Document:

Exhibit 10.2

                             PARTICIPATION AGREEMENT
                               (State Lease 19499)

     This Participation Agreement ("Agreement"), effective as of February 11,
2008 ("Effective Date") is made by and between El Paso E&P Company, L.P. ("El
Paso"), Ridgewood Energy Corporation ("Ridgewood") and LLOG Exploration
Offshore, Inc. ("LLOG"). The foregoing may be referred to individually as a
"Party" and collectively as the "Parties".

     WHEREAS, El Paso is the owner of 100% of the interest in that certain Oil
and Gas Lease designated State Lease 19499 (the "Lease"), dated effective
October 10, 2007, made by and between the State of Louisiana, as Lessor, and
Cypress Energy Corporation, as Lessee, covering portions of Blocks 213 and 293,
South Marsh Island Area, Iberia Parish, Louisiana, and containing approximately
1,359.78 acres as therein described;

     WHEREAS, El Paso has identified an exploratory prospect on the Lease and
proposes to drill the State Lease 19499 Well No. 1 (the "Test Well") to test an
exploratory objective within such prospect; and

     WHEREAS, Ridgewood and LLOG (collectively, the "Participants") have
indicated their desire to participate in the cost, risk and expense of drilling
the Test Well to earn an undivided interest in and to the Lease as herein
provided, together with a like interest in and to the Test Well, all production
therefrom and all personal property and equipment associated therewith;

     NOW, THEREFORE, for a good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Parties agree as follows:

1.   Test Well Participation

     (a) Test Well. On or before April 30, 2008, El Paso, as "Operator", will
commence, or cause to be commenced, drilling operations on the Test Well, the
estimated cost of which is described in the Authorization for Expenditure
("AFE") attached as Exhibit "A" and thereafter continuously prosecute the
drilling of the Test Well in a good and workmanlike manner to Casing Point.
"Casing Point" shall mean that point in time when the well has reached its
Objective Depth, or such other depth as may be mutually agreed by the Parties,
and all logs, cores and other tests have been completed that in the opinion of
the Operator are sufficient to make a determination concerning the running of
production casing or the plugging and abandonment of the well, and the results
thereof have been furnished to the Participants together with Operator's
recommendation. The Test Well will be drilled as a vertical well from a surface
location that is approximately 2,195 feet from the North line and 4,690 feet
from the West line of South Marsh Island Area Block 213 to (i) 16,500 feet TVD
(16,500 feet MD) or (ii) a depth sufficient to test the Rob L section, as seen
on the Array Induction-GR log of the McMoRan South Marsh Island 217 #223 Well
between the depths of 13,900' and 16,100' MD, whichever is the lesser depth (the
"Objective Depth").

Participation Agreement
(State Lease 19499)

<PAGE>

     (b) Proportionate Cost Sharing. The cost, risk and expense of the Test Well
shall be borne by the Participants as follows:

                                      Working Interest Cost Allocation
                                      --------------------------------
        Participant          Before Casing Point             After Casing Point

        Ridgewood                      45%                            30%
           LLOG                        30%                            20%

Until such time as (i) the Test Well reaches Casing Point or (ii) the actual
costs associated with the Test Well (including the costs of any Substitute Well
drilled therefor in accordance with Section 1(c)) are equal to 110% of the AFE,
whichever is sooner, Participants shall bear their Before Casing Point working
interest share of costs. Except as otherwise provided herein, after such point
in time, they shall bear their After Casing Point working interest share of
costs. In the event the Parties agree to complete, or temporarily abandon such
Well in an effort to subsequently complete it, the Participants shall pay for
and bear their After Casing Point working interest share of costs, as well as
for all future expenditures on the Lease, subject to the provisions set forth in
the Operating Agreement.

     (c) Substitute Well. If, prior to reaching the Objective Depth, the Test
Well encounters mechanical difficulties, heaving shale, rock salt, excessive
saltwater flow, practicably impenetrable formations or other conditions in the
hole that would cause a reasonably prudent operator under the same or similar
circumstances to discontinue drilling and to abandon the Test Well, El Paso
shall have the right, within one hundred twenty (120) days after the rig was
released from the last operation on the Test Well, to commence drilling of a
substitute well ("Substitute Well") at a mutually agreeable location. A proposal
to sidetrack the Test Well around an obstruction in the wellbore will not be
considered a Substitute Well but a continuation of the Test Well, unless the
targeted bottom hole location of the sidetracked well is more than 200' from the
original proposed bottom hole location. Any Substitute Well proposal shall
include the estimated costs to drill to the Test Well Objective Depth, and each
of the Participants shall have the option, but not the obligation, to
participate in such Substitute Well. If a Participant elects to not participate
in a Substitute Well, then it will forfeit all rights hereunder but will
continue to be obligated for its proportionate share of any and all costs and
liabilities incurred in connection with all prior Test Well operations in which
it participated. If El Paso elects to drill a Substitute Well, such Substitute
Well shall be considered and treated for all purposes hereof as though the same
were the Test Well.

     (d) Shallow Rights Well. In the event that the Test Well and/or any
Substitute Well fails to reach Objective Depth but is capable of producing in
paying quantities and otherwise meets all of the earning and reimbursement
requirements provided in Section 3, then Participants shall bee entitled to
receive an assignment of their respective undivided interest in and to the Lease
INSOFAR and ONLY INSOFAR as the Lease covers depths from the surface down to
100' below the base of the stratigraphic equivalent of the deepest geological
horizon that meets the criteria of 30 CFR 250.115 or 30 CFR 250.116 as being
capable of producing in commercial quantities in such shallow earning well
("Shallow Rights Well"), subject to the terms and conditions set forth in
Section 3.

Participation Agreement                2
(State Lease 19499)

<PAGE>

     (d) Additional Well. If the Test Well (including any Substitute Well
drilled therefor) is completed as a Shallow Rights Well, then the Parties,
individually and collectively, shall have the option, but not the obligation, to
maintain each of their respective right hereunder to earn an assignment pursuant
to Section 3 by commencing the actual drilling of another well ("Additional
Well") within 180 days after release of the drilling rig from the preceding
well. Such Additional Well shall be drilled to Objective Depth or deeper, and
proposed in the same manner as, and subject to the same terms and conditions
for, the Test Well. If a Participant has participated in the Additional Well to
Casing Point, and has satisfied the other conditions of Section 3, then such
Participant shall be entitled to an assignment of its undivided After Casing
Point interest in and to the Lease (SAVE AND EXCEPT the interests assigned in
the Shallow Rights Well) as otherwise provided in Section 3. Failure to commence
actual drilling operations on the Additional Well within such 180 day period
shall cause this Agreement to terminate as to all depths not previously earned
hereunder.

