<PAGE>   1
                                   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 SEPTEMBER 30, 1996

                                       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 33-19721-04


                          SWIFT ENERGY MANAGED PENSION

                        ASSETS PARTNERSHIP 1989-2, LTD.
             (Exact name of registrant as specified in its charter)


            TEXAS                                          76-0281709
  (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)

                                 (713)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>   2


                          SWIFT ENERGY MANAGED PENSION
                        ASSETS PARTNERSHIP 1989-2, LTD.

                                     INDEX




PART I.    FINANCIAL INFORMATION                                         PAGE


      ITEM 1.    FINANCIAL STATEMENTS

            Balance Sheets

                - September 30, 1996 and December 31, 1995                 3

            Statements of Operations

                - Three month and nine month periods ended 
                  September 30, 1996 and 1995                              4

            Statements of Cash Flows

                - Nine month periods ended September 30, 1996 and 1995     5

            Notes to Financial Statements                                  6

      ITEM 2.    MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                 CONDITION AND RESULTS OF OPERATIONS                       8

PART II.    OTHER INFORMATION                                             10


SIGNATURES                                                                11






<PAGE>   3
                          SWIFT ENERGY MANAGED PENSION

                        ASSETS PARTNERSHIP 1989-2, LTD.
                                 BALANCE SHEETS



<TABLE>
<CAPTION>
                                                 SEPTEMBER 30,  DECEMBER 31,
                                                    1996           1995
                                                 ------------   ------------
                                                 (Unaudited)

<S>                                              <C>            <C>         
ASSETS:

Current Assets:
     Cash and cash equivalents                   $      1,406   $      1,365
     Nonoperating interests income receivable          46,214         43,116
                                                 ------------   ------------
          Total Current Assets                         47,620         44,481
                                                 ------------   ------------
Nonoperating interests in oil and gas
     properties, using full cost accounting         1,527,868      1,579,461
Less-Accumulated amortization                      (1,132,296)    (1,068,665)
                                                 ------------   ------------
                                                      395,572        510,796
                                                 ------------   ------------
                                                 $    443,192   $    555,277
                                                 ============   ============

LIABILITIES AND PARTNERS' CAPITAL:

Current Liabilities:
     Payable related to property capital costs   $      2,847   $     89,910
                                                 ------------   ------------

Partners' Capital                                     440,345        465,367
                                                 ------------   ------------
                                                 $    443,192   $    555,277
                                                 ============   ============
</TABLE>
















                See accompanying notes to financial statements.

                                       3


<PAGE>   4
                          SWIFT ENERGY MANAGED PENSION

                        ASSETS PARTNERSHIP 1989-2, LTD.
                            STATEMENTS OF OPERATIONS
                                  (Unaudited)






<TABLE>
<CAPTION>
                                        THREE MONTHS ENDED     NINE MONTHS ENDED
                                           SEPTEMBER 30,         SEPTEMBER 30,
                                        -------------------   -------------------
                                          1996       1995       1996       1995
                                        --------   --------   --------   --------
<S>                                     <C>        <C>        <C>        <C>     
REVENUES:
   Income from nonoperating interests   $ 31,831   $ 36,534   $155,824   $142,889
   Interest income                            31         19         80         43
                                        --------   --------   --------   --------
                                          31,862     36,553    155,904    142,932
                                        --------   --------   --------   --------

COSTS AND EXPENSES:
   Amortization                           18,622     38,443     63,631    107,488
   General and administrative              8,541      8,286     25,909     23,017
                                        --------   --------   --------   --------
                                          27,163     46,729     89,540    130,505
                                        --------   --------   --------   --------
NET INCOME (LOSS)                       $  4,699   $(10,176)  $ 66,364   $ 12,427
                                        ========   ========   ========   ========



LIMITED PARTNERS' NET INCOME (LOSS)
   PER UNIT                             $    .28   $   (.61)  $  3.96    $    .74
                                        ========   ========   =======    ========
</TABLE>

















                 See accompanying note to financial statements.

