=============================================================================
                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                 SCHEDULE 13D

      INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a)
                AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)

                              (Amendment No. 1)1

                                  Seitel, Inc.
                ------------------------------------------------
                                (Name of Issuer)

                        Common Stock, $0.01 Par Value
                ------------------------------------------------
                         (Title of Class of Securities)

                                  816074405
                ------------------------------------------------
                                (CUSIP Number)

                             George F. Hamel, Jr.
                              ValueAct Capital
                        435 Pacific Avenue, Fourth Floor
                           San Francisco, CA 94133
                              (415) 362-3700
                ------------------------------------------------
               (Name, Address and Telephone Number of Person
              Authorized to Receive Notices and Communications)

                                July 21, 2004
                ------------------------------------------------
           (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is
filing this schedule because of Rule 240.13d-1(b)(e), 240.13d-1(f) or
240.13d-1(g) check the following box [ ].

NOTE: Schedules filed in paper format shall include a signed original and
five copies of the schedule, including all exhibits.  See Rule 240.13d-7(b)
for other parties to whom copies are to be sent

1The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which
would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section
of the Act but shall be subject to all other provisions of the Act (however,
see the Notes).
=============================================================================


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 816074405                                              Page 2 of 16
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Capital Partners, L.P.
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

    WC*
-----------------------------------------------------------------------------
5.  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
    PURSUANT TO ITEMS 2(d) or 2(e)                                        [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

    Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         8,621,635**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                    10.  SHARED DISPOSITIVE POWER
                         8,621,635**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    8,621,635**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    23.9%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
             INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
               (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE
                                ATTESTATION.


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 816074405                                              Page 3 of 16
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Capital Partners II, L.P.
---------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                 (a) [X]
                                                                     (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   WC*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                        [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         1,250,963**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        1,250,963**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,250,963**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    3.5%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
             INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
               (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE
                                ATTESTATION.


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 816074405                                              Page 4 of 16
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   ValueAct Capital International, Ltd.
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   WC*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   British Virgin Islands
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         3,651,509**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        3,651,509**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    3,651,509**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    10.1%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    PN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
             INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
               (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE
                                ATTESTATION.


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 816074405                                              Page 5 of 16
----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   VA Partners, L.L.C.
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   WC*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   Delaware
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         13,524,108**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        13,524,108**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    13,524,108**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    37.5%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    00 (LLC)
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
             INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
               (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE
                                ATTESTATION.


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 816074405                                            Page 6 of 16
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   Jeffrey W. Ubben
---------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

---------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                         [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   United States
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         13,524,108**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        13,524,108**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    13,524,108**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    37.5%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    IN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
             INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
               (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE
                                ATTESTATION.


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 816074405                                              Page 7 of 16
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   George F. Hamel, Jr.
---------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
-----------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                        [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   United States
-----------------------------------------------------------------------------
                   7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES          8.  SHARED VOTING POWER
   BENEFICIALLY         13,524,108**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH     9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        13,524,108**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    13,524,108**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    37.5%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    IN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
             INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
               (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE
                                ATTESTATION.


                                SCHEDULE 13D
--------------------------                          -------------------------
CUSIP NO. 816074405                                             Page 8 of 16
-----------------------------------------------------------------------------
1. NAME OF REPORTING PERSON/S.S. OR I.R.S. INDENTIFICATION NO. OF ABOVE
   PERSON (entities only)

   Peter H. Kamin
-----------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [X]
                                                                      (b) [ ]
---------------------------------------------------------------------------
3. SEC USE ONLY

-----------------------------------------------------------------------------
4. SOURCE OF FUNDS*

   00*
-----------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
   PURSUANT TO ITEMS 2(d) or 2(e)                                        [ ]
-----------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION

   United States
-----------------------------------------------------------------------------
                    7.  SOLE VOTING POWER
                        0
   NUMBER OF       ----------------------------------------------------------
   SHARES           8.  SHARED VOTING POWER
   BENEFICIALLY         13,524,108**
   OWNED BY EACH   ----------------------------------------------------------
   PERSON WITH      9.  SOLE DISPOSITIVE POWER
                        0
                   ----------------------------------------------------------
                   10.  SHARED DISPOSITIVE POWER
                        13,524,108**
-----------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    13,524,108**
-----------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
    CERTAIN SHARES                                                        [ ]
-----------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

    37.5%
-----------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON

    IN
-----------------------------------------------------------------------------
*See Item 3
**See Item 2 and 5
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
             INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
               (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE
                                ATTESTATION.