2.   Sunk Costs. Within five (5) business days of the execution of this
Agreement, the Participants will reimburse El Paso for their proportionate
shares of El Paso's sunk land (bonus and rental) costs ("Sunk Costs"), which
were incurred by El Paso for the acquisition of the Lease as follows:

                Ridgewood                            $1,129,977.18
                LLOG                                   $753,318.12

3.   Assignment of Record Title. Unless a Participant earns only rights in a
Shallow Rights Well pursuant to Section 1(d), and provided that it (i) is not in
default under the terms of this Agreement; (ii) has participated in the drilling
of the Test Well (or any Substitute Well drilled therefor) to Casing Point; and
(iii) has reimbursed El Paso for its share of Sunk Costs in accordance with
Section 2, such Participant shall have earned and be entitled to receive an
assignment of its undivided After Casing Point interest in and to the Lease,
effective as of the Effective Date. El Paso shall deliver such assignment to the
Participant(s) no later than thirty (30) days after earning occurs. Such
assignment shall be subject to the terms of this Agreement, the assumption of
its proportionate share of obligations pursuant to the Lease and the Operating
Agreement, and be free of all royalty and overriding royalty burdens except the
Lease Burdens described in Section 5. The assignment shall be on a mutually
agreeable form and subject to approval by the State Mineral Board of the State
of Louisiana.

4.   Operating Agreement. Concurrent with the execution of this Agreement, the
Parties shall enter into an operating agreement substantially in the form
attached as Exhibit "B" ("Operating Agreement") and designating El Paso as
Operator, the terms of which, subject to Section 1 of this Agreement, shall
govern and control all operations proposed and/or conducted upon the Lease,
including, without limitation, the drilling of the Test Well or any Substitute
Well therefor, as well as all subsequent operations conducted by the Parties.
The Test Well (including any Substitute Well therefor) drilled pursuant to this
Agreement shall be deemed to be an Exploratory Well for purposes of the
Operating Agreement. In the event of any conflict between the terms and
conditions of this Agreement and the Operating Agreement, the terms of this
Agreement shall control.

Participation Agreement                3
(State Lease 19499)

<PAGE>

5.   Lease Burdens. El Paso represents and warrants by, through and under El
Paso that the only interest burdening El Paso's interest in the Lease is the
Lessor's twenty-five percent (25%) royalty interest and certain overriding
royalty interests representing a .0258336 interest in the Lease for which Lessor
has not yet secured releases.

6.   Notices. Any notice provided or permitted to be given under this Agreement
shall be in writing, and may be sent by personal delivery, overnight courier,
facsimile or by depositing same in the United States Mail, addressed to the
Party to be notified, postage prepaid, and certified with a return receipt
requested. Notices deposited in the mail in the manner hereinabove described
shall be deemed to have been given and received upon the date of delivery as
shown on the return receipt (or upon the date of attempted delivery where
delivery is refused). Notice served in any other manner shall be deemed to have
been given and received only if and when actually received by the addressee
(confirmation of such receipt by confirmed facsimile transmission being deemed
receipt of communications sent by telecopy or other facsimile means), and when
delivered according to the receipt, if hand-delivered, sent by express courier
or delivery service. For purposes of notice, the addresses of the Parties shall
be as follows:

     If to El Paso:       El Paso E&P Company, L.P.
     -------------        1001 Louisiana Street
                          Houston, Texas 77002
                          Attention:   Casey Jones, Land Manager - GOM/SLA
                          Phone:       (713) 420-5709
                          Facsimile:   (713) 420-4419
                          Email:       doug1as.c.jones@elpaso.com

     If to Participants:  Ridgewood Energy Corporation
     -------------------  11700 Old Katy Road, Suite 280
                          Houston, Texas 77079
                          Attention:   W. Greg Tabor, Executive Vice President
                          Phone:       (281) 293-8449
                          Facsimile:   (281) 293-7391
                          Email:       gtabor@ridgewoodenergy.com

                          LLOG Exploration Offshore, Inc.
                          11700 Old Katy Road, Suite 295
                          Houston, Texas 77079
                          Attention:   K. Scott Spence, Land Manager - GOM Shelf
                          Telephone:   (281) 752-1106
                          Facsimile:   (281) 752-1190
                          Email:       scotts@llog.com

or at such other address and number as a Party shall have previously designated
by written notice given to the other Party in the manner hereinabove set forth.

Participation Agreement                4
(State Lease 19499)

<PAGE>

7.   Additional Provisions.

     (a) Further Assurances. Each of the Parties shall, from time to time and
upon reasonable request, execute, acknowledge, and deliver, or cause to be
executed, acknowledged, and delivered, such instruments, and take such other
action, as may be necessary or advisable, to carry out their respective
obligations under this Agreement.

     (b) Assignment of Agreement. Neither Party shall assign this Agreement or
any of its rights or obligations under this Agreement without obtaining the
prior written consent of the other Party, which consent shall not be
unreasonably withheld; provided, however, that, without the consent of the other
Party, either Party may, upon written notice to the other Party, assign this
Agreement to an Affiliate.

     (c) Applicable Law; Venue. The provisions of this Agreement and the
relationship of the Parties shall be governed and interpreted according to the
laws of the State of Texas without giving effect to principles of conflicts of
laws that would direct application of the laws of another jurisdiction, except
to the extent that it is mandatory that the law of the jurisdiction where the
prospect is located shall apply. Any proceedings arising from or relating to
disputes under this agreement shall be brought and maintained exclusively in the
federal or state courts located in Harris County, Texas, and each Party waives
any objection it may have to venue therein. The Parties hereby agree to a waiver
of trial by jury.

     (d) Severance of Invalid Provisions. In case of a conflict between the
provisions of this Agreement and the provisions of any applicable laws or
regulations, the provisions of the laws or regulations shall govern over the
provisions of this Agreement. If, for any reason and for so long as, any clause
or provision of this Agreement is held by a court of competent jurisdiction to
be illegal, invalid, unenforceable, or unconscionable under any present or
future law (or interpretation thereof), the remainder of this Agreement shall
not be affected by such illegality or invalidity. Any such invalid provision
shall be deemed severed from this Agreement as if this Agreement had been
executed with the invalid provision eliminated. The surviving provisions of this
Agreement shall remain in full force and effect unless the removal of the
invalid provision destroys the legitimate purposes of this Agreement, in which
event this Agreement shall be null and void. The Parties shall negotiate in good
faith for any required modifications to this Agreement.

