<PAGE>   1
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 14, 2000

                                                           REGISTRATION NO. 333-
    ============================================================================

                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                             ----------------------

                                    FORM S-8

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                           EL PASO ENERGY CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)



              DELAWARE                                       76-0568816
   (STATE OR OTHER JURISDICTION OF                        (I.R.S. EMPLOYER
   INCORPORATION OR ORGANIZATION)                        IDENTIFICATION NO.)



                             EL PASO ENERGY BUILDING
                              1001 LOUISIANA STREET
                              HOUSTON, TEXAS 77002
                                 (713) 420-2131
          (ADDRESS, INCLUDING ZIP CODE, OF PRINCIPAL EXECUTIVE OFFICES)

                           EL PASO ENERGY CORPORATION
                      OMNIBUS PLAN FOR MANAGEMENT EMPLOYEES
                            (FULL TITLE OF THE PLAN)

                             BRITTON WHITE JR., ESQ.
                  EXECUTIVE VICE PRESIDENT AND GENERAL COUNSEL
                             EL PASO ENERGY BUILDING
                              1001 LOUISIANA STREET
                              HOUSTON, TEXAS 77002
                                 (713) 420-2131
            (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                             ----------------------

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>

------------------------------------------------------------------------------------------------------------------
                                                                                        PROPOSED
                                                                       PROPOSED         MAXIMUM
                                                                       MAXIMUM         AGGREGATE       AMOUNT OF
             TITLE OF SECURITIES                  AMOUNT TO BE      OFFERING PRICE      OFFERING      REGISTRATION
               TO BE REGISTERED                    REGISTERED       PER SHARE (2)      PRICE (2)        FEE (2)
------------------------------------------------------------------------------------------------------------------
<S>                                             <C>                     <C>           <C>               <C>
Common Stock(1) (including associated
preferred stock purchase rights), par value     8,000,000 shares        $37.50        $300,000,000      $79,200
$3.00 per share
------------------------------------------------------------------------------------------------------------------
</TABLE>


(1)  This Registration Statement also covers such indeterminable number of
     additional shares as may become issuable to prevent dilution in the event
     of stock splits, stock dividends or similar adjustments of the outstanding
     Common Stock of the Registrant.
(2)  Estimated solely for the purpose of calculating the registration fee
     pursuant to Rule 457(h), based upon the average of the high and low prices
     of a share of the Registrant's Common Stock for January 12, 2000 as
     reported on the New York Stock Exchange and in The Wall Street Journal on
     January 13, 2000.




================================================================================
<PAGE>   2






               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

         This Registration Statement on Form S-8 is being filed solely to
register additional securities. In accordance with General Instruction E of Form
S-8, the Registrant hereby incorporates by reference the contents of the
Registrant's registration statement on Form S-8 (No. 333-78979), filed with the
Securities and Exchange Commission relating to the El Paso Energy Corporation
Omnibus Plan for Management Employees.

ITEM 8.  EXHIBITS.

       EXHIBIT
       NUMBER         DESCRIPTION
       -------        -----------
        5.1           Opinion of Andrews & Kurth L.L.P. regarding the legality
                      of the securities being registered hereunder.

       10.1           El Paso Energy Corporation Omnibus Plan for Management
                      Employees, Amended and Restated as of December 3, 1999.

       23.1           Consent of Counsel (included in the opinion filed as
                      Exhibit 5.1 to this Registration Statement).

       23.2           Consent of PricewaterhouseCoopers LLP.

       24.1           Power of Attorney (set forth on the signature page
                      contained  in Part II of this Registration Statement).


ITEM 9.  UNDERTAKINGS.

         (a)      The undersigned Registrant hereby undertakes:

                  (1) To file, during any period in which offers or sales are
         being made, a post-effective amendment to this Registration Statement:

                           (i)  To include any prospectus required by Section
                  10(a)(3) of the Securities Act;

                           (ii) To reflect in the prospectus any facts or events
                  arising after the effective date of this Registration
                  Statement (or the most recent post-effective amendment
                  thereof) which, individually or in the aggregate, represent a
                  fundamental change in the information set forth in this
                  Registration Statement;



<PAGE>   3

                           (iii) To include any material information with
                  respect to the plan of distribution not previously disclosed
                  in the Registration Statement or any material change to such
                  information in this Registration Statement;


                  Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do
         not apply if the information required to be included in a
         post-effective amendment by those paragraphs is contained in periodic
         reports filed with or furnished to the Commission by the registrant
         pursuant to Section 13 or Section 15(d) of the Exchange Act that are
         incorporated by reference in the Registration Statement.

