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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, 2002

                                    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 0-19585


                SOUTHWEST OIL & GAS 1990-91 INCOME PROGRAM
                Southwest Oil & Gas Income Fund X-B, L.P.
                  (Exact name of registrant as specified
                  in its limited partnership agreement)

Delaware                                    75-2332176
(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 16.


                     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, 2001 which are found in the Registrant's  Form
10-K  Report  for  2001 filed with the Securities and Exchange  Commission.
The December 31, 2001 balance sheet included herein has been taken from the
Registrant's  2001 Form 10-K Report.  Operating results for the  three  and
six month periods ended June 30, 2002 are not necessarily indicative of the
results that may be expected for the full year.


                Southwest Oil & Gas Income Fund X-B, L.P.

                              Balance Sheets


                                                    June 30,    December 31,
                                                      2002          2001
                                                   ---------    ------------
                                                  (unaudited)

  Assets
  ------

Current assets:
 Cash and cash equivalents                   $        10,774       13,190
 Receivable from Managing General Partner             70,350       39,827

- ---------                                    ---------
                                                 Total    current    assets
81,124                                       53,017

- ---------                                    ---------
Oil and gas properties - using the full-
 cost method of accounting                         4,470,138    4,459,997
  Less accumulated depreciation,
                                               depletion  and  amortization
4,166,706                                    4,149,706

- ---------                                    ---------
                                              Net  oil  and gas  properties
303,432                                      310,291

- ---------                                    ---------
                                                                          $
384,556                                      363,308

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

Current liability - distribution payable     $           373          373

- ---------                                    ---------
Partners' equity:
 General partners                                    (2,394)      (6,219)
 Limited partners                                    386,577      369,154

- ---------                                    ---------
                                                Total    partners'   equity
384,183                                      362,935

- ---------                                    ---------
                                                                          $
384,556                                      363,308

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


                Southwest Oil & Gas Income Fund X-B, L.P.

                         Statements of Operations
                               (unaudited)


                                 Three Months Ended      Six Months Ended
                                       June 30,              June 30,
                                    2002      2001        2002      2001
                                   -----     -----       -----     -----

  Revenues
  --------
Oil and gas                   $   188,881    249,303    346,059    526,481
Interest                               11        891         52      2,119
                                  -------    -------    -------    -------
                                  188,892    250,194    346,111    528,600
                                  -------    -------    -------    -------

  Expenses
  --------
Production                        134,141    140,418    269,250    278,494
General and administrative         19,280     19,564     38,613     38,819
Depreciation, depletion and
 amortization                      10,000     14,000     17,000     24,000
                                  -------    -------    -------    -------
                                  163,421    173,982    324,863    341,313
                                  -------    -------    -------    -------
Net income                    $    25,471     76,212     21,248    187,287
                                  =======    =======    =======    =======
Net income allocated to:

 Managing General Partner     $     3,192      8,119      3,442     19,016
                                  =======    =======    =======    =======
 General Partner              $       355        902        383      2,113
                                  =======    =======    =======    =======
 Limited partners             $    21,924     67,191     17,423    166,158
                                  =======    =======    =======    =======
  Per limited partner unit    $     2.01       6.17        1.60      15.26
                                  =======    =======    =======    =======


                Southwest Oil & Gas Income Fund X-B, L.P.

                         Statements of Cash Flows
                               (unaudited)


                                                        Six Months Ended
                                                             June 30,
                                                          2002      2001
                                                         -----     -----

Cash flows from operating activities:

 Cash from oil and gas sales                        $   318,994    552,644
 Cash paid to suppliers                               (311,321)  (329,503)
 Interest received                                           52      2,119
                                                        -------    -------
  Net cash provided by operating activities               7,725    225,260
                                                        -------    -------
Cash flows used in investing activities:

 Additions to oil and gas properties                   (10,141)   (29,346)
                                                        -------    -------
Cash flows used in financing activities:

 Distributions to partners                                    -  (252,017)
                                                        -------    -------
Net decrease in cash and cash
 equivalents                                            (2,416)   (56,103)

 Beginning of period                                     13,190     92,659
                                                        -------    -------
 End of period                                      $    10,774     36,556
                                                        =======    =======
Reconciliation of net income to net
 cash provided by operating activities:

Net income                                          $    21,248    187,287

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

  Depreciation, depletion and amortization               17,000     24,000
  (Increase) decrease in receivables                   (27,065)     26,163
  Decrease in payables                                  (3,458)   (12,190)
  -------                                    -------
Net cash provided by operating activities           $     7,725    225,260
                                                        =======    =======


