Chapter 3

Tabular Data and Graphical Images in 

Support of the U.S. Geological Survey 

National Oil and Gas Assessment—

Western Oregon and Washington 

Province (5004)

By T.R. Klett and P.A. Le

Chapter 3 of 4

Geologic Assessment of Undiscovered Hydrocarbon Resources 

of the Western Oregon and Washington Province 

By U.S. Geological Survey Western Oregon and Washington Province Assessment Team

U.S. Geological Survey Digital Data Series DDS–69–X

U.S. Department of the Interior

U.S. Geological Survey

Click here to return to

Volume Title Page
U.S. Department of the Interior

KEN SALAZAR, Secretary

U.S. Geological Survey

Marcia K. McNutt, Director

U.S. Geological Survey, Reston, Virginia: 2011

For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, 

natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS

For an overview of USGS information products, including maps, imagery, and publications, 

visit http://www.usgs.gov/pubprod

To order this and other USGS information products, visit http://store.usgs.gov

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the 

U.S. Government.

Although this report is in the public domain, permission must be secured from the individual copyright owners to 

reproduce any copyrighted materials contained within this report.

Suggested citation:

Klett, T.R., and Le, P.A., 2011, Tabular data and graphical images in support of the U.S. Geological Survey National oil 

and gas assessment—Western Oregon and Washington Province (5004): U.S. Geological Survey Digital Data Series 

DDS–69–X, chap. 3, 21 p.
iii

Contents

Introduction.....................................................................................................................................................1

Disclaimers .....................................................................................................................................................1

Data Sources..................................................................................................................................................1

Data Overview................................................................................................................................................1

Data Tables ............................................................................................................................................2

Summary Tables....................................................................................................................................2

Graphs.....................................................................................................................................................2

Numeric Codes...............................................................................................................................................2

Summary Tables.............................................................................................................................................3

Graphical Data................................................................................................................................................3

File List.............................................................................................................................................................3

Tabular Data....................................................................................................................................................3

References Cited..........................................................................................................................................21
Introduction

This chapter describes data used in support of the process being applied by the U.S. Geological Survey (USGS) National 

Oil and Gas Assessment (NOGA) project. Digital tabular data used in this report and archival data that permit the user to 

perform further analyses are available elsewhere on this CD–ROM. Computers and software may import the data without 

transcription from the Portable Document Format files (.pdf files) of the text by the reader. Because of the number and variety 

of platforms and software available, graphical images are provided as .pdf files and tabular data are provided in a raw form as 

tab-delimited text files (.tab files).

Disclaimers

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. 

Government.

Although all data and software published on this CD–ROM have been used by the USGS, no warranty, expressed or 

implied, is made by the USGS as to the accuracy of the data and related materials. The act of distribution shall not constitute any 

such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.

Data Sources

Crude oil and natural gas production data (including all volumetric and descriptive data such as cumulative production, 

remaining reserves, known recoverable volumes, major producing reservoirs, and petroleum type) and historical data (including 

field-discovery dates, well-completion dates, exploration objectives, and well depths) for fields, reservoirs, and wells are derived 

from commercial databases leased and (or) purchased by the USGS, including (1) PI/Dwights Plus US Production Data (IHS 

Energy Group, 2008a) and (2) PI/Dwights Plus US Well Data (IHS Energy Group, 2008b) as well as older versions of these 

databases. Data from these databases are subject to proprietary constraints, but derivative representations in the form of graphs 

and summary statistics are allowed to be published and were prepared for each assessment unit. To supplement commercial 

databases, additional data are obtained, where available, from operators, other Federal and State agencies, or published geological reports.

The PI/Dwights Plus US Production database provides production data for wells, leases, or production units. The PI/

Dwights Plus US Well database provides individual well data (including data for dry holes), including well identifications, locations, initial and final well status classifications, completion dates, and information on penetrated formations.

Data Overview

This report provides various data files supporting the NOGA project. The files contain data that are the source for the 

various graphs, data tables, and summary tables used in the assessment process. Tabular data are provided as tab-delimited text 

Tabular Data and Graphical Images in Support of the U.S. 

Geological Survey National Oil and Gas Assessment—

Western Oregon and Washington Province (5004)

By T.R. Klett and P.A. Le
2 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

files (.tab files), usable in spreadsheet and database software. Graphical and summary data are provided as Portable Document 

Format files (.pdf files). File name conventions are as follows:

Data Tables

eco####.tab

fed####.tab

own####.tab

sta####.tab

vol####.tab

inf####.tab

ins####.tab

Summary Tables

c######.pdf

u######.pdf

Graphs

em######.pdf

fp######.pdf

For identification purposes, numbers in the positions occupied by the four symbols “####” represent the province code. 