                  (2) That, for the purpose of determining any liability under
         the Securities Act, each such post-effective amendment shall be deemed
         to be a new registration statement relating to the securities offered
         therein, and the offering of such securities at that time shall be
         deemed to be the initial bona fide offering thereof.

                  (3) To remove from registration by means of a post-effective
         amendment any of the securities being registered which remain unsold at
         the termination of the offering.

         (b) The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange
Act that is incorporated by reference in this Registration Statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

         (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Securities Act and
is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.


<PAGE>   4



                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Houston, State of Texas, on this 14th day of January,
2000.


                                      EL PASO ENERGY CORPORATION



                                      By: /s/ William A. Wise
                                          --------------------------------------
                                          WILLIAM A. WISE
                                          President and Chief Executive Officer


                                POWER OF ATTORNEY

         Each person whose individual signature appears below hereby authorizes
H. Brent Austin and Britton White Jr., and each of them, as attorneys-in-fact
with full power of substitution, to execute in the name and on behalf of such
person, individually and in each capacity stated below, and to file, any and all
amendments to this Registration Statement, including any and all post-effective
amendments.

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed by the following persons in the
capacities and on the dates as indicated.

<TABLE>
<CAPTION>
      Signature                                     Title                                     Date
      ---------                                     -----                                     ----
<S>                                     <C>                                             <C>
/s/ William A. Wise                     President, Chief Executive                      January 14, 2000
--------------------------------        Officer and Director
William A. Wise


/s/ H. Brent Austin                     Executive Vice President                        January 14, 2000
--------------------------------        and Chief Financial Officer
H. Brent Austin


/s/ Jeffrey I. Beason                   Senior Vice President and Controller            January 14, 2000
--------------------------------        (Chief Accounting Officer)
Jeffrey I. Beason

</TABLE>

<PAGE>   5


<TABLE>
<S>                                     <C>                                             <C>
/s/ Ronald L. Kuehn, Jr.                Chairman of the Board                           January 14, 2000
--------------------------------
Ronald L. Kuehn, Jr.

/s/ Byron Allumbaugh                    Director                                        January 14, 2000
--------------------------------
Byron Allumbaugh

/s/ Juan Carlos Braniff                 Director                                        January 14, 2000
--------------------------------
Juan Carlos Braniff

/s/ James F. Gibbons                    Director                                        January 14, 2000
--------------------------------
James F. Gibbons

/s/ Ben F. Love                         Director                                        January 14, 2000
--------------------------------
Ben F. Love

/s/ Max L. Lukens                       Director                                        January 14, 2000
--------------------------------
Max L. Lukens

/s/ Kenneth L. Smalley                  Director                                        January 14, 2000
--------------------------------
Kenneth L. Smalley

/s/ Adrian M. Tocklin                   Director                                        January 14, 2000
--------------------------------
Adrian M. Tocklin

/s/ Malcolm Wallop                      Director                                        January 14, 2000
--------------------------------
Malcolm Wallop

/s/ Joe B. Wyatt                        Director                                        January 14, 2000
--------------------------------
Joe B. Wyatt

/s/ Selim K.Zilkha                      Director                                        January 14, 2000
--------------------------------
Selim K. Zilkha

</TABLE>


<PAGE>   6




                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
EXHIBIT
NUMBER      DESCRIPTION
-------     -----------

<S>         <C>
 5.1        Opinion of Andrews & Kurth L.L.P. regarding the legality
            of the securities being registered hereunder.

10.1        El Paso Energy Corporation Omnibus Plan for Management
            Employees, Amended and Restated as of December 3, 1999.

23.1        Consent of Counsel (included in the opinion filed as
            Exhibit 5.1 to this Registration Statement).

23.2        Consent of PricewaterhouseCoopers LLP.

24.1        Power of Attorney (set forth on the signature page
            contained  in Part II of this Registration Statement).

