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AMENDMENT
UNIT AGREEMENT FOR OUTER CONTINENTAL SHELF EXPLORATION,
DEVELOPMENT, AND PRODUCTION OPERATIONS ON THE
ALAMINOS CANYON BLOCK 859 UNIT
ALAMINOS CANYON AREA
OFFSHORE TEXAS o ^ j WJr: 4 3 tei/
UNIT AGREEMENT NO. 754307006
This Amendment ("Amendment") to the Alaminos Canyon Block 859 Unit Agreement,
Contract No. 754307006 (the "AC 859 Unit Agreement") is made as of the Amendment Effective
Date, by Shell Offshore Inc. ("SOI") as Unit Operator under the AC 859 Unit Agreement, along
with the undersigned Working Interest Owners.
WHEREAS, SOI entered into the AC 859 Unit Agreement and was designated the Unit
Operator for unit operations within the Unit Area effective November 1, 2006; and
WHEREAS, effective May 1, 2011, the Minerals Management Service approved the Initial
Participating Area "A" within the Unit Area, containing 1,890 acres in Alaminos Canyon Block
815, Lease OCS-G 19409, for that part of the Unit Area reasonably proven to be capable of
producing in Paying Quantities from the FR12/FR14 Reservoir; and
WHEREAS, effective October 1, 2011, the Bureau of Safety and Environmental
Enforcement ("BSEE") approved Participating Area "B" within the Unit Area, containing 2,160
acres (900 acres in Alaminos Canyon Block 815, OCS-G 19409; and 1,260 acres in Alaminos
Canyon Block 859, OCS-G 20871), for that part of the Unit Area reasonably proven to be capable
of producing in Paying Quantities from the WM12 Reservoir; and
WHEREAS, BSEE approved revised Exhibits "A" and "B" to the AC 859 Unit Agreement
effective December 1, 2015, to reflect the change in the Unit Area resulting from the
implementation of the contraction provision contained in Article XIII (Automatic Adjustment of
Unit Area) of the AC 859 Unit Agreement; and
WHEREAS, pursuant to Article X (Revision of Unit Area) of the AC 859 Unit Agreement,
the Unit Area may be further revised to include additional lands within the common geologic
structure that are necessary for unit operations or capable of producing oil and'or gas in Paying
Quantities, whenever such action appears proper.
NOW, THEREFORE, for good and valuable consideration of the mutual promises
exchanged herein, the undersigned, being the Unit Operator and the Working Interest Owners in
the unitized leases, amend the AC 859 Unit Agreement as follows:
1. The second and third "WHEREAS" clauses in the recitals are hereby amended, as follows:
WHEREAS, pursuant to applicable Regulations, 30 CFR 250.1300, et seq.. it is deemed to
be in the interest of promoting and expediting exploration and development, or prevention
of waste, conservation, or the protection of correlative rights, including Federal royalty
interests, to unitize the oil and gas interest in the Unit Area; and
WHEREAS, it is deemed to be necessary in the interest of promoting and expediting
exploration and development, or prevention of waste, conservation, or the protection of
correlative rights, including Federal royalty interests, to conduct exploration, development,
and production operations in the Unit Area as though the area were subject to a single
lease;
2. Article I (Definitions) is hereby amended to include the following definitions:
AMENDMENT EFFECTIVE DATE is October 1, 2017.
PRE-AMENDMENT UNIT AREA means the portions of Alaminos Canyon Blocks 815
and 859, Leases OCS-G 19409 and OCS-G 20871, respectively, that remained in the unit
after the unit contracted effective December 1, 2015, shown in blue on the attached Exhibit
"A" for illustration purposes but specifically described below:
• The following portions of Alaminos Canyon Block 815, OCS-G19409:
SE/4SE/4NW/4; SW/4SW/4NE/4; E/2SW/4NE/4; SE/4NE/4; NE/4SW/4;
SE/4SW/4; E/2SW/4SW/4; SW/4SW/4SW/4; NW/4SE/4; NW/4NE/4SE/4; and
W/2SW/4SE/4; and
• The following portions of Alaminos Canyon Block 859, OCS-G 20871:
N/2NW/4; SW/4NW/4; NW/4SE/4NW/4; and NW/4NW/4SW/4
EXPANDED UNIT AREA means the lands added to the Unit Area through this
Amendment, consisting of the Blocks, or portions thereof, shown in red on the attached
Exhibit "A" for illustration purposes but specifically described below:
• The S/2 of Alaminos Canyon Block 684, OCS-G 31194; and
• Alaminos Canyon Block 728, OCS-G 31195; and
• Alaminos Canyon Block 771, OCS-G 32988; and
• Alaminos Canyon Block 772, OCS-G 35153.