Files with these numbers contain data for the entire province. Files having numbers in the positions occupied by the six symbols 

“######” (which represent the last six digits of the assessment-unit code) contain data only for that assessment unit.

Numeric Codes

A hierarchical numeric code identifies each region, province, total petroleum system, and assessment unit. The criteria for 

assigning codes are uniform throughout the NOGA project and throughout all resulting publications. The numeric codes used in 

this study are listed below.

Unit Name Code

Region North America 5

Province Western Oregon-Washington 5004

Total Petroleum System Cretaceous-Tertiary Composite 500401

Tertiary Marine 500402

Tertiary Coalbed Gas 500403

Assessment Units Western Oregon and Washington Conventional Gas 50040101

Tertiary Marine Gas 50040201

Eocene Coalbed Gas 50040381

The assessment-unit portion of the code (last two digits) defines the type of assessment unit. Numbers from 01 to 59 

represent conventional assessment units: 61 to 79 represent continuous oil or gas assessment units, and 81 to 99 represent 

coalbed-gas assessment units. No total petroleum system or assessment-unit codes end with 0, for example 500400, 50040160 or 

50040180.

To maintain the conventional labeling of files (8-character name and 3-character extension), some file names that contain assessment-unit numbers do not include the first two digits. For example, a summary table that contains input data for the 

Western Oregon and Washington Conventional Gas Assessment Unit is labeled “c040101.pdf.”
Tabular Data 3

Summary Tables

The c######.pdf and u######.pdf files are copies of the completed input data forms used in the assessment process. The 

c######.pdf files contain the Seventh Approximation Data Forms for Conventional Assessment Units. The u######.pdf files 

contain the FORSPAN Assessment Model for Continuous Accumulations–Basic Input Data Form. These data are defined in the 

inf####.tab and ins####.tab sections of this report.

Graphical Data

The fp######.pdf files contain graphs of input data and estimated petroleum resource volumes for continuous assessment 

units. The data are defined in the inf####.tab and vol####.tab sections of this report. The graphs contained in these files are 

derived from a report generated by a commercial software package. The quality of these preformatted graphs, therefore, does not 

necessarily meet USGS editorial standards.

The em######.pdf files contain graphs of input data and estimated petroleum resource volumes for conventional assessment units. The data are defined in the ins####.tab and vol####.tab sections of this report. The graphs contained in these files are 

derived from a report generated by a commercial software package. The quality of these preformatted graphs, therefore, does not 

necessarily meet USGS editorial standards.

File List

Data tables File contents

eco5004.tab Area- and volume-percent data by ecosystem regions

fed5004.tab Area- and volume-percent data by Federal land ownership

inf5004.tab Input data for assessment model, continuous accumulations

ins5004.tab Input data for assessment model, conventional accumulations

own5004.tab Area- and volume-percent data by land ownership

sta5004.tab Area- and volume-percent data by State

vol5004.tab Undiscovered petroleum volume data

Summary tables Assessment-unit name

c040101.pdf Western Oregon and Washington Conventional Gas

c040201.pdf Tertiary Marine Gas

u040381.pdf Eocene Coalbed Gas

Graphs Assessment-unit name

em040101.pdf Western Oregon and Washington Conventional Gas

em040201.pdf Tertiary Marine Gas

fp040381.pdf Eocene Coalbed Gas

Tabular Data

The eco####.tab, fed####.tab, own####.tab, and sta####.tab files contain volume-percent data of undiscovered petroleum allocated to ecosystem regions, Federal lands, general land-ownership parcels, and States. Cells are left blank if data are 

unavailable.

