The  following  table  provides certain information  regarding  performance
factors for the six month periods ended June 30, 1998 and 1997:

                                                Six Months
                                                  Ended          Percentage
                                                 June 30,         Increase
                                              1998       1997    (Decrease)
                                              ----       ----    ----------

Average price per barrel of oil         $     12.22     20.92     (42%)
Average price per mcf of gas            $      1.59      2.20     (28%)
Oil production in barrels                     5,300     6,100     (13%)
Gas production in mcf                        41,600    54,000     (23%)
Income from net profits interests       $    16,045   109,323     (85%)
Partnership distributions               $    57,500   162,000     (65%)
Limited partner distributions           $    51,750   145,800     (65%)
Per unit distribution to limited
 partners                               $     10.67     30.06     (65%)
Number of limited partner units               4,851     4,851

Revenues

The  Partnership's income from net profits interests decreased  to  $16,045
from   $109,323  for  the  six  months  ended  June  30,  1998  and   1997,
respectively,  a  decrease  of 85%.  The principal  factors  affecting  the
comparison of the six months ended June 30, 1998 and 1997 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased during the six months ended June 30, 1998 as compared to  the
    six  months ended June 30, 1997 by 42%, or $8.70 per barrel,  resulting
    in  a  decrease  of  approximately $53,070 in income from  net  profits
    interests.  Oil sales represented 49% of total oil and gas sales during
    the  six  months ended June 30, 1998 as compared to 52% during the  six
    months ended June 30, 1997.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 28%, or $.61 per mcf, resulting  in
    a  decrease  of  approximately  $32,940  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
    $86,010.   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 800 barrels or 13%  during  the
    six months ended June 30, 1998 as compared to the six months ended June
    30,  1997,  resulting in a decrease of approximately $9,770  in  income
    from net profits interests.

    Gas  production  decreased approximately 12,400 mcf or 23%  during  the
    same period, resulting in a decrease of approximately $19,700 in income
    from net profits interests.

    The  total  decrease in income from net profits interests  due  to  the
    change  in  production  is  approximately  $29,470.   The  decrease  is
    primarily  attributable to the sharp natural decline on two leases  and
    downtime, due to mechanical problems.

3.  Lease  operating  costs  and  production  taxes  were  16%  lower,   or
    approximately $22,200 less during the six months ended June 30, 1998 as
    compared to the six months ended June 30, 1997.

Costs and Expenses

Total  costs  and expenses increased to $191,046 from $95,825 for  the  six
months ended June 30, 1998 and 1997, respectively, an increase of 99%.  The
increase  is  the result of higher general and administrative  expense  and
miscellaneous expense.

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
    10%  or approximately $2,700 during the six months ended June 30,  1998
    as compared to the six months ended June 30, 1997.

2.    Depletion expense decreased to $43,500 for the six months ended  June
   30,  1998  from $64,000 for the same period in 1997.  This represents  a
   decrease of 32%.  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.  Contributing factors to the decline in
   depletion  expense between the comparative periods were the decrease  in
   gross oil and gas revenues and the decrease in the price of oil used  to
   determine the Partnership's reserves for January 1, 1998 as compared  to
   1997.  The Partnership reduced the net capitalized costs of oil and  gas
   properties in the quarter ended June 30, 1998 by approximately  $57,913.
   The write-down has the effect of reducing net income, but did not affect
   cash flow or partner distributions.

3.    The  Partnership entered into a purchase agreement on  the  Tar  Baby
   lease  that  guaranteed net income each month from October 1994  through
   January  1998.   The  income was recorded on the Partnerships  books  as
   miscellaneous income.  Based on new information obtained in May 1998, an
   adjustment  of  $52,707 was found to be necessary.  This adjustment  was
   recorded as miscellaneous expense on the Partnerships books for the  six
   months ended June 30, 1998.


Liquidity and Capital Resources

The  primary source of cash is from operations, the receipt of income  from
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 $55,500  in
the six months ended June 30, 1998 as compared to approximately $143,100 in
the  six  months ended June 30, 1997.  The primary source of the 1998  cash
flow from operating activities was profitable operations.

Cash flows provided by investing activities were approximately $520 in  the
six  months  ended  June 30, 1998.  There were no cash  flows  provided  by
investing activities in the six months ended June 30, 1997.  The source for
the cash flows were sale of oil and gas properties.

Cash  flows used in financing activities were approximately $57,500 in  the
six months ended June 30, 1998 as compared to approximately $161,900 in the
six  months ended June 30, 1997.  The only use in financing activities  was
the distributions to partners.

Total  distributions during the six months ended June 30, 1998 were $57,500
of  which $51,750 was distributed to the limited partners and $5,750 to the
general partners.  The per unit distribution to limited partners during the
six  months ended June 30, 1998 was $10.67.  Total distributions during the
six  months  ended  June  30,  1997 were $162,000  of  which  $145,800  was
distributed  to  the limited partners and $16,200 to the general  partners.
The  per unit distribution to limited partners during the six months  ended
June 30, 1997 was $30.06.

The  source  for  the  1998  distributions of  $57,500  were  oil  and  gas
operations of approximately $55,500.  The source for the 1997 distributions
of  $162,000 was oil and gas operations of approximately $143,100, with the
balance from available cash on hand at the beginning of the period.

Since  inception of the Partnership, cumulative monthly cash  distributions
of  $988,439 have been made to the partners.  As of June 30, 1998, $903,453
or  $186.24  per limited partner unit has been distributed to  the  limited
partners, representing a 37% return of the capital contributed.

As of June 30, 1998, the Partnership had approximately $(15,100) in working
capital.   The  Managing  General Partner knows of no  unusual  contractual
commitments  and  believes  the  revenues  generated  from  operations  are
adequate to meet the needs of the Partnership.

Information Systems for the Year 2000

The  Managing  General Partner provides all data processing  needs  of  the
Partnership.   The Managing General Partner has reviewed and evaluated  its
information  systems  to determine if its systems accurately  process  data
referencing   the   year   2000.   Primarily  all   necessary   programming
modifications  to  correct year 2000 referencing in  the  Managing  General
Partners  internal accounting and operating systems have been made to-date.
However  the  Managing General Partner has not completed its evaluation  of
its vendors and suppliers systems to determine the effect, if any, the non-
compliance  of  such systems would have on the operation  of  the  Managing
General Partnership or the operations of the Partnership.



                       PART II. - OTHER INFORMATION


Item 1.    Legal Proceedings

           None

Item 2.    Changes in Securities

           None

Item 3.    Defaults Upon Senior Securities

           None

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

           None

Item 5.    Other Information

           None

Item 6.    Exhibits and Reports on Form 8-K

              (a)                                     Exhibits:

               27 Financial Data Schedule

          (b) Reports on Form 8-K:

               No reports on Form 8-
               K were filed during the quarter ended June 30, 1998.


                                SIGNATURES


Pursuant  to the requirements of the Securities Exchange Act of  1934,  the
registrant  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/ Bill E. Coggin
                                       Bill E. Coggin, Vice
                                       President
                                       and Chief Financial Officer

Date:  August 15, 1998