     (e) Time of the Essence. Time is essential to this Agreement and,
accordingly, all time limits herein shall be strictly construed and enforced.

     (f) Headings for Convenience. All captions, numbering sequences, and
paragraph headings used in this Agreement are inserted for convenience only and
shall in no way define, limit, or describe the scope or intent of this Agreement
or any part thereof.

     (g) Independent Representation. Each Party has had the benefit of
independent legal representation with respect to the subject matter of this
Agreement. Both Parties have participated in the drafting of this Agreement, and
this Agreement shall not be more strictly construed against one Party than the
other on the basis of a Party's role in drafting the Agreement.

Participation Agreement                5
(State Lease 19499)

<PAGE>

     (h) Incorporation of Exhibits. Each of the exhibits attached to this
Agreement is incorporated into this Agreement by reference as fully as if the
text of each exhibit were set forth within the body of this Agreement. In the
event of any conflicts between the provisions of this Agreement or any other
agreement, including any agreement or instrument referenced herein to be
executed by the Parties hereafter or simultaneously herewith, the provisions of
this Agreement shall control.

     (i) Integrated Agreement. This Agreement, together with the attached
Exhibits, represents the final and entire agreement by and between the Parties
with respect to the subject matter hereof. This Agreement supersedes all oral
agreements and previous understandings between the Parties relating to the
subject matter hereof, and may be amended only by an instrument in writing
executed jointly by all the Parties. Each of the Parties acknowledges that no
promise, representation or warranty with respect to the subject matter hereof
has been made other than as expressly set forth herein. A waiver of any breach
or failure to enforce any of the terms or conditions of this Agreement shall not
in any way affect, limit or waive a Party's rights under this Agreement at any
time to enforce strict compliance thereafter with every term or condition of
this Agreement. All representations, warranties, covenants, and agreements
contained in this Agreement or in any exhibit, instrument, certificate, or other
document delivered pursuant to this Agreement shall survive any delivery of, and
shall not be deemed to have merged into, any assignment delivered pursuant
hereto.

     (j) Binding Effect. The terms and provisions of this Agreement shall inure
to the benefit of, and shall be binding upon, the Parties, their respective
successors and permitted assigns.

     (k) Third Party Beneficiaries. This Agreement does not benefit or create
any rights in any person or entity not a Party to this Agreement.

     (l) Relationship of the Parties. The rights and obligations of the Parties
hereunder shall be individual, separate, and several and not joint and
collective. It is expressly agreed that the Parties do not intend to create, and
it is not the purpose or intention of this Agreement to create, and this
Agreement shall never be construed as creating, a joint venture, mining
partnership, or other relationship whereby any Party will be liable for the
acts, either of omission or commission, of any other Party; provided, however,
the Parties shall enter into a tax partnership in the form attached as Exhibit
"C".

     (m) Limitation on Damages. In no event shall a Party be entitled to
consequential, incidental, special, treble, exemplary or punitive damages
hereunder unless such damages are a part of third party Claims for which a Party
is entitled to indemnification hereunder.

     (n) Expenses. Each Party to this Agreement shall pay its own expenses
(including legal fees and expenses) incurred in connection with the negotiation,
execution and delivery of this Agreement.

Participation Agreement                6
(State Lease 19499)

<PAGE>

     (o) Insurance. In connection with any drilling and/or production operations
on or for the benefit of the Parties, each Party shall carry the type and amount
of insurance required by the Operating Agreement.

     (p) Confidentiality. Except for necessary disclosures to governmental
agencies, no Party shall release any geological, geophysical, or reservoir
information or any logs or other information pertaining to the progress, tests,
or results of any well drilled pursuant to this Agreement, except as provided
for in the confidentiality provisions of the Operating Agreement.

     (q) McMoRan Farmin. Should El Paso acquire a farmin from McMoRan on a
portion of State Lease 340 in SMI 213 and/or SMI 293 ("Farmin Area"), and the
working interest acquired by El Paso is at least 75%, then Ridgewood and LLOG
shall be entitled to acquire an interest in the Farmin Area, on the same basis
and terms as El Paso, equal to their After Casing Point Working Interest,
proportionately reduced to the interest initially acquired by El Paso.

     (r) Counterparts. This Agreement may be executed in multiple counterparts,
each of which shall be deemed an original and all of which together shall
constitute one and the same instrument.

                            [Signature Page Follows]

Participation Agreement                7
(State Lease 19499)

<PAGE>

     IN WITNESS WHEREOF, the Parties have executed this Agreement to be
effective as of the Effective Date.

                                                                   [LEGAL DEPT.
                                                                      STAMP]

WITNESSES:                               El Paso E&P Company, L.P.

/s/ Nicholas J. Pieper                    By:   /s/ Casey Jones
----------------------                          ---------------
Printed Name: Nicholas J. Pieper          Name:  Casey Jones
              ------------------          Title: Agent and Attorney in Fact

/s/ Teresa A. Walker
--------------------
Printed Name: Teresa A. Walker
              ----------------

WITNESSES:                               Ridgewood Energy Corporation

/s/ V. Chavez                            By:    /s/ W. Greg Tabor
-------------                                   -----------------
Printed Name: V. Chavez                  Name:  W. Greg Tabor
              ---------                  Title: Executive Vice President

/s/ Michael AltoBelli
---------------------
Printed Name: Michael AltoBelli
              -----------------

WITNESSES:                               LLOG Exploration Offshore, Inc.

/s/ Michael AltoBelli                    By:    /s/ K. Scott Spence
---------------------                           -------------------
Printed Name: Michael AltoBelli          Name:  K. Scott Spence
              -----------------          Title: Land Manager

/s/ Zoe Berdie
--------------
Printed Name: Zoe Berdie
              ----------

Participation Agreement                8
(State Lease 19499)

<PAGE>
                                   EXHIBIT "A"

       Made a part of that certain Participation Agreement dated effective
    February 11, 2008, by and between El Paso E&P Company, L.P., as Operator,
       Ridgewood Energy Corporation and LLOG Exploration Offshore, Inc, as
    Non-Operators, covering State Lease No. 19499, being a portion of Blocks
             213 and 293, South Marsh Island Area, Iberia Parish LA.