3. Article III (Unit Area and Exhibits) is hereby amended as follows:
Section 3.2 is deleted in its entirety and replaced with the following:
3.2 Exhibit "A", which is attached to this Agreement and made a part hereof, is a plat
identifying the Pre-Amendment Unit Area and the Expanded Unit Area and
component Blocks and leases, which collectively comprise the Unit Area.
4. Article IX (Plan of Operation) is deleted in its entirety and replaced with the following:
Article IX (Unit Area Plan of Operation)
9.1 Prior to the occurrence of any adjustment of the Unit Area pursuant to the provisions
of Article XIII, the terms and conditions of Sections 9.2,9.3 and 9.4 below shall apply
separately and individually to each of (i) the Pre-Amendment Unit Area, and (ii) the
Expanded Unit Area. During this period, the term "Unit Area" as used in Sections
9.2 and 9.3 below will apply separately and individually to (i) the Pre-Amendment
Unit Area, and (ii) the Expanded Unit Area. Subsequent to any adjustment of the
Unit Area pursuant to the provisions of Article XIII, the term "Unit Area", subject to
the provisions of Article X and Article XVII , will refer collectively to the existing
Participating Areas "A" and "ET that comprise the Pre-Amendment Unit Area, and
any new Participating Area(s) derived from the Expanded Unit Area.
9.2 The Unit Operator shall submit a plan of operation for the Unit Area which describes
scheduled operations for the Participating Area(s) and the non-Participating Areas,
which is consistent with the requirements for Exploration Plans or Development
Operations Coordination Documents as required by the Outer Continental Shelf
Lands Act, Subpart B of 30 CFR Parts 250 and 550, and other sections of applicable
Regulations. All operations within the Unit Area shall be conducted in accordance
with an approved plan.
9.3 When no oil or gas is being produced in Paying Quantities from the Unit Area, and
when all or part of the Unit Area is subject to one or more leases beyond the primary
term, a continuous drilling or well-reworking program shall be maintained with
lapses of no more than a 1-year period per lapse between such operations unless a
suspension of production or other operation has been ordered or approved by the
Regional Supervisor or unless extended pursuant to 30 CFR 250.180(e). Plans may
call for a cessation of drilling operations for a reasonable period of time after the
discovery and delineation of a Reservoir when such a pause in drilling activities is
warranted to permit the design, fabrication, erection, and commissioning of platforms
and other installations needed for development and production operations, provided
a suspension of production or other operation has been ordered or approved by the
Regional Supervisor.
9.4 An acceptable initial plan of operation for the Expanded Unit Area shall be submitted
at the time this Amendment is filed for the Regional Supervisor's approval. Each plan
of operation for the Unit Area shall expire on the date specified in the plan. At least
sixty (60) days before the expiration of any plan, unless the Regional Supervisor
grants an extension for good cause, the Unit Operator shall file an acceptable
subsequent plan of operation for approval in accordance with this Article IX. The
initial and subsequent plans for the Expanded Unit Area should address, but not be
limited to, appraisal and pre-development activities, and schedules for: contracting
Pre-FEED and FEED studies, design and build contracts for facilities, development
infrastructure, the commencement of the fabrication of a new host facility and/or
modification of existing facilities, and the commencement of production from the
Expanded Unit Area. After production commences from the Expanded Unit Area, the
plans should include drilling of wells for developing and producing the entire
Expanded Unit Area.
5. Article X (Revision of Unit Area) is deleted in its entirety and replaced with the
following:
Article X (Revision of Unit .Area)
10.1 The Unit Area may be further revised by additions of areas within the common
geologic structure that are necessary for unit operations or are capable of producing
oil and/or gas in Paying Quantities, whenever such action appears proper for
prevention of waste, conservation of the natural resources, or protection of correlative
rights including Federal royalty interests, pursuant to 30 CFR 250.205 and Part 250
Subpart M. Additionally, the Unit Area may be further revised by the contraction of
the Unit Area when such contraction is necessary or advisable to conform with the
purposes of this Agreement. Such additions or contractions shall be effected by the
Unit Operator on its own motion after preliminary concurrence of the Regional
Supervisor or on demand of the Regional Supervisor. The effective date of any
expansion or contraction of the Unit Area shall be the first of the month following
the date of approval of the expansion or contraction by the Regional Supervisor
provided, however, that a more appropriate effective date may be used if justified by
the Unit Operator and approved by the Regional Supervisor.
