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National Assessment of Oil and Gas Fact Sheet

Assessment of Undiscovered Oil and Gas Resources in Jurassic and Cretaceous Strata of the Gulf Coast, 2010

U.S. Geological Survey estimated means of 147.4 trillion cubic feet of undiscovered natural gas, 2.4 billion barrels of undiscovered oil, and 2.96 billion barrels of undiscovered natural gas liquids in Jurassic and Cretaceous strata in onshore lands and State waters of the Gulf Coast.

Using a geology-based assessment methodology, the

Introduction

The U.S. Geological Survey (USGS) recently completed an assessment of the undiscovered oil and gas resources in Jurassic and Cretaceous strata of the onshore areas and State waters of the Gulf Coast (fig. 1). The assessment is based on

104° 38° 102° 100° 98° 96° 94° 92° 90°

geologic elements of a total petroleum system (TPS), including characterization of hydrocarbon source rocks (source-rock maturation, hydrocarbon generation and migration), reservoir rocks (sequence stratigraphy and petrophysical properties), and hydrocarbon traps (trap formation, timing, and seals). Using these criteria, the USGS defined an Upper JurassicCretaceous-Tertiary Composite TPS for conventional oil and gas resources that extends around the entire Gulf of Mexico, including portions of both the United States and Mexico. The present assessment of undiscovered conventional oil and gas resources includes only that portion of the TPS that lies onshore and in State waters of the United States (fig. 1). This area extends geographically from the southwest boundary of the Western Gulf Province (47) on the Texas-Mexico border

88° 86° Louisville 84° 82° 80° 78°

COLORADO

KANSAS

Wichita

MISSOURI

Saint Louis ILLINOIS

KENTUCKY

Nashville

VIRGINIA

36° Oklahoma City

OKLAHOMA

34°

ARKANSAS

Memphis

TENNESSEE

NORTH CAROLINA

Charlotte

Raleigh

MISSISSIPPI

Fort Worth Dallas

ALABAMA

Birmingham

SOUTH CAROLINA

Atlanta

32°

TEXAS

30°

East Texas Basin (48)

LOUISIANA

Houston

GEORGIA

UNITED STATES

Louisiana-Mississippi Salt Basins (49)

New Orleans

Austin San Antonio

ATLANTIC OCEAN

28°

MEXICO

Western Gulf (47)

Corpus Christi

Florida Peninsula (50)

Tampa

FLORIDA

Miami

26°

GULF OF MEXICO

0 50 100 100 200 MILES 200 KILOMETERS

24°

Figure 1. MapoftheGulfCoastregionshowingthepartoftheUpperJurassic-Cretaceous-TertiaryComposite TotalPetroleumSystemthatisonshoreandinStatewatersoftheGulfCoastoftheUnitedStates(bluelineindicates onshoreboundaryintheUnitedStates).ProvinceboundariesdefinedbytheU.S.GeologicalSurveyareindicatedby redoutlines.

U.S. Department of the Interior U.S. Geological Survey

Printed on recycled paper

Fact Sheet 2011­3020 March 2011

Table 1. GulfCoastassessmentresults.

[MMBO,millionbarrelsofoil;BCFG,billioncubicfeetofgas;MMBNGL,millionbarrelsofnaturalgasliquids.Resultsshownarefullyriskedestimates.Forgasaccumulations,allliquidsareincludedasNGL(naturalgasliquids).F95representsa95percentchanceofatleasttheamounttabulated;otherfractilesaredefinedsimilarly. Fractilesareadditiveundertheassumptionofperfectpositivecorrelation.TPS,totalpetroleumsystem;AU,assessmentunit.Grayshadingindicatesnotapplicable] Total Petroleum Systems (TPS) and Assessment Units (AU) Total Undiscovered Resources Oil (MMBO) F95 13 0 0 27 F50 48 0 0 76 F5 106 0 0 136 Mean 53 0 0 78 F95 8 371 0 208 0 0 29 46 21 6 0 75 22 0 149 51 0 79 25 0 25 265 7 203 0 143 7 27 64 30 9 9 0 0 0 0 0 590 0 0 0 0 0 211 0 11 0 45 0 106 0 50 0 621 31 167 Not quantitatively assessed 3 23 9 71 19 153 10 78 1 140 78 252 11 0 10 35 1 37 69 3 83 37 1 40 9 39 0 0 26 120 41 136 253 141 53 86 4 440 260 720 31 116 0 3 100 466 184 289 9 803 602 1,480 67 207 3 15 246 1,041 381 571 4 453 290 778 33 119 1 4 113 509 197 305 0 1 4 7 0 1 0 0 1 2 1 3 0 4 13 22 1 3 0 0 5 8 4 11 0 9 32 50 3 6 0 0 12 20 8 24 0 5 15 25 1 3 0 0 5 9 4 12 Gas (BCFG) F50 31 1,579 0 1,175 0 153 85 151 90 889 25 699 0 541 37 27 0 2,512 0 945 0 3,069 132 587 F5 73 3,709 0 4,029 0 748 169 304 199 1,693 62 1,419 0 1,180 95 75 0 5,806 0 2,368 0 7,382 336 1,279 Mean 34 1,758 0 1,514 0 233 90 160 98 926 28 744 0 587 43 32 0 2,765 0 1,072 0 3,423 151 640 F95 1 12 0 0 0 0 2 4 2 32 1 19 0 2 1 0 0 8 0 3 0 6 1 5 NGL (MMBNGL) F50 2 53 0 2 0 5 7 15 7 112 2 68 0 8 3 1 0 34 0 13 0 30 6 17 F5 6 135 0 7 0 27 15 32 17 235 5 151 0 19 9 3 0 86 0 35 0 78 16 41 Mean 3 61 0 3 0 8 7 16 8 120 2 74 0 9 4 1 0 39 0 15 0 34 7 19