[EL PASO LOGO]              Approval for Expenditure
                            ------------------------

Project Name:        SL 19499 #1 SMI 213 D & E       Project Type:   EXPDR
Operator:            EL PASO E&P COMPANY LP          Budget ID:      EXPDR
Field Name:          GENERAL OFFSHORE CENTRAL        Project No.:    127927
Property Name:       SL 19499 #1 WELL                Property No.:   10008161
Division:            GOM S LOUISIANA                 Budgeted:       Y
Requested By:        Truitt, Michael S(Mi            Requested       02/11/2008
Project Description:                                 Budget Year:    2008

This Seed AFE is requested for funds to build the location at South Marsh Island
Blk 213 SL 19499 #1 This AFE will be supplemented at a later date for the full
AFE cost to Drill & Evalute the well

The attached supplement is for funds to Drill & Evaluate the SL 19499 #1, South
Marsh Island Blk 213 to a depth of 16,500' MD / TVD
<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------------
Working Interests
-----------------
Company Co   Company Name                          WI%          Original        Supplement              Total
----------   ------------                          ---          --------        ----------              -----
<S>          <C>                            <C>            <C>             <C>                <C>
654          El Paso E&P Company, L.P.       25.000000       $375,000.00     $4,192,175.00      $4,567,175.00
Other        Ridgewood                       45.000000       $675,000.00     $7,545,915.00      $8,220,915.00
Other        LLOG                            30.000000       $450,000.00     $5,030.610.00      $5,480,610.00
                                            100.000000     $1,500,000.00    $16,768,700.00     $18,268,700.00
-------------------------------------------------------------------------------------------------------------

-----------------------------------------------------------------------------------------------
Approvers:
----------
Title                                Name                  Date                    Decision
-----------------------------------------------------------------------------------------------
Mgr, Drilling                        Shelledy, Jack D      2/13/2006  7:19:09AM    Approved
Mgr, Land                            Jones, Douglas C      2/13/2008  8:24:57AM    Approved
Mgr, Reservoir Engineering           Garza, David N        2/25/2006 12:58:04PM    Sent Back
Mgr, Reservoir Engineering           Garza, David N        2/26/2008  1:13:13PM    Approved
Mgr, Exploration                     Evans, Grant          2/26/2008  2:24:39PM    Approved
Mgr, Prod, Ops Eng Completion        Richards, Davis E     2/27/2008  3:02:50PM    Approved
VP. Gulf of Mexico                   Kelly, John P         2/28/2008  7:35:34AM    Approved
-----------------------------------------------------------------------------------------------
</TABLE>

Partner Approvals:                                 E1 Paso Approval:
------------------                                 -----------------

                Accepted & Agreed

Company:     LLOG Exploration Company, L.L.C.        /s/ John P. Kelly
             --------------------------------
Date:        3/11/108
             --------------------------------
Approved by: /s/ K. Scott Spence                     Name: Kelly, John P
             --------------------------------
Title:       Land Manager - GOM Shelf                Title VP, Gulf of Mexico
             --------------------------------

                Accepted & Agreed

Company:     Ridgewood Energy Corporation
             --------------------------------
Date:        February 26, 2008
             --------------------------------
Approved By: /s/ W. Greg Tabor
             --------------------------------
Title:       Executive Vice President
             --------------------------------

This authorization for expenditure (AFE) constitutes a contract between the
non-operator signing the AFE and the operator whereby the non-operator hereby
promises and agrees to pay the operator, within thirty (30) days after billing,
its proportionate share of all reasonable expenditures on the described
operators until such time as an operating agreement is executed.

<PAGE>
<TABLE>
<CAPTION>
                       AUTHORIZATION FOR EXPENDITURE - ID#                     25990

Well or Project Name:                  SL 19499 #1 SMI 213 D & E                     Project Type Code:    EXPDR
Operator:                              EL PASO E&P COMPANY LP                        Budget ID Code:       EXPDR
Country:                               UNITED STATES                                 Project(AFE) No.:     127927
County:                                IBERIA                                        Supplement No.:
State:                                 LOUISIANA                                     Company No.:          654
Sec-Tsp-Rge/Survey/Blk:                                                              Property No.:         10008161
Field Name/Area:                       GENERAL OFFSHORE CENTRAL                      Budgeted Y/N:         Yes
Division:                              GOM S LOUISIANA                               Prepared By/Dept:     Truitt, Michael S(Mike)
                                                                                     Date Prepared:        02/11/2008
------------------------------------------------------------------------------------------------------------------------------------
CostCode Cost Description                      Drill DrillSupplement  Completio CompSupplem   Facilities  FacSupplement        Total
-------- ----------------                      ----- ---------------  --------- -----------   ----------  -------------        -----
<S>      <C>                           <C>             <C>                <C>       <C>             <C>         <C>    <C>
105      Land and Legal Services               $0.00     $150.000.00      $0.00     $0.00           $0.00       $0.00    $150.000.00
111      Location Preparation          $1,500,000.00           $0.00      $0.00     $0.00           $0.00       $0.00  $1,500,000.00
112      Location Restoration                  $0.00     $100,000.00      $0.00     $0.00           $0.00       $0.00    $100,000.00
115      Mobilization                          $0.00     $300,000.00      $0.00     $0.00           $0.00       $0.00    $300,000.00
116      INTLONLY-Import/Export                $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Duties
117      INTLONLY-Nonrec Value                 $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         added taxes (VAT)
118      INTLONLY-Recoupable Value             $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         added taxes (VAT)
121      Footage/Turnkey                       $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
122      Heater/Boiler                         $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
123      Camp and Catering                     $0.00      $38,500.00      $0.00     $0.00           $0.00       $0.00     $38,500.00
125      Contract Drilling - Dayrate           $0.00   $3,696,000.00      $0.00     $0.00           $0.00       $0.00  $3,696,000.00
126      Coil Tubing                           $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
127      Snubbing Unit                         $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
131      Fuel                                  $0.00     $770,000.00      $0.00     $0.00           $0.00       $0.00    $770,000.00
132      Offsite Disposal                      $0.00     $400,000.00      $0.00     $0.00           $0.00       $0.00    $400,000.00
133      Water                                 $0.00       $7,700.00      $0.00     $0.00           $0.00       $0.00      $7,700.00
134      Frac Tanks                            $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
141      Mud and Chemicals                     $0.00   $1,275,000.00      $0.00     $0.00           $0.00       $0.00  $1,275,000.00
142      Solids Control Rental                 $0.00     $269,500.00      $0.00     $0.00           $0.00       $0.00    $269,500.00
         Equipment
143      Shaker Screens                        $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
151      Drillstring/Workstring Rental         $0.00     $192,500.00      $0.00     $0.00           $0.00       $0.00    $192,500.00
         Equipment
152      Directional Tools and Services        $0.00     $275,300.00      $0.00     $0.00           $0.00       $0.00    $275,300.00
153      Fishing Tools and Services            $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
154      Well Control Rentals                  $0.00     $126,200.00      $0.00     $0.00           $0.00       $0.00    $126,200.00
155      Office, Sewage and Misc               $0.00      $50,100.00      $0.00     $0.00           $0.00       $0.00     $50,100.00
         Rentals
156      Monitoring Equipment                  $0.00      $30,800.00      $0.00     $0.00           $0.00       $0.00     $30,800,00
157      Safety/Medical                        $0.00      $23,100.00      $0.00     $0.00           $0.00       $0.00     $23,100.00
161      Cement and Services                   $0.00     $584,400.00      $0.00     $0.00           $0.00       $0.00    $584,400.00
162      Pumping Services                      $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
163      Plugs and Packets                     $0.00      $30,000.00      $0.00     $0.00           $0.00       $0.00     $30,000,00
171      Bits                                  $0.00     $318,800.00      $0.00     $0.00           $0.00       $0.00    $318,800.00
172      Stabilizers and Reamers               $0.00     $212,500.00      $0.00     $0.00           $0.00       $0.00    $212.500,00
181      Open Hole Logging (Incl. SW           $0.00     $550,000.00      $0.00     $0.00           $0.00       $0.00    $550,000.00
         Cores & RFTs)
182      LWD Services                          $0.00     $490,500.00      $0.00     $0.00           $0.00       $0.00    $490,500.00
</TABLE>