The eco####.tab table contains 59 columns. The sum of the percentages should equal those for the total area (excluding 

offshore) in the own####.tab file. Data columns for these files are as follows:

1. Code—assessment-unit code number.

2. Name—assessment-unit name.

3. Area km2—area of the assessment unit in square kilometers.
4 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

4. Eco 1—name of first ecosystem that occupies all or part of the assessment-unit area.

5. E1 Area %—percentage of assessment-unit area that is occupied by ecosystem 1.

6. E1 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 1.

7. E1 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 1.

8. Eco 2—name of second ecosystem that occupies part of the assessment-unit area.

9. E2 Area %—percentage of assessment-unit area that is occupied by ecosystem 2.

10. E2 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 2.

11. E2 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 2.

12. Eco 3—name of third ecosystem that occupies part of the assessment-unit area.

13. E3 Area %—percentage of assessment-unit area that is occupied by ecosystem 3.

14. E3 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 3.

15. E3 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 3.

16. Eco 4—name of fourth ecosystem that occupies part of the assessment-unit area.

17. E4 Area %—percentage of assessment-unit area that is occupied by ecosystem 4.

18. E4 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 4.

19. E4 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 4.

20. Eco 5—name of fifth ecosystem that occupies part of the assessment-unit area.

21. E5 Area %—percentage of assessment-unit area that is occupied by ecosystem 5.

22. E5 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 5.

23. E5 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 5.

24. Eco 6—name of sixth ecosystem that occupies part of the assessment-unit area.

25. E6 Area %—percentage of assessment-unit area that is occupied by ecosystem 6.

26. E6 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 6.

27. E6 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 6.

28. Eco 7—name of seventh ecosystem that occupies part of the assessment-unit area.

29. E7 Area %— percentage of assessment-unit area that is occupied by ecosystem 7.

30. E7 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 7.

31. E7 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 7.

32. Eco 8—name of eighth ecosystem that occupies part of the assessment-unit area.

33. E8 Area %—percentage of assessment-unit area that is occupied by ecosystem 8.

34. E8 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 8.

35. E8 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 8.

36. Eco 9—name of ninth ecosystem that occupies part of the assessment-unit area.

37. E9 Area %—percentage of assessment-unit area that is occupied by ecosystem 9.
Tabular Data 5

38. E9 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 9.

39. E9 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 9.

40. Eco 10—name of tenth ecosystem that occupies part of the assessment-unit area.

41. E10 Area %—percentage of assessment-unit area that is occupied by ecosystem 10.

42. E10 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 10.

43. E10 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 10.

44. Eco 11—name of eleventh ecosystem that occupies part of the assessment-unit area.

45. E11 Area %—percentage of assessment-unit area that is occupied by ecosystem 11.

46. E11 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 11.

47. E11 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 11.

48. Eco 12—name of twelfth ecosystem that occupies part of the assessment-unit area.

49. E12 Area %—percentage of assessment-unit area that is occupied by ecosystem 12.

50. E12 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 12.

51. E12 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 12.

52. Eco 13—name of thirteenth ecosystem that occupies part of the assessment-unit area.

53. E13 Area %—percentage of assessment-unit area that is occupied by ecosystem 13.

54. E13 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 13.

55. E13 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 13.

56. Eco 14—name of fourteenth ecosystem that occupies part of the assessment-unit area.

57. E14 Area %—percentage of assessment-unit area that is occupied by ecosystem 14.

58. E14 Oil %—estimated percentage of undiscovered oil volume allocated to ecosystem 14.

59. E14 Gas %—estimated percentage of undiscovered gas volume allocated to ecosystem 14.

The fed####.tab table contains 83 columns. The sum of the percentages should equal those for Federal lands in the 

own####.tab file. Data columns for these files are:

1. Code—assessment-unit code number.

2. Name—assessment-unit name.

3. Area km2—area of the assessment unit in square kilometers.

4. BLM—“Bureau of Land Management (BLM),” name of Federal land that occupies all or part of the assessment-unit area.

5. BLM Area %—percentage of assessment-unit area that is occupied by Bureau of Land Management lands.

6. BLM Oil %—estimated percentage of undiscovered oil volume allocated to Bureau of Land Management lands.

7. BLM Gas %—estimated percentage of undiscovered gas volume allocated to Bureau of Land Management lands.

8. BLMW—“BLM Wilderness Areas (BLMW),” name of Federal land that occupies all or part of the assessment-unit area.

9. BLMW Area %—percentage of assessment-unit area that is occupied by Bureau of Land Management Wilderness Areas.

10. BLMW Oil %—estimated percentage of undiscovered oil volume allocated to Bureau of Land Management Wilderness 

Areas.
6 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

11. BLMW Gas %—estimated percentage of undiscovered gas volume allocated to Bureau of Land Management Wilderness 

Areas.

12. BLMR—“BLM Roadless Areas (BLMR),” name of Federal land that occupies all or part of the assessment-unit area.

13. BLMR Area %—percentage of assessment-unit area that is occupied by Bureau of Land Management Roadless Areas.

14. BLMR Oil %—estimated percentage of undiscovered oil volume allocated to Bureau of Land Management Roadless Areas.

15. BLMR Gas %—estimated percentage of undiscovered gas volume allocated to Bureau of Land Management Roadless 

Areas.