10.2 When the revision to the Unit Area occurs after production has commenced and
involves an expansion of an existing Participating Area(s), or the designation of a
new Participating Area, whether requested by the Unit Operator or on demand of the
Regional Supervisor, the Participating Area(s) must be amended consistent with
Section 11.2 of this Agreement.
10.3 Except as provided in Section 13.2, the Unit Area shall not be reduced on account of
the depletion ofthe Unitized Substances for which it was established, but the Unit
Area established under the provisions of this Article X shall tenninate automatically
whenever operations are pennanently abandoned in the unit.
10.4 Effective November 1, 2017, until contraction and unification pursuant to Article
XIII, the Pre-Amendment Unit Area and the Expanded Unit Area are separately and
independently subject to automatic termination when operations are not being
conducted in the relevant area in accordance with Article IX of this Agreement, or a
suspension has not been ordered or approved by the Regional Supervisor for the
relevant area. If either the Pre-Amendment Unit Area or the Expanded Unit Area
terminate automatically, the remaining area will continue to operate under the
provisions of this Agreement.
10.5 If a well is drilled into the stratigraphic equivalent of WM 25 or below, as seen
between the depths of 17,796' SS and 21,823' SS in the Alaminos Canyon Block
772, Well No. 1 ("OCS-G 35153, Well No. 1"), from or into any portion of AC Blocks
815 or 859 that is not included within the Pre-Amendment Unit Area, the aliquot(s)
that contains the surface location, well path, and bottom hole location of the well will
be added into the Expanded Unit Area automatically upon the spudding of the well.
The drilling of such well, including all immediate (without rig departure) re-spud,
bypass, and sidetrack operations required, if any, to adequately test the WM 25 or
below, will be deemed operations with respect to the Expanded Unit Area for
purposes of 30 CFR 250.180 and Article XVII. Additional drilling, including re
entry sidetracks from the aforementioned well, within either AC Blocks 815 or 859
will not be deemed operations with respect to the Expanded Unit Area for purposes
of 30 CFR 250.180 and Article XVII, unless approved by the Regional Supervisor.
In the event a proposed additional well is approved by the Regional Supervisor to be
deemed operations with respect to the Expanded Unit Area for the purposes of 30
CFR 250.180 and Article XVII, the aliquot(s) that contain the surface location, well
path and bottom hole location of the well will be added into the Expanded Unit Area
automatically upon the spudding of the well. Only aliquots that are outside ofthe
Pre-Amendment Unit Area in either AC Blocks 815 or 859 will be added to the
Expanded Unit Area based on the drilling in this Section 10.5. If a well is drilled to
the WM 25 or below under the provisions of this Section 10.5, then the provisions of
Section 17.2 (g) will no longer apply.
10.6 If a well drilled pursuant to Section 10.5 fails to penetrate into the stratigraphic
equivalent of the WM 25 or below, the Unit Operator must present information and
data sufficient to demonstrate to the Regional Supervisor that all reasonable means
were utilized to reach the WM 25 or below and that the addition of an aliquot should
be considered for inclusion into the Expanded Unit Area pursuant to Section 10.5.
10.7 To utilize Section 10.5 for purposes of continuing the lease terms of all lands in the
Expanded Unit Area, the Unit Operator must present the relevant well infomiation to
BSEE prior to spudding the well and after the Application for Permit to Drill (APD)
is accepted into review by the relevant BSEE office. The Unit Operator must present
to BSEE sufficient information showing that there is a demonstrated and objective
intent to test the stratigraphic equivalent of WM 25 or below as seen in OCS-G 35153,
Well No. 1. Information submitted should include, but not be limited to, all the
information submitted with the APD, additional geological and geophysics
information, and interpreted data.