                                   Page 1 of 3
<PAGE>
<TABLE>
<CAPTION>
                       AUTHORIZATION FOR EXPENDITURE - ID#                     25990

CostCode Cost Description                      Drill DrillSupplement  Completio CompSupplem  Facilities  FacSupplement         Total
-------- ----------------                      ----- ---------------  --------- -----------  ----------  -------------         -----
<S>      <C>                           <C>             <C>                <C>       <C>             <C>         <C>   <C>
183      Mud Logging                           $0.00     $108,000.00      $0.00     $0.00           $0.00       $0.00    $108,000.00
184      Conventional Coring and DSTs          $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
185      Contract Geo/Paleo                    $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
186      Dull Stem Test Equip                  $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
191      Cased Hole Logging                    $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
192      Perforating                           $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
193      Stimulation (Acid./Frac./             $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Grav. Pk)
194      Slickline Work                        $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
195      Prod. Well Testing Equip./            $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Service
201      Land Transportation                   $0.00     $154,000.00      $0.00     $0.00           $0.00       $0.00    $154,000.00
202      Marine Transportation                 $0.00   $1,386,000.00      $0.00     $0.00           $0.00       $0.00  $1,386,000.00
203      Air Transportation                    $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
211      Supervision - Company                 $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
212      Supervision Contract                  $0.00     $231,000.00      $0.00     $0.00           $0.00       $0.00    $231,000.00
214      Shore Base Expense                    $0.00      $57,800.00      $0.00     $0.00           $0.00       $0.00     $57,800.00
215      Divers                                $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
221      Insurance                             $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
231      Capitalized Overhead                  $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
241      Other Contract Labor                  $0.00      $34,700.00      $0.00     $0.00           $0.00       $0.00     $34,700.00
242      BOP/Wellhead Testing                  $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
251      Casing Crews & Equip & Tong           $0.00     $140,000.00      $0.00     $0.00           $0.00       $0.00    $140,000.00
         Services
252      Laydown/Pickup Services               $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
253      Tubular Testing. Inspection           $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
254      Drillstring/Workstring                $0.00      $50,000.00      $0.00     $0.00           $0.00       $0.00     $50,000.00
         Inspection
255      Communication                         $0.00      $25,400.00      $0.00     $0.00           $0.00       $0.00     $25,400.00
262      Purchased supplies                    $0.00      $15,400.00      $0.00     $0.00           $0.00       $0.00     $15,400.00
271      ABAND EXP/Bundler Services            $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
282      Pipeline Installation                 $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
285      Construction Supervision,             $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Inspection & Testing
         Total Intangibles             $1,500,000.00  $12,093,200.00      $0.00     $0.00           $0.00       $0.00 $13,593,200.00
263      Gas Gathering Materials               $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
264      Gas Gathering Labor                   $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
265      Water Gathering Materials             $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
266      Water Gathering Labor                 $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
291      Casing Sub-Total:                     $0.00   $2,008,100.00      $0.00     $0.00           $0.00       $0.00  $2,008,100.00
         Conductor                             $0.00      $87,100.00      $0.00     $0.00           $0.00       $0.00     $87,100.00
         Conductor #2                          $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Surface                               $0.00     $489,400.00      $0.00     $0.00           $0.00       $0.00    $489,400.00
         Intermediate #1                       $0.00   $1,262,300.00      $0.00     $0.00           $0.00       $0.00  $1,262,300.00
         Intermediate #2                       $0.00           $0.00      $0.00     $0.00           $0.00       $0.00
         Liner #1                              $0.00     $169,300.00      $0.00     $0.00           $0.00       $0.00    $169,300.00
         Liner #2                              $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Production Casing                     $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Production Liner                      $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
301      Tubing Sub-Total:                     $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Tubing 1                              $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Tubing 2                              $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
311      Cementing Equipment                   $0.00      $31,900.00      $0.00     $0.00           $0.00       $0.00     $31,900.00
</TABLE>

                                   Page 2 of 3
<PAGE>
<TABLE>
<CAPTION>
                       AUTHORIZATION FOR EXPENDITURE - ID#                     25990

