FORM 10-Q

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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

                  For the quarterly period ended March 31, 2000

                                       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 0-18359

                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
             (Exact name of registrant as specified in its charter)

           Texas                                      76-0282457
(State or other jurisdiction              (I.R.S. Employer of organization)
    Identification No.)

                        16825 Northchase Drive, Suite 400
                              Houston, Texas 77060
                    (Address of principal executive offices)
                                   (Zip Code)

                                  (281)874-2700

              (Registrant's telephone number, including area code)

                                      None

              (Former name, former address and former fiscal year,
                          if changed since last report)


Indicate by check mark whether the 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
   ------     -----




<PAGE>


                          SWIFT ENERGY MANAGED PENSION

                         ASSETS PARTNERSHIP 1989-B, LTD.

                                      INDEX
<TABLE>
<CAPTION>
PART I.    FINANCIAL INFORMATION                                             PAGE

      <S>                                                                    <C>
      ITEM 1.    Financial Statements

            Balance Sheets

                - March 31, 2000 and December 31, 1999                        3

            Statements of Operations

                - Three month periods ended March 31, 2000 and 1999           4

            Statements of Cash Flows

                - Three month periods ended March 31, 2000 and 1999           5

            Notes to Financial Statements                                     6

      ITEM 2.    Management's Discussion and Analysis of Financial

                     Condition and Results of Operations                      9

PART II.    OTHER INFORMATION                                                11


SIGNATURES                                                                   12
</TABLE>




<PAGE>


                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                                 BALANCE SHEETS

<TABLE>
<CAPTION>
                                                               March 31,           December 31,
                                                                 2000                  1999
                                                             --------------        --------------
                                                              (Unaudited)
ASSETS:
<S>                                                          <C>                   <C>
Current Assets:
     Cash and cash equivalents                               $        1,023        $        4,488
     Nonoperating interests income receivable                        97,641                79,909
                                                             --------------        --------------
          Total Current Assets                                       98,664                84,397
                                                             --------------        --------------

Nonoperating interests in oil and gas
     properties, using full cost accounting                       3,753,111             3,745,061
Less-Accumulated amortization                                    (3,145,015)           (3,121,569)
                                                             --------------        --------------
                                                                    608,096               623,492
                                                             --------------        --------------
                                                             $      706,760        $      707,889
                                                             ==============        ==============


LIABILITIES AND PARTNERS' CAPITAL:

Current Liabilities:
     Accounts Payable                                        $        6,103        $       10,610
                                                             --------------        --------------


Limited Partners' Capital (39,831 Limited Partnership
                           Units; $100 per unit)                    694,877               695,470
General Partners' Capital                                             5,780                 1,809
                                                             --------------        --------------
           Total Partners' Capital                                  700,657               697,279
                                                             --------------        --------------
                                                             $      706,760        $      707,889
                                                             ==============        ==============
</TABLE>



                 See accompanying notes to financial statements.

                                      3

<PAGE>

                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                            STATEMENTS OF OPERATIONS
                                   (Unaudited)
<TABLE>
<CAPTION>
                                                           Three Months Ended
                                                               March 31,
                                                    ---------------------------------
                                                        2000               1999
                                                    --------------     --------------

REVENUES:
<S>                                                 <C>    <C>
     Income from nonoperating interests             $       77,447     $       91,562
     Interest income                                            71                 73
                                                    --------------     --------------
                                                            77,518             91,635
                                                    --------------     --------------


COSTS AND EXPENSES:

     Amortization                                           23,446             50,140
     General and administrative                             20,449             22,860
                                                    --------------     --------------
                                                            43,895             73,000
                                                    --------------     --------------
NET INCOME (LOSS)                                   $       33,623     $       18,635
                                                    ==============     ==============




Limited Partners' net income (loss)
     per unit                                       $         0.64     $         0.21
                                                    ==============     ==============
</TABLE>




                 See accompanying notes to financial statements.