                                       4

<PAGE>   5
                          SWIFT ENERGY MANAGED PENSION

                        ASSETS PARTNERSHIP 1989-2, LTD.
                            STATEMENTS OF CASH FLOWS
                                  (Unaudited)


<TABLE>
<CAPTION>
                                                                       NINE MONTHS ENDED
                                                                          SEPTEMBER 30,
                                                                     ----------------------
                                                                         1996       1995
                                                                     ---------    ---------
<S>                                                                  <C>          <C>      
CASH FLOWS FROM OPERATING ACTIVITIES:
    Income (Loss)                                                    $  66,364    $  12,427
    Adjustments to reconcile income (loss) to
      net cash provided by operations:
      Amortization                                                      63,631      107,488
      Change in assets and liabilities:
        (Increase) decrease in nonoperating interests income
          receivable                                                    (3,098)       7,766
        Increase (decrease) in accounts payable
          and accrued liabilities                                         --             29
                                                                     ---------    ---------
               Net cash provided by (used in) operating activities     126,897      127,710
                                                                     ---------    ---------
CASH FLOWS FROM INVESTING ACTIVITIES:
    Additions to nonoperating interests in oil
      and gas properties                                                (7,073)     (10,904)
    Proceeds from sale of nonoperating interests
      in oil and gas properties                                         58,666         --
    Payable related to property capital costs                          (87,063)     (46,054)
                                                                     ---------    ---------
               Net cash provided by (used in) investing activities     (35,470)     (56,958)
                                                                     ---------    ---------
CASH FLOWS FROM FINANCING ACTIVITIES:
    Cash distributions to partners                                     (91,386)     (70,709)
                                                                     ---------    ---------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                        41           43
                                                                     ---------    ---------
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD                         1,365        1,291
                                                                     ---------    ---------
CASH AND CASH EQUIVALENTS AT END OF PERIOD                           $   1,406    $   1,334
                                                                     =========    =========
Supplemental disclosure of cash flow information:
    Cash paid during the period for interest                         $   1,789    $   3,437
                                                                     =========    =========
</TABLE>








                See accompanying notes to financial statements.

                                       5

<PAGE>   6

                          SWIFT ENERGY MANAGED PENSION
                        ASSETS PARTNERSHIP 1989-2, 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, 1995 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 1989-2, Ltd.,
        a Texas limited partnership (the Partnership), was formed on September
        30, 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 Partners, Ltd. ("VJM"), a Texas limited
        partnership, serve as Managing General Partner and Special General
        Partner of the Partnership, respectively. The Managing General Partner
        is required to contribute up to 1/99th of limited partner net
        contributions. The 182 limited partners made total capital
        contributions of $1,676,058.

                  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 1995,
        1994 and 1993, the cash distribution rate fell below 17.5 percent and
        thus, in 1996, 1995 and 1994, the continuing costs and revenues will be
        (were) shared 90 percent by the limited partners and 10 percent by the
        general partners.

(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.


                                       6
<PAGE>   7


                          SWIFT ENERGY MANAGED PENSION
                        ASSETS PARTNERSHIP 1989-2, LTD.
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                  (UNAUDITED)


     NONOPERATING INTERESTS IN OIL AND GAS PROPERTIES --

                  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 -

                  Affiliates of the Special General Partner, as Dealer Manager,
        received $41,901 for managing and overseeing the offering of the
        limited partnership units. A one-time management fee of $41,901 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 1989-3, 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 Operating
        Partnership will convey to the Partnership 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 Company'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.

                  The Partnership extends credit 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.

(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.



                                       7
<PAGE>   8


                          SWIFT ENERGY MANAGED PENSION
                        ASSETS PARTNERSHIP 1989-2, 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.

LIQUIDITY AND CAPITAL RESOURCES

      The Partnership has completed acquisition of nonoperating interests in
producing oil and gas properties, expending all of the limited partners' net
commitments available for property acquisitions.