CostCode Cost Description                      Drill DrillSupplement  Completio CompSupplem  Facilities  FacSupplement         Total
-------- ----------------                      ----- ---------------  --------- -----------  ----------  -------------         -----
<S>      <C>                           <C>            <C>                 <C>       <C>             <C>         <C>   <C>
321      Wellhead Equipment                    $0.00      $90,300.00      $0.00     $0.00           $0.00       $0.00     $90,300.00
331      Artificial Lift Equipment             $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
341      Subsurface Equipment                  $0.00     $185,900.00      $0.00     $0.00           $0.00       $0.00    $185,900.00
351      Onshore Prod Equip and                $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
         Piping install - Labor and
352      Tank Equipment                        $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
333      Compressor Equipment                  $0.00           $0.00      S0.00     $0.00           $0.00       $0.00          $0.00
354      Pipeline Materials                    $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
355      Production Equipment                  $0.00           $0.00      $0.00     $0.00           $0.00       $0.00          $0.00
356      Engine and Starter                    $0.00           $0.00      $0,00     $0.00           $0.00       $0.00          $0.00
         Total Tangibles                       $0.00   $2,316,200.00      $0.00     $0.00           $0.00       $0.00  $2,316,200.00
         Subtotal Tangibles &          $1,500,000.00  $14,409,400.00      $0.00     $0.00           $0.00       $0.00 $15,909,400.00
         Intangibles
         Contingency                           $0.00   $2,359,300.00      $0.00     $0.00           $0.00       $0.00  $2,359,300.00
         Total Cost Estimate           $1,500,000.00  $16,768,700.00      $0.00     $0.00           $0.00       $0.00 $18,268,700.00
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                   Page 3 of 3Exhibit
10.3

PARTICIPATION
AGREEMENT

          This
Participation Agreement is made and entered into this 19th day of May 2008, but
effective January 1 2008, by and between W & T Offshore, Inc., hereinafter
referred to as (“W&T”) and Ridgewood Energy Corporation, hereinafter
referred to as (“REC”), and collectively referred to herein as the Parties
(“Agreement”).

WITNESSETH:

          WHEREAS, W&T is the owner of certain
record title interests in and to certain Federal Oil and Gas Leases as fully
described on Exhibit “A”, attached hereto and the lands covered thereby,
hereinafter referred to as the “Leases”, and      W&T
is the owner and holder of certain leasehold interests in federal leases
currently effective as to Main Pass Block 283 (OCS-G 13662), W/2W/2W/2 of
Viosca Knoll Block 734 (OCS-G 13672) and Main Pass Block 279 (OCS-G 26168); and

          WHEREAS, W&T and REC have executed that
certain Offer to Participate dated May 8, 2008 by which REC may acquire a
twenty-five percent of eight-eighths (25% of 8/8ths) working interest in and to
the Main Pass 283 and Viosca Knoll 734 leases and a fifteen percent of
eight-eighths (15% of 8/8ths) working interest in the Main Pass 279 lease. 

          NOW AND THEREFORE, for and in consideration
of the mutual promises hereinafter contained, W&T and REC agree as follows:

ARTICLE I

	
 

	
 

	
A.

	
W&T represents that it is the owner of 100% of
  the Record Title Interest in Main Pass Block 283 (OCS-G 13662), 100% of the
  Record Title Interest in the W/2W/2W/2 of Viosca Knoll Block 734 (OCS-G
  13672) and 90% of the Record Title Interest in Main Pass Block 279 (OCS-G
  26168), and that W&T has full power and authority to assign an interest
  to REC as to the rights and obligations under the Leases. 

	
 

	
 

	
B.

	
W&T represents by, through and under its own
  acts that W&T’s interest in the Leases is free and clear of all liens and
  encumbrances, less and except Lessor’s royalty, and the overriding royalty
  interest retained herein.

	
 

	
 

	
C.

	
By its execution of this Participation Agreement,
  REC and W&T agrees to execute (1) an operating agreement providing for
  joint operations as to Main Pass Block 283 and the W/2W/2W/2 of Viosca Knoll
  Block 734 in substantially the same form as that attached hereto as Exhibit
  “B” (“the MP 283/VK 734 OA”), (2) an amendment and ratification of that
  certain Operating Agreement dated June 1, 2005 by and between W&T and
  Magnum Hunter Production, Inc. covering Main Pass Block 279 attached hereto
  as Exhibit “C” (“the MP 279 OA”), (3) a production handling agreement as to production processed at the Main
  Pass Block 283 “A” Platform (“Platform”) from the Leases, in substantially
  the same form as that attached hereto as Exhibit “D” (“the PHA”). In the
  event, any of the agreements are not finally executed on or before May 23,
  2008 by W&T and REC, the attached exhibits will be deemed to be in force
  and effect as to all matters provided for therein.

1

ARTICLE
II

	
 

	
 

	
A.

	
By execution of this Participation Agreement, REC
  acknowledges its obligation to participate in the three (3) wells described
  in Exhibit “E” (the “Wells”) and the rig mobilization/demobilization to the
  Main Pass “A” Platform (the “Platform”). Concurrently with execution hereof,
  REC will execute and return to W&T each Authority for Expenditure (“AFE”)
  attached hereto as Exhibits “E-1, E-2, E-3 and E-4”, each AFE describing the
  drilling and evaluation of three (3) Test Wells and the cost associated the
  mobilization and demobilization of the H&P Rig No. 206 to the Platform as
  listed below:

	
 

	
 

	
 

	
 

	
AFE #D07021: Main Pass 283 – OCS-G 13662 Well A-1
  ST-2

	
 

	
 

	
AFE #D07019: Main Pass 279 - OCS-G 26168 Well A-6
  ST-1

	
 

	
 

	
AFE #D07020: Main Pass 279 - OCS-G 26168 Well A-5
  ST-1

	
 

	
 

	
AFE #D07018: Rig Mobilization/Demobilization

	
 

	
 

	
 

	
B.

	
As consideration for the right to acquire interest in
  the Leases, being (1) a twenty-five percent of eight-eighths (25% of 8/8ths)
  working interest in and to Main Pass 283 and the W/2W/2W/2 of Viosca Knoll
  734 and (2) a fifteen-percent of eight-eighths (15% of 8/8ths) working
  interest in Main Pass 279, REC agrees to pay thirty-three and one-third
  percent of eight-eighths (33 1/3% of 8/8ths) of all of the costs, risk and
  expenses in the drilling and evaluation of the MP 283 A-1 ST2 Well as set out
  in AFE #D07021, and twenty percent of eight-eighths (20% of 8/8ths) of all of
  the costs, risk and expenses in the drilling and evaluation of the MP 279 A-6
  Well as set out in AFE #D07019 (the “Promoted Wells”). 

	
 

	
 

	
C.

	
W&T has contracted for the H&P 206 platform
  rig for the drilling of the Wells, and subject to any elections under
  applicable operating agreement, agrees that upon success will complete and
  hook-up the Wells in a successive “back-to-back” order. For the use of any
  existing wellbore or slot on the Main Pass “A” Platform for operations
  conducted under this Agreement or for future joint operations conducted on
  the Leases, a $250,000 per well slot fee will be borne by the well
  participants in proportion to their working interests; such fee to be billed
  by separate invoice.