                Southwest Oil & Gas Income Fund X-B, L.P.
                     (a Delaware limited partnership)

                      Notes to Financial Statements


1.   Organization
     Southwest Oil & Gas Income Fund X-B, L.P. was organized under the laws
     of  the  state  of Delaware on November 27, 1990 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  sells  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.  Revenues, costs  and  expenses  are
     allocated as follows:

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

     Interest income on capital contributions        100%           -
     Oil and gas sales                                90%          10%
     All other revenues                               90%          10%
     Organization and offering costs (1)             100%           -
     Amortization or organization costs              100%           -
     Property acquisition costs                      100%           -
     Gain/loss on property disposition                90%          10%
     Operating and administrative costs (2)           90%          10%
     Depreciation, depletion, and amortization
      of oil and gas properties                      100%           -
     All other costs                                  90%          10%

          (1)   All  organization costs in excess of 3% of initial  capital
          contributions  will be paid by the Managing General  Partner  and
          will  be treated as a capital contribution.  The Partnership paid
          the  Managing  General Partner an amount equal to 3%  of  initial
          capital contributions for such organization costs.

          (2)   Administrative costs in any year which exceed 2% of capital
          contributions shall be paid by the Managing General  Partner  and
          will be treated as a capital contribution.

2.   Summary of Significant Accounting Policies
     The  interim  financial information as of June 30, 2002, and  for  the
     three  and  six  months  ended June 30, 2002, is  unaudited.   Certain
     information  and footnote disclosures normally included  in  financial
     statements  prepared in accordance with generally accepted  accounting
     principles  have been condensed or omitted in this Form 10-Q  pursuant
     to   the   rules  and  regulations  of  the  Securities  and  Exchange
     Commission.  However,  in  the opinion of  management,  these  interim
     financial  statements include all the necessary adjustments to  fairly
     present  the  results of the interim periods and all such  adjustments
     are  of a normal recurring nature.  The interim consolidated financial
     statements  should  be read in conjunction with the audited  financial
     statements for the year ended December 31, 2001.


Item 2.   Management's  Discussion and Analysis of Financial Condition  and
          Results of Operations

General

Southwest  Oil  &  Gas Income Fund X-B, L.P. was organized  as  a  Delaware
limited  partnership  on November 27, 1990. The offering  of  such  limited
partnership interests began on December 1, 1990 as part of a shelf offering
registered  under  the  name Southwest Oil & Gas  1990-91  Income  Program.
Minimum capital requirements for the Partnership were met on March 1, 1991,
with  the offering of limited partnership interests concluding on September
30, 1991, with total limited partner contributions of $5,444,500.

The  Partnership was formed to acquire interests in producing oil  and  gas
properties,  to produce and market crude oil and natural gas produced  from
such properties, and to distribute the net proceeds from operations to  the
limited  and  general partners.  Net revenues from producing  oil  and  gas
properties will not be reinvested in other revenue producing assets  except
to the extent that production facilities and wells are improved or reworked
or  where methods are employed to improve or enable more efficient recovery
of oil and gas reserves.

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, 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 anticipates performing no workovers
during  2002  to  enhance  production.  The partnership  will  most  likely
experience the historical production decline of approximately 9% per year.

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.  As of June 30, 2002, the net capitalized costs  did  not
exceed the estimated present value of the Partnership's 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.



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 Quarters Ended June 30, 2002 and 2001

The  following  table  provides certain information  regarding  performance
factors for the quarters ended June 30, 2002 and 2001:

                                               Three Months
                                                  Ended          Percentage
                                                 June 30,         Increase
                                              2002       2001    (Decrease)
                                              ----       ----    ----------

Average price per barrel of oil          $    23.22     24.70       (6%)
Average price per mcf of gas             $     2.87      4.06      (29%)
Oil production in barrels                     6,900     7,900      (13%)
Gas production in mcf                        10,000    13,400      (25%)
Gross oil and gas revenue                $  188,881   249,303      (24%)
Net oil and gas revenue                  $   54,740   108,885      (50%)
Partnership distributions                $        -   100,000     (100%)
Limited partner distributions            $        -    90,000     (100%)
Per unit distribution to limited
 partners                                $        -      8.27     (100%)
Number of limited partner units              10,889    10,889

Revenues

The  Partnership's oil and gas revenues decreased to $188,881 from $249,303
for the quarters ended June 30, 2002 and 2001, respectively, a decrease  of
24%.   The principal factors affecting the comparison of the quarters ended
June 30, 2002 and 2001 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased  during the quarter ended June 30, 2002 as  compared  to  the
    quarter ended June 30, 2001 by 6%, or $1.48 per barrel, resulting in  a
    decrease  of  approximately $10,200 in revenues.  Oil sales represented
    85%  of total oil and gas sales during the quarter ended June 30,  2002
    as compared to 78% during the quarter ended June 30, 2001.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 29%, or $1.19 per mcf, resulting in
    a decrease of approximately $11,900 in revenues.