6. Article XI (Participating Area) is amended as follows:
Section 11.1 is deleted in its entirety and replaced with the following:
11.1 Prior to commencement of production of Unitized Substances from the Expanded Unit
Area, or as soon thereafter as required by the Regional Supervisor, the Unit Operator
shall submit to the Regional Supervisor a revised Exhibit "C," expanded to include a
schedule by lease of (a) all land from the Expanded Unit Area reasonably proven to
be productive of Unitized Substances in Paying Quantities by the drilling and
completion of producible wells, geological and geophysical information, and'or
engineering data, and (b) the percentage of Unitized Substances to be allocated, as
provided in Article XII, to each relevant lease from the Expanded Unit Area, and from
additional land reasonably proven to be productive within Alaminos Canyon Blocks
815 and 859. This Exhibit C will reflect both the existing approved or current
Participating Areas of the Pre-Amendment Unit Area as well as the new Participating
Area(s) ofthe Expanded Unit Area, though production from each area (i.e., the Pre-
Amendment Unit Area and Expanded Unit Area) will be allocated by the revision
and approval of the established separate Participating Areas or the establishment and
approval of new separate Participating Area(s). Upon approval of the revised Exhibit
"C" by the Regional Supervisor, any Participating Area(s) covering the Expanded
Unit Area shall constitute the initial Participating Area of the Expanded Unit .Area,
effective as of the date such production commences. In order to protect correlative
rights, including Federal royalty interests, and pursuant to 30 CFR 250.205 and Part
250 Subpart M, where a producing or injection well could intersect or drain an
adjacent property, the Regional Supervisor may, in his discretion, require such lands
to be included in the Participating Area, including lands with higher royalty rate leases
or leases with a different royalty suspension volume (RSV). The Participating Area
shall be described in parcels no smaller than 1/4 x 1/4 x 1/4 blocks.
7. Article XIII (Automatic Adjustment of Unit Area) is deleted in its entirety and replaced
with the following:
Article XIII (Automatic Adjustment of Unit Area)
13.1 Any lease(s) in the Expanded Unit Area not entitled to receive an allocation of unit
production two years after the commencement of production from the Expanded Unit
Area shall be eliminated automatically from the Unit Area. Effective the date of such
contraction of the Unit Area, and subject to the provisions of Articles X and XVII,
the Pre-Amendment Unit Area and any new Participating Area(s) derived from the
Expanded Unit Area shall collectively constitute the revised Unit Area.
13.2 If no production, drilling, well reworking or other operations pursuant to Section 9.3
are being conducted in one of the separate Participating Areas approved in the
schedule(s) under Article XI. that Participating Area will terminate. In the event a
Participating .Area tenninates, all leases wholly or partially contained therein will no
longer be subject to this Agreement or the Unit Operating Agreement unless (a) such
leases are receiving an allocation from another Participating Area or (b) there has not
been an automatic adjustment ofthe Expanded Unit Area pursuant to Section 13.1
and such leases contain a well drilled pursuant to either Section 10.5 or Section 17.2
(g). In the event of Section 13.2(b), any aliquots containing the surface location, well
path, and bottom hole location of that well that are not already in the Expanded Unit
Area, will automatically become part of the Expanded Unit .Area concunently with
the termination of the last Participating Area containing those aliquots.
13.3 If a lease is no longer subject to this Agreement in accordance with the provisions of
this Article XIII. that lease shall only be maintained and continued in force and effect
in accordance with the terms and provisions contained in the Act, Regulations, and
the lease.
Article XVII (Leases and Contracts Conformed and Extended) is amended to modify
Section 17.2 (a) and insert new Sections 17.2 (e), (f), (g), and (h) to read as follows:
17.2
(a) Except as provided in Section 10.3 and Section 13.2, drilling and/or producing
operations performed hereunder upon any unitized lease will be accepted and
deemed to be performed upon and for the benefit of each and every unitized lease,
and no lease committed to this Agreement shall be deemed to expire by reason of
failure to drill or produce a well thereon.
(e) Prior to the effective date ofthe automatic adjustment described in Section 13.1,
the foregoing Sections 17.2 (a) - (d) will apply separately and independently to
the unitized lands in the Pre-Amendment Unit Area and the unitized lands in the
Expanded Unit Area.
(f) The Pre-Amendment Unit Area and the Expanded Unit Area will comprise a
single revised Unit Area effective on the date of automatic adjustment stipulated
in Section 13.1.