THE PURPOSE OF THIS AMENDMENT NO. 1 TO SCHEDULE 13D IS TO AMEND THE OWNERSHIP
REPORTS OF THE REPORTING PERSONS. THE INFORMATION BELOW SUPPLEMENTS THE
INFORMATION PREVIOUSLY PROVIDED.

ITEM 1.  SECURITY AND ISSUER.

         This Schedule 13D relates to the common stock, $0.01 par
value per share (the "Common Stock"), of Seitel, Inc., a Delaware
corporation (the "Issuer").  The address of the principal executive
offices of the Issuer is 10811 South Westview Circle Drive, Suite 100,
Building C, Houston, TX  77043.

ITEM 2.  IDENTITY AND BACKGROUND.

         (a), (b), (c) and (f).  This Statement is filed jointly by
(a)ValueAct Capital Partners, L.P. ("ValueAct Partners"), (b) ValueAct
Capital Partners II, L.P. ("ValueAct Partners II"), (c) ValueAct Capital
International, Ltd. ("ValueAct International"), (d) VA Partners, L.L.C. ("VA
Partners"), (e) Jeffrey W. Ubben, (f) George F. Hamel, Jr. and (g) Peter H.
Kamin (collectively, the "Reporting Persons").

         ValueAct Partners and ValueAct Partners II are each Delaware limited
Partnerships. ValueAct International is a Company organized in the British
Virgin Islands. The principal business of each entity is investing in
securities.  Each has a principal business address of 435 Pacific Avenue,
Fourth Floor, San Francisco, California 94133.

         VA Partners is a Delaware limited liability company, the principal
business of which is to render investment management services to ValueAct
International and to serve as the General Partner of ValueAct Partners and
ValueAct Partners II. VA Partners has a principal business address of 435
Pacific Avenue, Fourth Floor, San Francisco, CA  94133.

         (a), (b) and (c). Messrs. Ubben, Hamel and Kamin are each managing
members, principal owners and controlling persons of VA Partners, and
directors and principal executive officers of ValueAct International, and
such activities constitute their principal occupations.  Such individuals are
sometimes collectively referred to herein as the "Managing Members" or
individually as a "Managing Member". Each Managing Member is a United States
citizen and has a principal business address of 435 Pacific Avenue, Fourth
Floor, San Francisco, CA 94133.

         (d) and (e).  None of the entities or persons identified in this
Item 2 has during the past five years been convicted of any criminal
proceeding (excluding traffic violations or similar misdemeanors), nor been a
party to a civil proceeding of a judicial or administrative body of competent
jurisdiction and as a result of such proceeding was or is subject to a
judgment, decree or final order enjoining future violations of, or
prohibiting or mandating activities subject to,  federal or state securities
laws or finding any violation with respect to such  laws.

                               Page 9 of 16



ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

         The source of funds used for the purchase of the Issuer's
securities was the working capital of ValueAct Partners, ValueAct
Partners II and ValueAct International. The aggregate funds used by
these Reporting Persons to make the purchases were $1,124,075.52
$163,261.02 and $476,188.94 respectively.

ITEM 4.  PURPOSE OF TRANSACTION.

         The Reporting Persons have acquired the Issuer's Common Stock and
warrants to purchase Common Stock (the "Purchase Warrants") for investment
purposes, and such purchases have been made in the Reporting Persons'
ordinary course of business.

         In pursuing such investment purposes, the Reporting Persons may
further purchase, hold, vote, trade, dispose or otherwise deal in the Common
Stock or Purchase Warrants at times, and in such manner, as they deem
advisable to benefit from changes in market prices of such Common Stock or
Purchase Warrants, changes in the Issuer's operations, business strategy or
prospects, or from sale or merger of the Issuer.  To evaluate such
alternatives, the Reporting Persons will routinely monitor the Issuer's
operations, prospects, business development, management, competitive and
strategic matters, capital structure, and prevailing market conditions, as
well as alternative investment opportunities, liquidity requirements of the
Reporting Persons and other investment considerations. Consistent with its
investment research methods and evaluation criteria, the Reporting Persons
may discuss such matters with management or directors of the Issuer, other
shareholders, industry analysts, existing or potential strategic partners or
competitors, investment and financing professionals, sources of credit and
other investors.  Such factors and discussions may materially affect, and
result in, the Reporting Persons' modifying their ownership of Common Stock
or Purchase Warrants, exchanging information with the Issuer pursuant to
appropriate confidentiality or similar agreements, proposing changes in the
Issuer's operations, governance or capitalization, or in proposing one or
more of the other actions described in subsections (a) through (j) of Item 4
of Schedule 13D.