    The  total  decrease in revenues due to the change in  prices  received
    from oil and gas production is approximately $22,100.  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 1,000 barrels or 13% during the
    quarter  ended June 30, 2002 as compared to the quarter ended June  30,
    2001, resulting in a decrease of approximately $24,700 in revenues.

    Gas production decreased approximately 3,400 mcf or 25% during the same
    period, resulting in a decrease of approximately $13,800 in revenues.

    The  total  decrease  in revenues due to the change  in  production  is
    approximately $38,500.  The decrease in gas production is primarily due
    to  one  lease experiencing a steep natural decline during the  quarter
    ended June 30, 2002.


Costs and Expenses

Total  costs  and  expenses decreased to $163,421  from  $173,982  for  the
quarters ended June 30, 2002 and 2001, respectively, a decrease of 6%.  The
decrease  is  the result of lower lease operating costs, depletion  expense
and general and administrative expense.

1.  Lease   operating  costs  and  production  taxes  were  4%  lower,   or
    approximately  $6,300 less during the quarter ended June  30,  2002  as
    compared to the quarter ended June 30, 2001.

2.  General and administrative costs consist of independent accounting  and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner personnel costs.  General and administrative costs decreased 1%
    or  approximately  $300  during the quarter  ended  June  30,  2002  as
    compared to the quarter ended June 30, 2001.

3.  Depletion expense decreased to $10,000 for the quarter ended  June  30,
    2002  from  $14,000  for the same period in 2001.   This  represents  a
    decrease  of 29%.  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 contributing
    factor  to  the  decrease in depletion expense between the  comparative
    periods  was  the  decrease  in oil and gas revenues  received  by  the
    Partnership during 2002 as compared to 2001.



B. General Comparison of the Six Month Periods Ended June 30, 2002 and 2001

The  following  table  provides certain information  regarding  performance
factors for the six month periods ended June 30, 2002 and 2001:

                                                Six Months
                                                  Ended          Percentage
                                                 June 30,         Increase
                                              2002       2001    (Decrease)
                                              ----       ----    ----------
Average price per barrel of oil          $    20.61     25.26      (18%)
Average price per mcf of gas             $     2.26      4.97      (55%)
Oil production in barrels                    14,400    15,900       (9%)
Gas production in mcf                        21,800    25,100      (13%)
Gross oil and gas revenue                $  346,059   526,481      (34%)
Net oil and gas revenue                  $   76,809   247,987      (69%)
Partnership distributions                $        -   252,000     (100%)
Limited partner distributions            $        -   226,800     (100%)
Per unit distribution to limited
 partners                                $        -     20.83     (100%)
Number of limited partner units              10,889    10,889

Revenues

The  Partnership's oil and gas revenues decreased to $346,059 from $526,481
for  the  six months ended June 30, 2002 and 2001, respectively, a decrease
of  34%.  The principal factors affecting the comparison of the six  months
ended June 30, 2002 and 2001 are as follows:

1.  The  average  price  for a barrel of oil received  by  the  Partnership
    decreased during the six months ended June 30, 2002 as compared to  the
    six  months ended June 30, 2001 by 18%, or $4.65 per barrel,  resulting
    in  a  decrease  of  approximately  $67,000  in  revenues.   Oil  sales
    represented 86% of total oil and gas sales during the six months  ended
    June  30, 2002 as compared to 76% during the six months ended June  30,
    2001.

    The  average  price  for  an  mcf of gas received  by  the  Partnership
    decreased during the same period by 55%, or $2.71 per mcf, resulting in
    a decrease of approximately $59,100 in revenues.

    The  total  decrease in revenues due to the change in  prices  received
    from  oil  and  gas production is approximately $126,100.   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 1,500 barrels or 9% during  the
    six months ended June 30, 2002 as compared to the six months ended June
    30, 2001, resulting in a decrease of approximately $37,900 in revenues.