(g) Notwithstanding Section 17.2 (e), the drilling of a well into the stratigraphic
equivalent of WM 25 or below, as seen between the depths of 17,789' SS and
21,390' SS in OCS-G 35153, Well No. 1, from anywhere in the Pre-Amendment
Unit .Area will operate as an appraisal well for the benefit of the Expanded Unit
.Area. The drilling of such well, including all immediate (without rig departure)
re-spud, bypass, or sidetrack operations required, if any, to adequately test the
WM 25 or below, will be deemed operations with respect to the Expanded Unit
Area for purposes of 30 CFR 250.180 and this Article XVII. Additional drilling,
including re-entry sidetracks from the aforementioned well, within either AC
Blocks 815 or 859 will not be deemed operations with respect to the Expanded
Unit Area for purposes of 30 CFR 250.180 and this .Article XVTt, unless approved
by the Regional Supervisor. In the event a proposed additional well is approved
by the Regional Supervisor to be deemed operations with respect to the Expanded
Unit Area for purposes of 30 CFR 250.180, the aliquot(s) that reflects the surface
location, well path, and bottom hole location of the well will be added into the
Expanded Unit Area automatically upon the spudding of the well. Only aliquots
that are outside of the Pre-Amendment Unit Area in either AC Blocks 815 or 859
will be added to the Expanded Unit Area based on the drilling discussed in this
Article XVII. If a well is drilled to the WM 25 or below under the provisions of
this Article XVII, then the provisions of Section 10.5 will no longer apply.
(h) To utilize Section 17.2 (g) for purposes of continuing the lease terms of all lands
in the Expanded Unit Area, tlie Unit Operator must present the relevant well
information to BSEE prior to spudding the well and after the APD is accepted
into review by the relevant BSEE office. The Unit Operator must present to BSEE
sufficient infonnation showing that there is a demonstrated and objective intent
to test the stratigraphic equivalent of WM 25 or below as seen in OCS-G 35153,
Well No. 1. Infonnation submitted should include, but not be limited to, all the
information submitted with the APD, additional geological and geophysics
infonnation, and interpreted data.
9. Article XX (Remedies) of the Unit Agreement is hereby amended to insert new Section
20.3, to read as follows:
20.3 Prior to the effective date of the automatic adjustment described in Section 13.1, a
determination of Unit Operator failure pursuant to Section 20.1 will be administered
separately and individually for the Expanded Unit Area and the Pre-Amendment Unit
Area, respectively, and will be effective only as to unitized lands within the particular
area for which the determination is reached. A determination of default and
subsequent failure to remedy may result in a termination of the Pre-Amendment Unit
Area or the Expanded Unit Area without affecting the continuation of this Agreement
with respect to the other area.
10. As of the Amendment Effective Date, Exhibits "A" and "B" shall be replaced with the
attached amended Exhibits "A*1 and "B". These exhibits have been amended to incorporate
updated information related to the amendment provisions herein.
11. Upon the Amendment Effective Date, the Unit Operator will submit the Unit Operating
Agreement(s) with modifications required by this Amendment.
Other than the specific amendments set forth above, all other terms and conditions of the AC 859
Unit Agreement shall remain in full force and effect as originally executed.
This Agreement may be executed by signing the original or a counterpart thereof. If this
Agreement is executed in counterparts, all counterparts taken together shall have the same effect
as i f all parties had signed the same agreement, but no party shall be bound to this Agreement
unless and until all parties have executed a counterpart or the original.
IN WITNESS WrHEREOF, each party, through its duly authorized agent or representative, has
executed this Amendment effective as of the date first above written.
ACCEPTANCE OF RIGHTS AND OBLIGATIONS BY UMT OPERATOR
As Unit Operator, I hereby accept and assume all rights and obligations associated with this .Amendment to the AC 859 Unit Agreement. S
Dated: ? % I ̂
Authorized Signature:
Name: &^C1 Ham
Title: Attomey-in- Fact
Corporation: Shell Offshore Inc.
Address: Post Office Box 61933, New Orleans, Louisiana 70161
B this Qil '
Notary Public:
r, 20
My Commission Expires: BRIAM Q BIRDSALL,
NOTARY PUBLIC #912 STATE OF LOUISIANA
MY COMMISSION IS FOR LIFE
ACCEPTANCE OF RIGHTS AND OBLIGATIONS BY WORKING INTEREST OWNERS
As an owner of a Working Interest in the Unit Area, I hereby agree to the tenns and conditions set forth in this .Amendment to the AC 859J>rtTt)\greement.