	
 

	
 

	
D.

	
Within five (5) business days from the execution of
  this Participation Agreement, REC agrees to remit to W&T by wire transfer
  the amount of $$2,106,480.00 representing an advance payment of REC’s
  Promoted Interest share under the MP 283 A-1 ST2 Well AFE. Such payment
  should be wired to:

	
 

	
 

	
 

	
 

	
 

	
Account Name:

	
W & T Offshore, Inc.

	
 

	
 

	
Street Address:

	
Nine Greenway Plaza, Suite 300

	
 

	
 

	
 

	
Houston, TX 77046

	
 

	
 

	
Recipient Bank:

	
Amegy Bank 

	
 

	
 

	
 

	
ABA Routing # 113-011-258

	
 

	
 

	
 

	
Account # 51581996

	
 

	
 

	
W & T’s Tax I.D. Number is 72-1121985. 

	
 

	
 

	
 

	
 

	
If such payment is not received timely, W&T
  shall have the option in its sole discretion to terminate this Participation
  Agreement.

	
 

	
 

	
E.

	
At such time that a Promoted Well reaches Casing
  Point (defined for purposes herein as such time as Promoted Well has been
  drilled to its Objective Depth and evaluated) or, if prior to reaching Casing
  Point, the cumulative costs associated with the drilling of the Promoted Well
  has exceeded 115% of the AFE drill and evaluation cost (the “Promote Cap”),
  REC’s disproportionate cost sharing will cease and as to all further costs
  associated with that Test Well, REC’s working interest share of costs will
  thereafter be 25.00% WI for the MP 283 A-1 ST2 or 15% WI for the MP 279 A-6.
  For clarification purposes, REC’s disproportionate cost spending is
  applicable to the Promoted Wells only in accordance with Article II.B above;
  all other operations including the Main Pass 279 A-5 ST-1, and the
  mobilization or demobilization of the H&P 206 platform rig will be borne
  on a non-promoted basis.

2

	
 

	
 

	
F.

	
Within ten (10) business days after the Main Pass
  283 Well A-1 ST-2 has reached Casing Point and REC has completed the earning
  requirements (Promoted Well participation to Casing Point and made written
  request for an assignment of the earned interest), W&T shall deliver an
  assignment in favor of REC of operating rights equal to twenty-five percent
  of eight-eighths (25% of 8/8ths) in and to the Main Pass Block 283 lease
  (OCS-G 13662) and an assignment of operating rights equal to twenty-five percent
  of eight-eighths (25% of 8/8ths) in and to the W/2W/2W/2 of Viosca Knoll
  Block 734 lease (OSC-G 13672). Within ten (10) business days after the Main
  Pass 279 Well A-6 ST-1 has reached Casing Point and REC has completed the
  earning requirements (Promoted Well participation to Casing Point,
  reimbursement of sunk costs attributable to 15% of the Main Pass 279 lease,
  and made written request for an assignment of the earned interest) W&T
  shall deliver an assignment in favor of REC of record title interest equal to
  fifteen-percent of eight-eighths (15% of 8/8ths) in the Main Pass Block 279
  lease (OSC-G 26168). It is understood however that any rights assigned
  hereunder shall specifically except any existing wellbores (unless utilized
  for REC and W&T joint operations), the Platform and existing pipelines,
  existing production, proven behind pipe reserves, and/or reservoirs which are
  in pressure communication with W&T’s existing production. Such assignment
  shall be in a form acceptable to the Parties and to the MMS and shall be made
  without warranty other
  than by, through and under W&T but with full substitution and  subrogation in and to all
  covenants and warranties of W&T’s predecessors in title, and shall be made subject to the terms
  of (i) this Participation Agreement, (ii) the MP 279 OA, (iii) the MP 283/VK
  734 OA, and (iv) the PHA (which shall provide, among other terms, for fees of
  $.017 per MCF for handling and processing of gas, $1.00 per barrel of oil and
  water, and $0.07 per MCF per stage for compression, and the allocation of
  platform operating expenses among the wells served by the host processing
  facility), and (v) the retention of an overriding royalty by W&T equal to
  the difference between existing lease burdens and eighty percent (80%).

	
 

	
 

	
G.

	
It is understood and agreed that the assignments to
  be conveyed to REC shall deliver a net revenue interest equal to eighty
  percent (80%) proportionately reduced as to REC’s interest as set out below
  of the production recovered from operations conducted under the terms of this
  Participation Agreement.

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
i.

	
 

	
MP 283

	
 

	
25% x 80% = 20% NRI

	
 

	
 

	
ii.

	
 

	
VK 734 (portion)

	
 

	
25% x 80% = 20% NRI

	
 

	
 

	
iii.

	
 

	
MP 279

	
 

	
15% x 80% = 12% NRI

Article
III

	
 

	
 

	
A.

	
EXCEPT WITH RESPECT TO THE SPECIAL WARRANTY OF TITLE
  AS SET FORTH IN ARTICLE II (E), W&T HAS NOT MADE, AND W&T HEREBY
  EXPRESSLY DISCLAIMS AND NEGATES, ANY REPRESENTATION OR WARRANTY, EXPRESS,
  IMPLIED, BY COMMON LAW, BY STATUTE, OR OTHERWISE RELATING TO (i) THE TITLE OR
  CONDITION OF THE LEASES AND CONTRACTS DESCRIBED HEREIN, AND (ii) ANY
  INFORMATION (WHETHER WRITTEN OR ORAL) FURNISHED TO REC BY OR ON BEHALF OF
  W&T (INCLUDING WITHOUT LIMITATION, IN RESPECT OF GEOLOGICAL, GEOPHYSICAL
  AND SEISMIC DATA, THE EXISTANCE OR EXTENT OF OIL, GAS OR OTHER MINERAL
  RESERVES, ANY PRODUCT PRICING ASSUMPTIONS, REC irrevocably waives any and all
  claims it may have against W&T associated with same. This provision does
  not apply to any specific representations or warranties set forth herein.

	
 

	
 

	
B.

	
Except as otherwise expressly provided herein, the
  provisions of this Participation Agreement shall inure to the benefit of, and
  be binding upon, the successors, assigns, heirs, executors and administrators
  of the Parties hereto.

	
 

	
 

	
C.

	
Failure by W&T or REC to enforce any of the
  provisions of this Participation Agreement shall not effect a waiver of any
  violation thereof nor preclude enforcement of that or any other provisions
  hereof at that or any other time.