    Gas production decreased approximately 3,300 mcf or 13% during the same
    period, resulting in a decrease of approximately $16,400 in revenues.

    The  total  decrease  in revenues due to the change  in  production  is
    approximately $54,300.

Costs and Expenses

Total  costs and expenses decreased to $324,863 from $341,313 for  the  six
months  ended June 30, 2002 and 2001, respectively, a decrease of 5%.   The
decrease  is  the result of lower depletion expense, lease operating  costs
and general and administrative expense.

1.  Lease   operating  costs  and  production  taxes  were  3%  lower,   or
    approximately $9,200 less during the six months ended June 30, 2002  as
    compared to the six months ended June 30, 2001.

2.  General and administrative costs consist of independent accounting  and
    engineering  fees,  computer services, postage,  and  Managing  General
    Partner personnel costs.  General and administrative costs decreased 1%
    or  approximately  $200 during the six months ended June  30,  2002  as
    compared to the six months ended June 30, 2001.

3.  Depletion  expense decreased to $17,000 for the six months  ended  June
    30,  2002 from $24,000 for the same period in 2001.  This represents  a
    decrease  of 29%.  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 contributing
    factor  to  the  decrease in depletion expense between the  comparative
    periods  was  the  decrease  in oil and gas revenues  received  by  the
    Partnership during 2002 as compared to 2001.



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  $7,700  in
the six months ended June 30, 2002 as compared to approximately $225,300 in
the  six  months ended June 30, 2001.  The primary source of the 2002  cash
flow from operating activities was profitable operations.

Cash  flows used in investing activities were approximately $10,100 in  the
six  months ended June 30, 2002 as compared to approximately $29,300 in the
six  months ended June 30, 2001.  The principle use of the 2002  cash  flow
from investing activities was the addition of oil and gas properties.

Cash  flows used in financing activities were none in the six months  ended
June 30, 2002 as compared to approximately $252,000 in the six months ended
June  30,  2001. The only use in financing activities was the distributions
to partners.

There  were  no  distributions during the six months ended June  30,  2002.
Total distributions during the six months ended June 30, 2001 were $252,000
of  which  $226,800 was distributed to the limited partners and $25,200  to
the general partners.  The per unit distribution to limited partners during
the six months ended June 30, 2001 was $20.83.

The  sources  for  the  2001 distributions of $252,000  were  oil  and  gas
operations  of  approximately  $225,300 and  the  change  in  oil  and  gas
properties of approximately $(29,300), with the balance from available cash
on hand at the beginning of the period.

Since  inception of the Partnership, cumulative monthly cash  distributions
of  $5,430,382  have  been made to the partners.   As  of  June  30,  2002,
$4,913,799 or $451.26 per limited partner unit has been distributed to  the
limited partners, representing a 90% return of the capital contributed.

As  of  June 30, 2002, the Partnership had approximately $80,800 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.


Recent Accounting Pronouncements

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
believes  that  the impact from SFAS No. 144 on the Partnerships  financial
position  and  results  of operation should not be significantly  different
from that of SFAS No. 121.

     In  April 2002, FASB issued SFAS No. 145, "Rescission of SFAS  No.  4,
44,  and  64,  Amendment of SFAS No. 13, and Technical Corrections."   This
Statement   rescinds  SFAS  No.  4,  "Reporting  Gains  and   Losses   from
Extinguishment of Debt", and an amendment of that Statement, SFAS  No.  64,
"Extinguishments of Debt Made to Satisfy Sinking-Fund Requirements".   This
Statement   also   rescinds   or   amends  other   existing   authoritative
pronouncements to make various technical corrections, clarify meanings,  or
describe  their applicability under changed conditions.  This  standard  is
effective  for  fiscal years beginning after May 15,  2002.   The  Managing
General Partner believes that the adoption of this statement will not  have
a significant impact on the Partnerships financial statements.

     In  July  2002,  FASB  issued  SFAS  No.  146  "Accounting  for  Costs
Associated with Exit or Disposal Activities" which establishes requirements
for  financial accounting and reporting for costs associated with  exit  or
disposal  activities.   This standard is effective  for  exit  or  disposal
activities initiated after December 31, 2002.  The Managing General Partner
is  currently  assessing the impact of this statement on the  Partnerships'
future financial statements.

Item 3.   Quantitative and Qualitative Disclosures About Market Risk

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



                       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)   Reports on Form 8-K:

No reports on Form 8-
             K were filed during the quarter ended June 30, 2002.


                                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 OIL & GAS
                                 INCOME FUND X-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 14, 2002