</TABLE>
[{"type": "S-8", "sequence": "1", "description": "EL PASO ENERGY CORPORATION", "secsgml_size_bytes": 13842}]
{"company-data": {"conformed-name": "EL PASO ENERGY CORP/DE", "cik": "0001066107", "assigned-sic": "4922", "irs-number": "760568816", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-94719", "film-number": "507752"}, "business-address": {"street1": "1001 LOUISIANA ST", "city": "HOUSTON", "state": "TX", "zip": "77002", "phone": "7134202131"}, "mail-address": {"street1": "1001 LOUISIANA ST", "city": "HOUSTON", "state": "TX", "zip": "77002"}}
1
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 14, 2000

                                                           REGISTRATION NO. 333-
    ============================================================================

                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                             ----------------------

                                    FORM S-8

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                           EL PASO ENERGY CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

              DELAWARE                                       76-0568816
   (STATE OR OTHER JURISDICTION OF                        (I.R.S. EMPLOYER
   INCORPORATION OR ORGANIZATION)                        IDENTIFICATION NO.)

                             EL PASO ENERGY BUILDING
                              1001 LOUISIANA STREET
                              HOUSTON, TEXAS 77002
                                 (713) 420-2131
          (ADDRESS, INCLUDING ZIP CODE, OF PRINCIPAL EXECUTIVE OFFICES)

                           EL PASO ENERGY CORPORATION
                      OMNIBUS PLAN FOR MANAGEMENT EMPLOYEES
                            (FULL TITLE OF THE PLAN)

                             BRITTON WHITE JR., ESQ.
                  EXECUTIVE VICE PRESIDENT AND GENERAL COUNSEL
                             EL PASO ENERGY BUILDING
                              1001 LOUISIANA STREET
                              HOUSTON, TEXAS 77002
                                 (713) 420-2131
            (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                             ----------------------

                         CALCULATION OF REGISTRATION FEE
------------------------------------------------------------------------------------------------------------------
                                                                                        PROPOSED
                                                                       PROPOSED         MAXIMUM
                                                                       MAXIMUM         AGGREGATE       AMOUNT OF
             TITLE OF SECURITIES                  AMOUNT TO BE      OFFERING PRICE      OFFERING      REGISTRATION
               TO BE REGISTERED                    REGISTERED       PER SHARE (2)      PRICE (2)        FEE (2)
------------------------------------------------------------------------------------------------------------------
Common Stock(1) (including associated
preferred stock purchase rights), par value     8,000,000 shares        $37.50        $300,000,000      $79,200
$3.00 per share
------------------------------------------------------------------------------------------------------------------
(1)  This Registration Statement also covers such indeterminable number of
     additional shares as may become issuable to prevent dilution in the event
     of stock splits, stock dividends or similar adjustments of the outstanding
     Common Stock of the Registrant.
(2)  Estimated solely for the purpose of calculating the registration fee
     pursuant to Rule 457(h), based upon the average of the high and low prices
     of a share of the Registrant's Common Stock for January 12, 2000 as
     reported on the New York Stock Exchange and in The Wall Street Journal on
     January 13, 2000.

================================================================================
2

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

         This Registration Statement on Form S-8 is being filed solely to
register additional securities. In accordance with General Instruction E of Form
S-8, the Registrant hereby incorporates by reference the contents of the
Registrant's registration statement on Form S-8 (No. 333-78979), filed with the
Securities and Exchange Commission relating to the El Paso Energy Corporation
Omnibus Plan for Management Employees.

ITEM 8.  EXHIBITS.

       EXHIBIT
       NUMBER         DESCRIPTION
       -------        -----------
        5.1           Opinion of Andrews & Kurth L.L.P. regarding the legality
                      of the securities being registered hereunder.

       10.1           El Paso Energy Corporation Omnibus Plan for Management
                      Employees, Amended and Restated as of December 3, 1999.

       23.1           Consent of Counsel (included in the opinion filed as
                      Exhibit 5.1 to this Registration Statement).

       23.2           Consent of PricewaterhouseCoopers LLP.

       24.1           Power of Attorney (set forth on the signature page
                      contained  in Part II of this Registration Statement).

ITEM 9.  UNDERTAKINGS.