         The Reporting Persons reserve the right to formulate other plans
and/or make other proposals, and take such actions with respect to their
investment in the Issuer, including any or all of the actions set forth in
paragraphs (a) through (j) of Item 4 of Schedule 13D, or acquire additional
Common Stock or Purchase Warrants or dispose of all the Common Stock or
Purchase Warrants beneficially owned by them, in public market or privately
negotiated transactions.  The Reporting Persons may at any time reconsider
and change their plans or proposals relating to the foregoing.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER

         (a), (b).  Set forth below is the beneficial ownership of shares of
Common Stock of the Issuer for each person named in Item 2.  Shares reported
as beneficially owned by each of ValueAct Partners, ValueAct Partners II and
ValueAct International are also reported as beneficially owned by VA
Partners, as investment manager or General Partner of each of such investment
partnerships, and by the Managing Members as controlling persons of the
General Partner. VA Partners and the Managing Members also, directly or

                               Page 10 of 16



indirectly, may own interests in one or both of such partnerships from time
to time. Unless otherwise indicated below, by reason of such relationships
each of the partnerships is reported as having shared power to vote or to
direct the vote, and shared power to dispose or direct the disposition of,
such shares of Common Stock with VA Partners and the Managing Members.

ValueAct Partners is the beneficial owner of 8,621,635 shares of Common
Stock (including 6,793,791 shares issuable upon exercise of Purchase
Warrants), representing approximately 23.9% of the Issuer's outstanding
Common Stock. ValueAct Partners II is the beneficial owner of 1,250,963
shares of Common Stock (including 985,751 shares issuable upon exercise
of Purchase Warrants), representing approximately 3.5% of the Issuer's
outstanding Common Stock. ValueAct International is the beneficial owner
of 3,651,509 shares of Common Stock (including 2,877,365 issuable upon
exercise of Purchase Warrants), representing approximately 10.1% of the
Issuer's outstanding Common Stock. VA Partners and each of the Managing
Members may be deemed the beneficial owner of an aggregate of 13,524,108
shares of Issuer Common Stock (including 10,656,908 shares issuable upon
exercise of Purchase Warrants), representing approximately 37.5% of the
Issuer's outstanding Common Stock. All percentages set forth in this
Schedule 13D assume that the Issuer has 36,032,591 outstanding shares of
Common Stock. This includes 25,375,683 outstanding shares as reported in
the Issuer's S-1 Registration Statement filed July 2, 2004 and the
issuants of an additional 10,656,908 shares upon the exercise of
2,163,400 Purchase Warrants beneficially owned by the Reporting Persons.
One Purchase Warrant represents the right to purchase 4.926 shares of the
Issuer's Common Stock, at an exercise price of $.60 per share,
exercisable at any time during the period ending on 08/02/04.

(c) The  following  transactions  in the  Issuer's  Common  Stock and
Purchase Warrants  were effected by the Reporting  Persons during the
sixty (60) days preceding the date of this report. All of such
transactions represent open market transactions.

                          Trade Date     Shares    Price/Share
             	        ---------      -------   -----------
Common Stock
ValueAct Capital          07-19-04      15,938     $1.23
                          07-21-04      15,938     $1.23
                          07-22-04      15,938     $1.17
                          07-23-04      11,475     $1.20
                          07-26-04      47,813     $1.08
                          07-27-04       9,563     $0.96

ValueAct Capital II
                          07-19-04       2,312     $1.23
                          07-21-04       2,312     $1.23
                          07-22-04       2,312     $1.17
                          07-23-04       1,665     $1.20
                          07-26-04       6,937     $1.08
                          07-27-04       1,387     $0.96


                               Page 11 of 16



ValueAct International
                          07-19-04       6,750     $1.23
                          07-21-04       6,750     $1.23
                          07-22-04       6,750     $1.17
                          07-23-04       4,860     $1.20
                          07-26-04      20,250     $1.08
                          07-27-04       4,050     $0.96