                                       4

<PAGE>

                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                             STATEMENT OF CASH FLOWS
                                   (Unaudited)
<TABLE>
<CAPTION>
                                                                                                     Three Months Ended
                                                                                                          March 31,
                                                                                             ------------------------------------
                                                                                                 2000                  1999
                                                                                             --------------        --------------

CASH FLOWS FROM OPERATING ACTIVITIES:
     <S>                                                                                     <C>                   <C>
     Income (loss)                                                                           $       33,623        $       18,635
     Adjustments to reconcile income (loss) to
          net cash provided by operations:
          Amortization                                                                               23,446                50,140
          Change in assets and liabilities:
               (Increase) decrease in nonoperating interests income receivable                      (17,732)                  337
               Increase (decrease) in accounts payable                                               (4,507)             (133,938)
                                                                                             --------------        --------------
          Net cash provided by (used in) operating activities                                        34,830               (64,826)
                                                                                             --------------        --------------

CASH FLOWS FROM INVESTING ACTIVITIES:

     Additions to nonoperating interests in oil and gas properties                                   (8,050)               (1,803)

     Proceeds from sales of nonoperating interests in oil and gas properties                             --                97,716
                                                                                             --------------        --------------
          Net cash provided by (used in) investing activities                                        (8,050)               95,913
                                                                                             --------------        --------------

CASH FLOWS FROM FINANCING ACTIVITIES:

     Cash Distributions to partners                                                                 (30,245)              (31,081)
                                                                                             --------------        --------------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                                 (3,465)                    6
                                                                                             --------------        --------------
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD                                                      4,488                 1,530
                                                                                             --------------        --------------
CASH AND CASH EQUIVALENTS AT END OF PERIOD                                                   $        1,023        $        1,536
                                                                                             ==============        ==============
</TABLE>



                 See accompanying notes to financial statements.

                                       5

<PAGE>


                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                          NOTES TO FINANCIAL STATEMENTS
                                   (UNAUDITED)

(1)  General Information -

                  The financial statements included herein have been prepared by
        the  Partnership  and are  unaudited  except  for the  balance  sheet at
        December  31,  1999  which has been  taken  from the  audited  financial
        statements at that date. The financial  statements reflect  adjustments,
        all of which were of a normal recurring nature, which are in the opinion
        of the  managing  general  partner  necessary  for a fair  presentation.
        Certain  information  and  footnote  disclosures  normally  included  in
        financial  statements  prepared in accordance  with  generally  accepted
        accounting  principles  have  been  omitted  pursuant  to the  rules and
        regulations  of the  Securities  and Exchange  Commission  ("SEC").  The
        Partnership  believes adequate disclosure is provided by the information
        presented.  The financial  statements should be read in conjunction with
        the audited  financial  statements  and the notes included in the latest
        Form 10-K.

(2)  Organization and Terms of Partnership Agreement -

                  Swift Energy Managed Pension Assets Partnership 1989-B,  Ltd.,
        a Texas limited partnership ("the  Partnership"),  was formed on May 31,
        1989,  for the purpose of purchasing net profits  interests,  overriding
        royalty  interests and royalty  interests  (collectively,  "nonoperating
        interests") in producing oil and gas properties  within the  continental
        United States. Swift Energy Company ("Swift"), a Texas corporation,  and
        VJM Corporation  ("VJM"),  a California  corporation,  serve as Managing
        General  Partner  and  Special  General  Partner  of  the   Partnership,
        respectively.  The general  partners  are required to  contribute  up to
        1/99th of limited partner net  contributions.  The 480 limited  partners
        made total capital contributions of $3,983,064.

                  Nonoperating  interests  acquisition  costs and the management
        fee are borne 99 percent by the limited  partners and one percent by the
        general  partners.  Organization and syndication costs were borne solely
        by the limited partners.