Field Type

UpperJurassic-Creataceous-TertiaryCompositeTPS(50490100) Norphlet Salt Basins and Updip AU (50490102) Norphlet Mobile Bay Deep Gas AU (50490103) Norphlet South Texas Gas AU (50490104) Oil Gas Oil Gas Oil Gas

Oil Smackover Updip and Peripheral Fault Zone AU (50490105) Gas Smackover Salt Basin AU (50490106) Smackover South Texas AU (50490107) Haynesville Western ShelfSabine Platform Carbonate Gas AU (50490116) Conventional Oil and Gas Resources Haynesville Shelf Carbonate and Sandstone Oil and Gas AU (50490117) Bossier East Texas Basin Sandstone Gas AU (50490118) Bossier Louisiana-Mississippi Shelf Edge Sandstone Gas AU (50490119) Knowles-Calvin Gas AU (50490120) Oil Gas Oil Gas Oil Gas Oil Gas Oil Gas Oil Gas Oil Gas

Oil Sligo-James Carbonate Platform Gas and Oil AU (50490121) Gas Lower Cretaceous Basinal Gas AU (50490122) Sligo Sandstone Gas and Oil AU (50490123) Greater Glen Rose Carbonate Shelf and Reef Gas and Oil AU (50490124) Albian Clastic AU (50490125) Updip Albian Clastic AU (50490126) Gas Oil Gas Oil Gas Oil Gas Oil Gas

Fredericksburg-Buda Carbonate Oil Platform-Reef Gas and Oil Gas AU (50490127) Eagle Ford Updip Sandstone Oil Oil and Gas AU (50490128) Gas

Table 1. GulfCoastassessmentresults.--Continued

[MMBO,millionbarrelsofoil;BCFG,billioncubicfeetofgas;MMBNGL,millionbarrelsofnaturalgasliquids.Resultsshownarefullyriskedestimates.Forgasaccumulations,allliquidsareincludedasNGL(naturalgasliquids).F95representsa95percentchanceofatleasttheamounttabulated;otherfractilesaredefinedsimilarly. Fractilesareadditiveundertheassumptionofperfectpositivecorrelation.TPS,totalpetroleumsystem;AU,assessmentunit.Grayshadingindicatesnotapplicable] Total Petroleum Systems (TPS) and Assessment Units (AU) Total Undiscovered Resources Oil (MMBO) F95 6 10 3 F50 19 41 11 F5 34 95 32 Mean 20 45 13 F95 1 17 28 109 10 406 Not quantitatively assessed Not quantitatively assessed 192 Gas Gas Gas Gas Gas Gas Oil Gas Oil 507 839 1,389 879 Not quantitatively assessed 341 758 1,687 853 625 23,470 674 1,486 46,150 1,233 3,533 90,747 2,255 1,707 50,219 1,319 12 851 49 29 1,809 97 74 3,842 193 34 2,009 106 Not quantitatively assessed 3,386 7,764 17,801 8,817 0 0 0 0 Not quantitatively assessed 2,879 4,870 8,240 5,126 5 10 18 10 653 1,353 700 4,318 44,268 17,457 59,735 41,084 80,604 19,429 60,734 178 22 684 35 1,633 55 766 36 Gas (BCFG) F50 3 47 118 477 43 1,429 F5 6 92 300 1,192 130 3,013 Mean 3 50 135 542 53 1,542 F95 0 0 2 10 1 46 NGL (MMBNGL) F50 0 1 10 46 4 167 F5 0 2 27 124 14 385 Mean 0 1 12 54 5 185

Field Type

UpperJurassic-Creataceous-TertiaryCompositeTPS(50490100),continued Conventional Oil and Gas Resources Austin-Tokio-Eutaw Updip Oil and Gas AU (50490130) Austin-Eutaw Middip Oil and Gas AU (50490131) Austin Downdip Gas AU (50490132) Post-Ouachita Successor Basin AU (50490201) Triassic Basins AU (50490202) Total Conventional Resources Haynesville Sabine Platform Shale Gas AU (50490161) Haynesville Greater Gulf Basin Shale Gas AU (50490162) Mid-Bossier Sabine Platform Shale Gas AU (50490163) Continuous Oil and Gas Resources Bossier Greater Gulf Basin Shale Gas AU (50490164) Maverick Basin Pearsall Shale Gas AU (50490165) Greater Gulf Basin Lower Cretaceous Shale Gas AU (50490166) Eagle Ford Shale Oil AU (50490170) Eagle Ford Shale Gas AU (50490167) Austin Pearsall-Giddings Area Oil AU (50490168) Oil Gas Oil Gas Oil Gas Gas Gas