                                             Price/      Shares
                    Trade Date    Warrants   Warrants  Underlying
                    ---------     -------   ---------  ----------
Purchase Warrants

ValueAct Capital    07-19-04      28,050     $3.05     138,174
                    07-21-04      31,875     $3.09     157,016
                    07-22-04       6,375     $2.95      31,403
                    07-23-04      15,938     $2.90      78,510
                    07-26-04      47,813     $2.24     235,526
                    07-27-04     111,563     $1.81     549,559
                    07-27-04     216,431     $1.91   1,066,139

 ValueAct Capital II
                    07-19-04       4,070     $3.05      20,048
                    07-21-04       4,625     $3.09      22,782
                    07-22-04         925     $2.95       4,556
                    07-23-04       2,312     $2.90      11,388
                    07-26-04       6,937     $2.24      34,171
                    07-27-04      16,187     $1.81      79,737
                    07-27-04      31,404     $1.91     154,696


ValueAct International
                    07-19-04      11,880     $3.05      58,520
                    07-21-04      13,500     $3.09      66,501
                    07-22-04       2,700     $2.95      13,300
                    07-23-04       6,750     $2.90      33,250
                    07-26-04      20,250     $2.24      99,751
                    07-27-04      47,250     $1.81     232,753
                    07-27-04      91,665     $1.91     451,541


                              (d) and (e)  Not applicable.


                               Page 12 of 16

















ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH
RESPECT TO SECURITIES OF THE ISSUER

Other than as described elsewhere in this Report, the Reporting Persons have
no understandings, arrangements, relationships or contracts relating to the
Common Stock which are required to be described hereunder.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS

1. Joint Filing Agreement







                               Page 13 of 16







                                  SIGNATURES

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete
and correct.

                             POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below on this Schedule 13D hereby constitutes and appoints Jeffrey W. Ubben,
George F. Hamel, Jr. and Peter H. Kamin, and each of them, with full power to
act without the other, his true and lawful attorney-in-fact and agent, with
full power of substitution and resubstitution, for him and in his name, place
and stead, in any and all capacities (until revoked in writing) to sign any
and all amendments to this Schedule 13D, and to file the same, with all
exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary fully to all intents and purposes
as he might or could do in person, thereby ratifying and confirming all that
said attorneys-in-fact and agents or any of them, or their or his substitute
or substitutes, may lawfully do or cause to be done by virtue hereof.


                              ValueAct Capital Partners L.P., by
                              VA Partners, L.L.C., its General Partner


                              By:     /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              ValueAct Capital Partners II L.P., by
                              VA Partners, L.L.C., its General Partner


                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              ValueAct Capital International, Ltd., by
                              VA Partners, L.L.C., its investment manager


                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member



                               Page 14 of 16






                              VA Partners, L.L.C.

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              By:    /s/  Jeffrey W. Ubben
                                --------------------------------------
Dated:  July 28, 2004           Jeffrey W. Ubben, Managing Member


                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              By:    /s/  Peter H. Kamin
                                --------------------------------------
Dated:  July 28, 2004           Peter H. Kamin, Managing Member



                               Page 15 of 16



                                   Exhibit A
                           JOINT FILING UNDERTAKING

The undersigned parties hereby agree that the Schedule 13D filed
herewith (and any amendments thereto) relating to the Common Stock of
Seitel, Inc. is being filed jointly on behalf of each of them with the
Securities and Exchange Commission pursuant to Section 13(d) of the
Securities Exchange Act of 1934, as amended.

                              ValueAct Capital Partners L.P., by
                              VA Partners, L.L.C., its General Partner

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              ValueAct Capital Partners II L.P., by
                              VA Partners, L.L.C., its General Partner

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              ValueAct Capital International, Ltd., by
                              VA Partners, L.L.C., its investment manager

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              VA Partners, L.L.C.

                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              By:    /s/  Jeffrey W. Ubben
                                --------------------------------------
Dated:  July 28, 2004           Jeffrey W. Ubben, Managing Member


                              By:    /s/  George F. Hamel, Jr.
                                --------------------------------------
Dated:  July 28, 2004           George F. Hamel, Jr., Managing Member


                              By:    /s/  Peter H. Kamin
                                --------------------------------------
Dated:  July 28, 2004           Peter H. Kamin, Managing Member


                               Page 16 of 16