                  Generally,  all continuing costs (including development costs,
        operating costs,  general and  administrative  reimbursements and direct
        expenses) and revenues are allocated 90 percent to the limited  partners
        and ten percent to the general partners. If prior to partnership payout,
        however,  the cash  distribution  rate for a  certain  period  equals or
        exceeds  17.5  percent,  then for the  following  calendar  year,  these
        continuing  costs and  revenues  will be  allocated  85  percent  to the
        limited  partners  and  15  percent  to  the  general  partners.   After
        partnership  payout,  continuing  costs and  revenues  will be shared 85
        percent by the limited partners, and 15 percent by the general partners,
        even if the cash  distribution  rate is less than 17.5  percent.  During
        1992 and 1991, the cash distribution rate (as defined in the Partnership
        Agreement)  exceeded  17.5  percent  and  thus,  in 1993 and  1992,  the
        continuing  costs and  revenues  were  shared 85 percent by the  limited
        partners  and 15 percent by the general  partners.  During  1997,  1996,
        1995, 1994 and 1993, the cash  distribution rate fell below 17.5 percent
        and thus, in 1997, 1996, 1995 and 1994 the continuing costs and revenues
        were  shared 85 percent by the  limited  partners  and 15 percent by the
        general partners.  Payout occurred in January, 1998; therefore, for 1998
        and each year remaining in the life of the  partnership,  the continuing
        costs and revenues will be shared 85 percent by the limited partners and
        15 percent by the general partners.

                  During the first quarter of 2000, the Managing General Partner
        mailed proxy material to the limited partners  proposing to sell all the
        Partnership's  nonoperating  interests  in oil  and gas  properties  and
        dissolve  and  liquidate  the  Partnership.  In April 2000,  the limited
        partners of the  Partnership  approved  the  proposal to  liquidate  the
        Partnership.  The Managing General Partner anticipates  liquidation will
        be substantially completed within the next two years.

(3)  Significant Accounting Policies -

     Use of Estimates -

                  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  at the date of the  financial  statements  and the reported
        amounts of revenues and expenses  during the  reporting  period.  Actual
        results could differ from estimates.

     Oil and Gas Revenues -

                  Oil and gas revenues are reported using the entitlement method
        in which the Partnership  recognizes its interest in oil and natural gas
        production as revenue.

                                       6

<PAGE>


                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                   (UNAUDITED)

     Nonoperating Interests in Oil and Gas Properties --

                  The  Partnership  accounts  for its  ownership  in oil and gas
        properties using the  proportionate  consolidation  method,  whereby the
        Partnership's  share of assets,  liabilities,  revenues  and expenses is
        included in the appropriate classification in the financial statement.

                  For financial  reporting purposes the Partnership  follows the
        "full-cost"  method of accounting for nonoperating  interests in oil and
        gas property costs. Under this method of accounting,  all costs incurred
        in the acquisition of  nonoperating  interests in oil and gas properties
        are capitalized.  The unamortized cost of nonoperating  interests in oil
        and gas  properties is limited to the "ceiling  limitation"  (calculated
        separately for the Partnership,  limited partners and general partners).
        The  "ceiling  limitation"  is  calculated  on  a  quarterly  basis  and
        represents the estimated future net revenues from nonoperating interests
        in proved  properties  using current prices,  discounted at ten percent.
        Proceeds from the sale or disposition of  nonoperating  interests in oil
        and  gas  properties  are  treated  as a  reduction  of the  cost of the
        nonoperating  interests  with no gains or  losses  recognized  except in
        significant transactions.

                  The Partnership computes the provision for amortization of oil
        and gas properties on the units-of-production method. Under this method,
        the provision is calculated by multiplying the total unamortized cost of
        oil and gas  properties  by an overall rate  determined  by dividing the
        physical  units of oil and gas  produced  during the period by the total
        estimated proved oil and gas reserves at the beginning of the period.

                  The calculation of the "ceiling  limitation" and the provision
        for  depreciation,  depletion and  amortization is based on estimates of
        proved reserves. There are numerous uncertainties inherent in estimating
        quantities  of proved  reserves  and in  projecting  the future rates of
        production,  timing and plan of development. The accuracy of any reserve
        estimate  is a  function  of  the  quality  of  available  data  and  of
        engineering  and  geological  interpretation  and  judgment.  Results of
        drilling,  testing and production subsequent to the date of the estimate
        may justify revision of such estimate.  Accordingly,  reserve  estimates
        are  often  different  from  the  quantities  of oil  and gas  that  are
        ultimately recovered.