Smackover Downdip Gas Continuous Gas AU (50490169) Total Continuous Resources Total Undiscovered Oil and Gas Resources

Not quantitatively assessed 848 1,597 3,076 1,732 75,302 121,238 203,180 127,922 939 1,980 4,182 2,195

1,040

2,250

4,429

2,432

79,620

138,695

244,264

147,351

1,117

2,664

5,815

2,961

CRETACEOUS

eastward into Texas and Louisiana, including the East Texas Basin Province (48), and continues to State waters and onshore lands primarily in Louisiana, Mississippi, Arkansas, and Alabama in the Louisiana-Mississippi Salt Basins Province (49). The TPS also includes Florida and small parts of Oklahoma, Missouri, Illinois, Kentucky, Tennessee, and Georgia (fig. 1). The Florida Peninsula Province (50) was not assessed as part of this study. The Upper Jurassic-Cretaceous-Tertiary Composite TPS contains 34 defined assessment units (AUs) for undiscovered conventional and continuous oil and (or) gas resources (table 1) within Jurassic and Cretaceous strata (fig. 2) that lie predominantly on the coastal plain and in State waters of Texas, Louisiana, Mississippi, Alabama, and a small part of the Florida panhandle.

PERIOD

EPOCH

AGE

Maastrichtian

Ma 65.5 70.6

GROUP OR FORMATION

Navarro Gp. (Escondido Fm.-Olmos Fm.) Taylor Gp. (San Miguel Fm. / Anacacho Ls. / Ozan Fm. /Annona Chalk) Austin Gp. /Tokio Fm. / Eutaw Fm.

Campanian

LATE

83.5 Santonian Coniacian Turonian Cenomanian 88.6

Eagle Ford Fm. Woodbine Fm. /Tuscaloosa Gp. Washita Gp. (Buda Ls.) Fredricksburg Gp. (Edwards Ls. /Paluxy Fm.) Glen Rose Fm. (Rodessa Fm.) Pearsall Fm. Sligo Fm.

99.6

Resource Summary

The USGS assessment of undiscovered conventional oil and gas resulted in estimated means of 19,429 billion cubic feet of gas (BCFG), 700 million barrels of oil (MMBO), and 766 million barrels of natural gas liquids (MMBNGL) in the AUs that were assessed (table 1). For undiscovered continuous oil and gas resources, the estimated means are 127,922 billion cubic feet of gas (BCFG), 1,732 million barrels of oil (MMBO), and 2,195 million barrels of natural gas liquids (MMBNGL) in the AUs that were assessed (table 1).

Albian 112

EARLY

Aptian Barremian Hauterivian Valanginian Berriasian Tithonian 125 134 145.5 151 156 161 197 200 Hosston Fm. (Travis Peak Fm.)

(Pettet Fm.)

Cotton Valley Fm. Bossier Fm. Haynesville Fm. / Gilmer Ls. Smackover Fm. Norphlet Fm. Louann Salt Werner Fm.

LATE

For Additional Information

Supporting geologic studies of Gulf Coast region total petroleum systems and assessment units are in progress, as well as studies of the methodology used in the assessment of both conventional and unconventional resources in Jurassic and Cretaceous strata of the Gulf Coast. Assessment results are available at the USGS Central Energy Resources Science Center Web site: http://energy.cr.usgs.gov/oilgas/noga.

JURASSIC

Kimmeridgian Oxfordian Callovian Bathonian Hettangian Rhaetian Norian Carnian

E.

MID.

TRI. (part)

Gulf Coast Assessment Team

Russell F. Dubiel ([email protected]), Peter D. Warwick ([email protected]), Sharon Swanson ([email protected]), Lauri Burke, Laura R.H. Biewick, Ronald R. Charpentier, James L. Coleman, Troy A. Cook, Kris Dennen, Colin Doolan, Catherine Enomoto, Paul C. Hackley, Alexander W. Karlsen, Timothy R. Klett, Scott A. Kinney, Michael D. Lewan, Matt Merrill, Krystal Pearson, Ofori N. Pearson, Janet K. Pitman, Richard M. Pollastro, Elizabeth L. Rowan, Christopher J. Schenk, and Brett Valentine.

Figure 2. Generalizedstratigraphicsectionshowing geologicunitsforwhichpetroleumresourceswere assessedintheGulfCoastregion.Nomenclatureisa combinationofformalandinformalgroupsandformation andmembernamesthatarebasedonphysicalor biostratigraphiccorrelationsinoutcropandsubsurface studies.Thenomenclaturereflectsthecommon designationandusageintheregionbyState,industry, U.S.GeologicalSurvey,andacademicgeologists.(TRI., Triassic;E.,Early;MID.,Middle;Ma,millionyearsago; Fm.,Formation;Gp.,Group;Ls.,Limestone).

LATE

Eagle Mills Fm.

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