3

	
 

	
 

	
D.

	
This Participation Agreement, including all Exhibits
  attached hereto, constitutes the full and entire understanding and agreement
  between the Parties relating to the matters herein, and except as otherwise
  provided herein, supersedes any previous agreements or understandings,
  written or oral, in effect between the Parties relating hereto. In the event
  of any conflict between the Parties regarding the terms and conditions of (i)
  this Participation Agreement, (ii) the MP 279 OA, (iii) the MP 283/VK 734 OA,
  and (iv) the PHA, the terms and conditions of this Participation Agreement
  shall prevail and control. The Parties agree to execute any such ancillary
  documents as may be necessary to effect the purposes of this agreement, or as
  may be required by the MMS.

	
 

	
 

	
E.

	
For the purposes of notices pursuant to this
  Agreement:

	
 

	
 

	
 

	
 

	
 

	
 

	
 

	
REC Energy Corporation

	
 

	
W & T Offshore, Inc.

	
 

	
11700 Katy Freeway Suite 280

	
 

	
Nine Greenway Plaza, Suite 300

	
 

	
Houston, Texas 77079

	
 

	
Houston, Texas 77046

	
 

	
Attention:

	
W. Greg Tabor

	
 

	
Attention:

	
Jeanette Wilkins

	
 

	
Phone:

	
281.293.8488

	
 

	
Phone:

	
713.624.7307

	
 

	
Fax:

	
281.293.7391

	
 

	
Fax:

	
713.624.7378

	
 

	
E-mail:

	
gtabor@ridgewoodenergy.com

	
 

	
E-mail:

	
jwilkins@wtoffshore.com

	
 

	
 

	
 

	
For the delivery of data recovered from operations
  conducted hereunder, REC’s Well Information Requirements are attached hereto
  as Exhibit “F” and made a part hereof.

	
 

	
 

	
F.

	
This Participation Agreement shall not be modified
  or amended except by mutual agreement of the Parties in writing, and no
  action or failure to act on the part of either Party hereto shall be
  construed as a modification or amendment to, or a waiver of, any of the
  provisions of this Participation Agreement.

	
 

	
 

	
G.

	
This Agreement shall be governed by and construed in
  accordance with the laws of the State of Texas, without giving effect to its conflicts of
  law provisions. Venue for any claim or causes of action brought under this
  Participation Agreement shall be in Harris County, Texas.

	
 

	
 

	
H.

	
This Agreement and its Exhibits attached hereto
  shall represent the full and final agreement between the Parties and shall
  supersede any prior agreement, whether written or oral, regarding the
  business transaction that is the subject hereof.

	
 

	
 

	
I.

	
This Participation Agreement is not intended to and
  shall not be construed to create any mining partnership, commercial
  partnership, any other partnership or an association for profit between or
  among the Parties.

	
 

	
 

	
J.

	
All notices, requests, demands, and other
  communications provided for or permitted hereunder shall be in writing
  (including telex and telecopy communications) and shall be sent by mail,
  telex, telecopier or hand delivered as provided for in Article III.E. Said
  notices, requests, demands and communications shall be effective upon
  delivery.

4

IN WITNESS WHEREOF, THIS PARTICIPATION AGREEMENT IS
MADE EFFECTIVE AS OF THE EFFECTIVE DATE ABOVE WRITTEN.

	
 

	
 

	
 

	
 

	
Witness:

	
 

	
W & T OFFSHORE, INC.

	
 

	
 

	
 

	
 

	
 

	
 

	
By:

	
 

	

	
 

	
 

	

	
 

	
 

	
 

	
Jamie L. Vazquez

	

	
 

	
 

	
Vice-President

	
 

	
 

	
 

	
 

	
 

	
 

	
RIDGEWOOD ENERGY CORPORATION

	
 

	
 

	
 

	
 

	
 

	
 

	
By:

	
 

	

	
 

	
 

	

	
 

	
 

	
Name:

	
W. Greg Tabor

	

	
 

	
Its: 

	
Executive Vice President

5

EXHIBIT
“A”

Attached
to and made part of that certain Participation Agreement dated the 19th
date of May 2008, but effective January 1, 2008, by and between W & T
Offshore, Inc., and Ridgewood Energy Corporation.

IDENTIFICATION
OF LANDS SUBJECT TO AGREEMENT

I.     All
of Block 279 Main Pass Area

	
 

	
 

	
 

	
That certain Oil and Gas Lease of Submerged Lands
  under the Outer Continental

	
 

	
 

	
 

	
Shelf Lands Act OCS-G 26168 dated effective as of
  July 1, 2004, between the United States of America, as Lessor, and W & T
  Offshore, Inc. as Lessee, covering all of Block 279 Main Pass Area, South and
  East Addition, OCS Leasing Map, Louisiana Map No. 10A, containing
  approximately 4994.55 acres, more or less.

II.     All
of Block 283 Main Pass Area

	
 

	
 

	
 

	
That certain Oil and Gas Lease of Submerged Lands
  under the Outer Continental

	
 

	
 

	
 

	
Shelf Lands Act OCS-G 13662 dated effective as of
  September 1, 1992, between the United States of America, as Lessor, and W
  & T Offshore, Inc. as Lessee, covering all of Block 283 Main Pass Area,
  South and East Addition, OCS Leasing Map, Louisiana Map No. 10A, containing
  approximately 4560.81 acres, more or less.

	
 

	
 

	
III.

	
All of Block 734 Viosca Knoll Area

	
 

	
 

	
 

	
That certain Oil and Gas Lease of Submerged Lands
  under the Outer Continental

	
 

	
 

	
 

	
Shelf Lands Act OCS-G 13672 dated effective as of
  August 1, 1992, between the United States of America, as Lessor, and W &
  T Offshore, Inc. as Lessee, covering all of Block 734 Viosca Knoll Area, OCS
  Official Protraction Diagram, NH 16-7, containing approximately 4195.78
  acres, more or less.

6

EXHIBIT
“E”

Attached to and made part of that certain
Participation Agreement dated the 19th day of May 2008, but effective January
1, 2008, by and between W & T Offshore, Inc., and Ridgewood Energy
Corporation.

WELLS

	
 

	
 

	
 

	
 

	
1.

	
Main Pass 283 – OCS-G 13662 Well A-1 ST-2

	
 

	
 

	
2.

	
Main Pass 279 – OCS-G 26168 Well A-6 ST-1

	
 

	
 

	
3.

	
Main Pass 279 – OCS-G 26168 Well A-5 ST-1

7

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