         (a)      The undersigned Registrant hereby undertakes:

                  (1) To file, during any period in which offers or sales are
         being made, a post-effective amendment to this Registration Statement:

                           (i)  To include any prospectus required by Section
                  10(a)(3) of the Securities Act;

                           (ii) To reflect in the prospectus any facts or events
                  arising after the effective date of this Registration
                  Statement (or the most recent post-effective amendment
                  thereof) which, individually or in the aggregate, represent a
                  fundamental change in the information set forth in this
                  Registration Statement;
3

                           (iii) To include any material information with
                  respect to the plan of distribution not previously disclosed
                  in the Registration Statement or any material change to such
                  information in this Registration Statement;

                  Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do
         not apply if the information required to be included in a
         post-effective amendment by those paragraphs is contained in periodic
         reports filed with or furnished to the Commission by the registrant
         pursuant to Section 13 or Section 15(d) of the Exchange Act that are
         incorporated by reference in the Registration Statement.

                  (2) That, for the purpose of determining any liability under
         the Securities Act, each such post-effective amendment shall be deemed
         to be a new registration statement relating to the securities offered
         therein, and the offering of such securities at that time shall be
         deemed to be the initial bona fide offering thereof.

                  (3) To remove from registration by means of a post-effective
         amendment any of the securities being registered which remain unsold at
         the termination of the offering.

         (b) The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange
Act that is incorporated by reference in this Registration Statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

         (c) Insofar as indemnification for liabilities arising under the
Securities Act may be permitted to directors, officers and controlling persons
of the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Securities Act and
is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.
4

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Houston, State of Texas, on this 14th day of January,
2000.

                                      EL PASO ENERGY CORPORATION

                                      By: /s/ William A. Wise
                                          --------------------------------------
                                          WILLIAM A. WISE
                                          President and Chief Executive Officer

                                POWER OF ATTORNEY

         Each person whose individual signature appears below hereby authorizes
H. Brent Austin and Britton White Jr., and each of them, as attorneys-in-fact
with full power of substitution, to execute in the name and on behalf of such
person, individually and in each capacity stated below, and to file, any and all
amendments to this Registration Statement, including any and all post-effective
amendments.

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed by the following persons in the
capacities and on the dates as indicated.
Signature                                     Title                                     Date
      ---------                                     -----                                     ----
/s/ William A. Wise                     President, Chief Executive                      January 14, 2000
--------------------------------        Officer and Director
William A. Wise

/s/ H. Brent Austin                     Executive Vice President                        January 14, 2000
--------------------------------        and Chief Financial Officer
H. Brent Austin

/s/ Jeffrey I. Beason                   Senior Vice President and Controller            January 14, 2000
--------------------------------        (Chief Accounting Officer)
Jeffrey I. Beason
5
/s/ Ronald L. Kuehn, Jr.                Chairman of the Board                           January 14, 2000
--------------------------------
Ronald L. Kuehn, Jr.

/s/ Byron Allumbaugh                    Director                                        January 14, 2000
--------------------------------
Byron Allumbaugh

/s/ Juan Carlos Braniff                 Director                                        January 14, 2000
--------------------------------
Juan Carlos Braniff

/s/ James F. Gibbons                    Director                                        January 14, 2000
--------------------------------
James F. Gibbons

/s/ Ben F. Love                         Director                                        January 14, 2000
--------------------------------
Ben F. Love

/s/ Max L. Lukens                       Director                                        January 14, 2000
--------------------------------
Max L. Lukens

/s/ Kenneth L. Smalley                  Director                                        January 14, 2000
--------------------------------
Kenneth L. Smalley

/s/ Adrian M. Tocklin                   Director                                        January 14, 2000
--------------------------------
Adrian M. Tocklin

/s/ Malcolm Wallop                      Director                                        January 14, 2000
--------------------------------
Malcolm Wallop

/s/ Joe B. Wyatt                        Director                                        January 14, 2000
--------------------------------
Joe B. Wyatt

/s/ Selim K.Zilkha                      Director                                        January 14, 2000
--------------------------------
Selim K. Zilkha
6

                                  EXHIBIT INDEX
EXHIBIT
NUMBER      DESCRIPTION
-------     -----------
5.1        Opinion of Andrews & Kurth L.L.P. regarding the legality
            of the securities being registered hereunder.

10.1        El Paso Energy Corporation Omnibus Plan for Management
            Employees, Amended and Restated as of December 3, 1999.

23.1        Consent of Counsel (included in the opinion filed as
            Exhibit 5.1 to this Registration Statement).

23.2        Consent of PricewaterhouseCoopers LLP.

24.1        Power of Attorney (set forth on the signature page
            contained  in Part II of this Registration Statement).