Dated:
Authorized Signature:
Name: S.9»iTi-iam
Title: Attomey-in- Fact
Corporation: Shell Offshore Inc.
Address: Post Office Box 61933, New Orleans, Louisiana 70161
Subscribed and Sworn to me this da/o^NovembA-, 20 J
Notary Public: V )
x , n P BRIAN G. BIRDSALL My Commission Expires: NOTARY PUBLIC #912
STATE OF LOUISIANA MY COMMISSION IS FOR LIFE.
As an owner of a Working Interest in the Unit Area, I hereby agree to the terms and conditions set forth in this Amendment to the AC 859 Unit Agreement.
NOV 2 712017 Dated:
Authorized Signature:
Name: J. K^ith Couvillion
Title: Assistant Secretary
Corporation: Chevron U.S.A. Inc.
Address: 100 Northpark Boulevard, Covington, Louisiana 70433
Subscribed and Sworn to me this day of November, 2017
Notary Public: (L, .
My Commission Expires: ^ ^Hj ZOjfi CARIN C GALLOWAY
My Commission Expires April 4. 2019
As an owner of a Working Interest in the Unit Area, I hereby agree to the tenns and conditions set fonh in this Amendment tp the AC 859 Unit Agreement.
Dated: NOV 2 7,
Authorized Signature: ^^Y^tl
Name:
Title:
Corporation:
J. Keitfi Couvillion
Assistant Secretary
Union Oil Company of Califomia
Address: 100 Northpark Boulevard. Covington, Louisiana 70433
Subscribed and Swom to me this of November, 2017
Notary Public: C/buL^ d. J^J)Pd^i
My Commission Expires:
As an owner of a Working Interest in the Unit Area, I hereby agree to the tenns and conditions set forth in this Amendment to the AC 859 Unit Agreement.
Dated:
Authorized Signature:
Name: James C. Waithman
Title: Senior Manager, Development
Corporation: Nexen Petroleum Offshore U.S.A. Inc.
Address: 945 Bunker Hill, Suite 1400, Houston, Texas 77024
Subscribed and Swom to me this of November, 2017
Notary- Public: ^ ^ M ^ L ^
My Commission Expires: 0X111/3-0/3
Exhibit "A" AC859 Unit
Alaminos Canyon Blocks 684 (S/2), 728, 771, 772, 815, 859 •• •• i
1.5 Miles
N
A
E ^ W W e v^\e. \o \ -l0v7
I Pre-Amendment Unit Area
I I Expanded Unit Area
Potential Additional Expanded Unit Area
EXHIBIT B
OWNERSHIP OF EACH LEASE IN AC 859 UNIT- UNIT CONTRACT NO. 754307006
ALAMINOS CANYON AREA. OFFSHORE TEXAS
LEASE
BLOCK
NUMBER
EFFECTIVE
DATE OF LEASE
EXPIRATION
DATE AMOUNT OF
ACREAGE
ROYALTY
OWNERSHIP LEASE
OWNERSHIP
OCS-G 31194 684 12/1/2007 11/30/2017 2880 16 2/3% USA
Shell Offshore Inc. 60%
Chevron U.S.A. Inc. 40%
OCS-G 31195 728 12/1/2007 11/30/2017 5760 16 2/3% USA
Shell Offshore Inc. 60%
Chevron U.S.A. Inc. 40%
OCS-G 32988 771 11/1/2008 10/31/2018 5760 18 3/4% USA
Shell Offshore Inc. 60%
Chevron U.S.A. Inc. 40%
OCS-G 35153 772 1/1/2014 12/31/2023 5760 18 3/4% USA
Shell Offshore Inc. 60%
Chevron U.S.A. Inc. 40%
OCS-G 19409 815 12/1/1997 11/30/2007 5760 12 1/2% USA
Shell Offshore Inc. 40%
Chevron U.S.A. Inc. 60%
OCS-G 20871 859 12/1/1998 11/30/2008 5760 12 1/2% USA
Shell Offshore Inc. 30%
Nexen Petroleum Offshore U.S.A. Inc. 13.34%
Chevron U.S.A. Inc. 16.65%
Union Oil Company of California 40.01%