-6000 -6300

-5900



# -5800

-5700

-5800 

# -5800 -5900



# -5900 

# -5900

-5800

-5700 

# -5700

-5800



# -5800 -5900 -5800 -5800

-5800 -5800

-5800 

# -6500 

# -6800

-7000

-6300



# -5900CWR6G31931Shell Offshore Inc.WR7G31932Shell Offshore Inc.WR8G33958Shell Offshore Inc.WR50G31937Shell Offshore Inc.WR94G31942Marathon Oil CompanyRepsol E&P USA Inc.WR95G31943Shell Offshore Inc.WR96G25234Shell Offshore Inc.WR51G31938ConocoPhillips CompanyWR52G25232ConocoPhillips CompanyCD 13,000 ft Radius 1,000 ft Buffer

5,000 ft RadiusAnchor Chart DPrepared for:Anadarko Petroleum CorporationGeodetic InformationLocation MapINTERPRETATION: B. Monsalve, Z. ZhangGIS/CAD: B. DillardDATE: 3/4/2011REPORT NO: 4026-ANA-GOMFILE: 4064_Anchor_Chart_WR51_D_12.dwgSPHEROID:Clarke 1866INVERSE FLATTENING:1/294.978698SEMIMAJOR AXIS:6,378,206.40 ftSCALE FACTOR:0.9996PROJECTION:Transverse MercatorCENTRAL MERIDIAN::DATUM:NAD27LATITUDE OF ORIGIN:ZONE:UTM Zone 15 NorthFALSE EASTING:1,640,416.666667 ftLINEAR UNITS:Survey FeetFALSE NORTHING:0 ft 

# :
 :


1


1
1: : : : : : : : : : : :: : : : : : : : : : : :111111111111111Amery TerraceEast BreaksGarden BanksGreen CanyonAtwater ValleyDestin DomeMississippi CanyonDe Soto CanyonLloyd RidgeHendersonFlorida PlainLundLund SouthWalker RidgeKeathley CanyonAlaminos CanyonSigsbee EscarpmentTexasLouisianaMississippiAlabamaFloridaBrownsvilleCorpus ChristiPort LavacaFreeportGalvestonHoustonThe WoodlandsPort ArthurLake CharlesLafayetteMorgan CityNew OrleansBiloxiPascagulaMobilePensacolaHouma0 25 50 100Nautical MilesWestCameronWestCameronWestWestCameronSouthWestDeltaGrandIsleEugeneIsland 

# TR 3130

TR 3160

TR 3190

TR 3220

TR 3250

TR 3280

TR 3310

TR 3340

TR 3370

TR 3400

TR 3430

TR 3460

TR 3490

TR 3520 TR 3100 TR 3070 TR 3040 TR 3010 TR 2980LN 31000LN 31100LN 31200LN 31300LN 31400LN 31500LN 31600LN 31700LN 31800LN 31900LN 32000LN 32100LN 32200



# E 2,100,000

E 2,105,000

E 2,110,000

E 2,115,000 E 2,100,000

E 2,105,000

E 2,110,000

E 2,115,000N 9,760,000N 9,765,000N 9,770,000N 9,760,000N 9,765,000N 9,770,000 

# :


:


:


:
 :


:


:


:


1
 1
 1
 

# 1
 1
 1
LN 32300LN 32400



# TR 2950 TR 2920 TR 2890 TR 2860

TR 3130

TR 3160

TR 3190

TR 3220

TR 3250

TR 3280

TR 3310

TR 3340

TR 3370

TR 3400

TR 3430

TR 3460

TR 3490

TR 3520 TR 3100 TR 3070 TR 3040 TR 3010 TR 2980 TR 2950 TR 2920 TR 2890 TR 2860LN 31000LN 31100LN 31200LN 31300LN 31400LN 31500LN 31600LN 31700LN 31800LN 31900LN 32000LN 32100LN 32200LN 32300LN 32400N 9,775,000N 9,775,000



# E 2,095,000 E 2,095,000

:


:
1:12,000FeetWater Depth & Seafloor FeaturesShowing Potential Anchor TouchdownArea for Proposed WR51 Well D0 500 1000 2000 3000 4000 5000LN 32500LN 32600LN 32700LN 32500LN 32600LN 32700N 9,780,000N 9,780,000Southern WR7, Southern WR8,North-Central WR51, North-Central WR52Walker Ridge (WR)Gulf of MexicoInterpretive InformationBasemap InformationWR51DProposed Well Surface Location and DesignationLN 31555TR 33003D Seismic Survey Line, Trace, and Designation(LN=Line) (TR=Trace)Lease Block Boundary: Block Number, Lease Numberwith Operator and Primary Lease Holder shownWR511RWHV/LQHVKDYHDQD]LPXWKRI7UDFHVKDYHDQD]LPXWKRI'DWD6SDFLQJfor 3D seismic survey: Line 65.62 ft, Trace 41.01 ft. Line numbering increment is 5,Trace numbering increment is 1. Locations of every 20th Line and every 30th Traceare shown2. Infrastructure information primarily from BOEMRE database, these data, andAOA database updated as of February 2011.Lowest Contour of Local DepressionFault with seafloor expression. Symbol showsdownthrown side and direction of fault dip -6000Water Depth Contours, 20 ft interval:Intermediate ContourWater Depth Contours:Index ContourFracture zone with valleys, ridges, andsteep slopesFaulted zones with grabensInterpreted fluid expusion structure, possiblehydrocarbon seep and deepwater benthiccommunitiesApproximate Maximum Anchor Radius - 13,000 ftApproximate Touchdown Point - 5,000 ft1,000 ft buffer beyond approximate maximum anchor radiusA 2,000 ft radius circle around well surface location isshown as required by Notice to Lessees 2009-G40Existing Well Location and Designation001LN 30900LN 30800LN 30700LN 30900LN 30800LN 30700 

# TR 2830 TR 2800 TR 2770

TR 2830 TR 2800 TR 2770



# E 2,090,000 E 2,090,000N 9,755,000N 9,755,000Grid North2500 Tanglewilde, Suite 120Houston, TX 77063(713) 532-2624

# D

HYDROGEN SULFIDE INFORMATION

Discussions regarding geologic information ar e considered proprietary and have been

omitted from this pub lic copy of the EP.

Anadarko requests that th e Walker Ridge Block 51 area be classified as a “zone where the absence

of H 2 

# S has been confirmed” pursuant to 30 CFR 250.67(c), and as de noted under the approved Plan

Control No: S-7513.