(4)  Related-Party Transactions -

                  An  affiliate  of  the  Special  General  Partner,  as  Dealer
        Manager,  received  $99,177 for managing and  overseeing the offering of
        the limited  partnership units. A one-time management fee of $99,577 was
        paid to Swift for services performed for the Partnership.

                  The  Partnership  entered  into a Net Profits  and  Overriding
        Royalty Interests Agreement ("NP/OR Agreement") with Swift Energy Income
        Partners 1989-B, Ltd. ("Operating  Partnership"),  managed by Swift, for
        the purpose of acquiring nonoperating interests in producing oil and gas
        properties. Under terms of the NP/OR Agreement, the Partnership has been
        conveyed a  nonoperating  interests in the aggregate net profits  (i.e.,
        oil and gas  sales net of  related  operating  costs) of the  properties
        acquired equal to its  proportionate  share of the property  acquisition
        costs.

(5)  Vulnerability Due to Certain Concentrations -

                  The  Partnership's  revenues are primarily the result of sales
        of its oil and natural gas production.  Market prices of oil and natural
        gas may fluctuate and adversely affect operating results.

                  In the normal  course of  business,  the  Partnership  extends
        credit,  primarily in the form of monthly oil and gas sales receivables,
        to various  companies  in the oil and gas  industry  which  results in a
        concentration  of credit risk. This  concentration of credit risk may be
        affected by changes in economic or other  conditions and may accordingly
        impact the  Partnership's  overall  credit risk.  However,  the Managing
        General  Partner  believes  that  the  risk is  mitigated  by the  size,
        reputation, and nature of the companies to which the Partnership extends
        credit.  In  addition,   the  Partnership  generally  does  not  require
        collateral or other security to support customer receivables.

                                       7

<PAGE>


                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                   (UNAUDITED)


(6)  Fair Value of Financial Instruments -

                  The Partnership's  financial  instruments  consist of cash and
        cash equivalents and short-term  receivables and payables.  The carrying
        amounts  approximate  fair value due to the highly  liquid nature of the
        short-term instruments.

                                       8

<PAGE>

                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                       CONDITION AND RESULTS OF OPERATIONS

GENERAL

      The  Partnership  is formed for the purpose of investing  in  nonoperating
interests in producing oil and gas  properties  located  within the  continental
United States.  In order to accomplish  this, the  Partnership  goes through two
distinct yet  overlapping  phases with respect to its  liquidity  and results of
operations.  When the  Partnership  is formed,  it commences  its  "acquisition"
phase,  with all funds placed in short-term  investments  until required for the
acquisition of nonoperating interests.  Therefore,  the interest earned on these
pre-acquisition  investments  becomes the  primary  cash flow source for initial
partner  distributions.  As the Partnership acquires  nonoperating  interests in
producing properties,  net cash from ownership of nonoperating interests becomes
available  for  distribution,  along  with  the  investment  income.  After  all
partnership funds have been expended on nonoperating  interests in producing oil
and gas properties,  the Partnership enters its "operations"  phase. During this
phase,  income  from  nonoperating  interests  in oil  and gas  sales  generates
substantially all revenues, and distributions to partners reflect those revenues
less all  associated  partnership  expenses.  The  Partnership  may also  derive
proceeds  from  the  sale of  nonoperating  interests  in  acquired  oil and gas
properties,  when the sale of such  interests  is  economically  appropriate  or
preferable to continued operations.

LIQUIDATION

         During the first quarter of 2000, the Managing  General  Partner mailed
proxy material to the limited partners  proposing to sell all the  Partnership's
nonoperating  interests in oil and gas properties and dissolve and liquidate the
Partnership. In April 2000, the limited partners of the Partnership approved the
proposal to liquidate the Partnership.  The Managing General Partner anticipates
liquidation will be substantially completed within the next two years.