      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

      The following analysis explains changes in the revenue and expense
categories for the quarter ended September 30, 1996 (current quarter) when
compared to the quarter ended September 30, 1995 (corresponding quarter), and
for the nine months ended September 30, 1996 (current period), when compared to
the nine months ended September 30, 1995 (corresponding period).

Three Months Ended September 30, 1996 and 1995

      Income from nonoperating interests decreased 13 percent in the current
quarter of 1996 when compared to the third quarter in 1995. Oil and gas sales
declined $11,246 or 19 percent in the third quarter of 1996 when compared to
the corresponding quarter in 1995, primarily due to decreased gas and oil
production. A decline of 34 percent in gas production and 22 percent in oil
production had a significant impact on partnership performance. Current quarter
gas and oil prices increased 77 percent or $1.06/MCf and 17 percent or
$2.55/BBL, respectively, partially offsetting the revenue declines.

      Associated amortization expense decreased 36 percent or $10,607.

      The Partnership recorded an additional provision in amortization in the
third quarter of 1995 for $9,214 when the present value, discounted at ten
percent, of estimated future net revenues from oil and gas properties, using
the guidelines of the Securities and Exchange Commission, was below the fair
market value originally paid for oil and gas properties. The additional
provision results from the Managing General Partner's determination that the
fair market value paid for properties may or may not coincide with reserve
valuations determined according to guidelines of the Securities and Exchange
Commission.



                                       8
<PAGE>   9

                          SWIFT ENERGY MANAGED PENSION
                        ASSETS PARTNERSHIP 1989-2, LTD.
               MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                CONDITION AND RESULTS OF OPERATIONS (CONTINUED)



Nine Months Ended September 30, 1996 and 1995

      Income from nonoperating interests increased 9 percent in the current
period of 1996 when compared to the corresponding period in 1995. Oil and gas
sales increased $3,016 or 2 percent in the first nine months of 1996 over the
corresponding period in 1995. An increase in gas prices of 58 percent or
$.87/MCF and in oil prices of 14 percent or $2.14/BBL were major contributing
factors to the increased revenues for the period. Also, current period gas and
oil production decreased 33 percent and 18 percent, respectively, when compared
to the corresponding period in 1995, partially offsetting the effect of
increased gas and oil prices.

      Associated amortization expense decreased 35 percent or $34,266.

      The Partnership recorded an additional provision in amortization in the
first nine months of 1995 for $9,591 when the present value, discounted at ten
percent, of estimated future net revenues from oil and gas properties, using
the guidelines of the Securities and Exchange Commission, was below the fair
market value originally paid for oil and gas properties. The additional
provision results from the Managing General Partner's determination that the
fair market value paid for properties may or may not coincide with reserve
valuations determined according to guidelines of the Securities and Exchange
Commission.

      During 1996, partnership revenues and costs will be shared between the
limited partners and general partners in a 90:10 ratio.



                                       9
<PAGE>   10

                          SWIFT ENERGY MANAGED PENSION
                        ASSETS PARTNERSHIP 1989-2, LTD.
                          PART II - OTHER INFORMATION




ITEM 5.    OTHER INFORMATION


                                     -NONE-




                                      10
<PAGE>   11



                                   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 1989-2, LTD.
                                              (Registrant)

                                          By: SWIFT ENERGY COMPANY
                                              Managing General Partner


Date:  November 6, 1996                   By: /s/ John R. Alden
     ----------------------------             --------------------------------
                                              John R. Alden
                                              Senior Vice President, Secretary
                                              and Principal Financial Officer

Date:  November 6, 1996                   By: /s/ Alton D. Heckaman, Jr.
     ----------------------------             --------------------------------
                                              Alton D. Heckaman, Jr.
                                              Vice President, Controller
                                              and Principal Accounting Officer



                                      11
<PAGE>   12
                              INDEX TO EXHIBITS



<TABLE>
<CAPTION>
EXHIBIT
NUMBER                   DESCRIPTION
-------                  -----------
<S>           <C>
  27          -  Financial Data Schedule

</TABLE>