LIQUIDITY AND CAPITAL RESOURCES

     Oil and gas reserves are depleting  assets and therefore  often  experience
significant  production  declines each year from the date of acquisition through
the end of the life of the  property.  The primary  source of  liquidity  to the
Partnership comes almost entirely from the income generated from the sale of oil
and gas produced from ownership interests in oil and gas properties. This source
of  liquidity  and  the  related  results  of  operations,   and  in  turn  cash
distributions,  will decline in future  periods as the oil and gas produced from
these properties also declines while  production and general and  administrative
costs remain relatively stable making it unlikely that the Partnership will hold
the properties  until they are fully depleted,  but will likely liquidate when a
substantial  majority of the reserves have been produced.  Cash distributions to
partners are determined quarterly, based upon net proceeds from sales of oil and
gas production after payment of lease operating  expense,  taxes and development
costs, less general and administrative expenses. In addition, future partnership
cash requirements are taken into account to determine necessary cash reserves.

      Net cash provided by (used in) operating  activities  totaled  $34,830 and
$(64,826) for the three months ended March 31, 2000 and 1999, respectively. Cash
provided by  proceeds  from the sale of  nonoperating  interests  in  properties
totaled  $97,716 for the three months ended March 31, 1999.  Cash  distributions
totaled  $30,245 and $31,081 for the three months ended March 31, 2000 and 1999,
respectively.

      The  Partnership  has  expended  all  of  the  partners'  net  commitments
available for property  acquisitions and development by acquiring  producing oil
and gas  properties.  The  partnership  invests  primarily  in proved  producing
properties  with nominal  levels of future costs of  development  for proven but
undeveloped reserves.  Significant purchases of additional reserves or extensive
drilling activity are not anticipated.  Under the NP/OR Agreement,  the Managing
General  Partner  acquires  interests  in oil and gas  properties  from  outside
parties and sells these interests to an affiliated operating partnership, who in
turn creates and sells to the Partnership  nonoperating  interests in these same
oil and gas  properties.  The Managing  General  Partner expects funds available
from net profits interests to be distributed to the partners.

RESULTS OF OPERATIONS

      Income  from  nonoperating  interests  decreased  15  percent in the first
quarter of 2000,  when  compared to the same quarter in 1999.  Oil and gas sales
declined  $10,459 or 8 percent in the first quarter of 2000 when compared to the
corresponding quarter in 1999, due to decreased oil and gas production.  Current
quarter  production  volumes  decreased  47 percent  as soil and gas  production
declined 25 percent and 56 percent, respectively, when compared to first quarter
1999 production  volumes.  Production declines were related to the Partnership's
property  sales in 1999.  Oil prices  increased  103 percent or $13.14/BBL to an
average of  $25.85/BBL  and gas prices  increased  58 percent or $1.14/MCF to an
average of $3.11/MCF for the quarter.  Decreased production significantly offset
the effect of increased oil and gas prices.

                                       9

<PAGE>


                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                 CONDITION AND RESULTS OF OPERATIONS (CONTINUED)


      Corresponding production costs per equivalent MCF increased 122 percent in
the  first  quarter  of 2000  compared  to the first  quarter  of 1999 and total
production costs increased 18 percent.

      Total  amortization  expense  decreased  53  percent  or  $26,694  in 2000
compared to first quarter 1999, related to the decline in production volumes.

      Partnership payout occurred as of January 1,1998. During 2000, partnership
revenues  and costs will be shared  between  the  limited  partners  and general
partners in an 85:15 ratio.

                                       10

<PAGE>


                          SWIFT ENERGY MANAGED PENSION
                         ASSETS PARTNERSHIP 1989-B, LTD.
                           PART II - OTHER INFORMATION

ITEM 5.    OTHER INFORMATION

                                     -NONE-

                                       11

<PAGE>



                                   SIGNATURES

Pursuant to the  requirements of Section 13 or 15(d) 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.

                                     SWIFT ENERGY MANAGED PENSION
                                     ASSETS PARTNERSHIP 1989-B, LTD.
                                     (Registrant)

                          By:        SWIFT ENERGY COMPANY
                                     Managing General Partner

Date:     May 8, 2000     By:        /s/ John R. Alden
        --------------
                                     ----------------------------------
                                     John R. Alden
                                     Senior Vice President, Secretary
                                     and Principal Financial Officer

Date:     May 8, 2000     By:        /s/ Alton D. Heckaman, Jr.
        --------------
                                     ----------------------------------
                                     Alton D. Heckaman, Jr.
                                     Vice President, Controller
                                     and Principal Accounting Officer

                                       12