16. NPS—“National Park Service (NPS),” name of Federal land that occupies all or part of the assessment-unit area.

17. NPS Area %—percentage of assessment-unit area that is occupied by National Park Service lands.

18. NPS Oil %—estimated percentage of undiscovered oil volume allocated to National Park Service lands.

19. NPS Gas %—estimated percentage of undiscovered gas volume allocated to National Park Service lands.

20. NPSW—“NPS Wilderness Areas (NPSW),” name of Federal land that occupies all or part of the assessment-unit area.

21. NPSW Area %—percentage of assessment-unit area that is occupied by National Park Service Wilderness Areas.

22. NPSW Oil %—estimated percentage of undiscovered oil volume allocated to National Park Service Wilderness Areas.

23. NPSW Gas %—estimated percentage of undiscovered gas volume allocated to National Park Service Wilderness Areas.

24. NPSP—“NPS Withdrawals (NPSP),” name of Federal land that occupies all or part of the assessment-unit area.

25. NPSP Area %—percentage of assessment-unit area that is occupied by National Park Service Withdrawals.

26. NPSP Oil %—estimated percentage of undiscovered oil volume allocated to National Park Service Withdrawals.

27. NPSP Gas %—estimated percentage of undiscovered gas volume allocated to National Park Service Withdrawals.

28. FS—“Forest Service (FS),” name of Federal land that occupies all or part of the assessment-unit area.

29. FS Area %—percentage of assessment-unit area that is occupied by USDA Forest Service lands.

30. FS Oil %—estimated percentage of undiscovered oil volume allocated to USDA Forest Service lands.

31. FS Gas %—estimated percentage of undiscovered gas volume allocated to USDA Forest Service lands.

32. FSW—“FS Wilderness Areas (FSW),” name of Federal land that occupies all or part of the assessment-unit area.

33. FSW Area %—percentage of assessment-unit area that is occupied by USDA Forest Service Wilderness Areas.

34. FSW Oil %—estimated percentage of undiscovered oil volume allocated to USDA Forest Service Wilderness Areas.

35. FSW Gas %—estimated percentage of undiscovered gas volume allocated to USDA Forest Service Wilderness Areas.

36. FSR—“FS Roadless Areas (FSR),” name of Federal land that occupies all or part of the assessment-unit area.

37. FSR Area %—percentage of assessment-unit area that is occupied by USDA Forest Service Roadless Areas.

38. FSR Oil %—estimated percentage of undiscovered oil volume allocated to USDA Forest Service Roadless Areas.

39. FSR Gas %—estimated percentage of undiscovered gas volume allocated to USDA Forest Service Roadless Areas.

40. FSP—“FS Protected Withdrawals (FSP),” name of Federal land that occupies all or part of the assessment-unit area.

41. FSP Area %—percentage of assessment-unit area that is occupied by USDA Forest Service Protected Withdrawals.

42. FSP Oil %—estimated percentage of undiscovered oil volume allocated to USDA Forest Service Protected Withdrawals.

43. FSP Gas %—estimated percentage of undiscovered gas volume allocated to USDA Forest Service Protected Withdrawals.
Tabular Data 7

44. FWS—“U.S. Fish and Wildlife Service (USFWS),” name of Federal land that occupies all or part of the assessment-unit 

area.

45. FWS Area %—percentage of assessment-unit area that is occupied by U.S. Fish and Wildlife Service lands.

46. FWS Oil %—estimated percentage of undiscovered oil volume allocated to U.S. Fish and Wildlife Service lands.

47. FWS Gas %—estimated percentage of undiscovered gas volume allocated to U.S. Fish and Wildlife Service lands.

48. FWSW—“USFWS Wilderness Areas (USFWSW),” name of Federal land that occupies all or part of the assessment-unit 

area.

49. FWSW Area %—percentage of assessment-unit area that is occupied by U.S. Fish and Wildlife Service Wilderness Areas.

50. FWSW Oil %—estimated percentage of undiscovered oil volume allocated to U.S. Fish and Wildlife Service Wilderness 

Areas.

51. FWSW Gas %—estimated percentage of undiscovered gas volume allocated to U.S. Fish and Wildlife Service Wilderness 

Areas.

52. FWSP—“USFWS Protected Withdrawals (USFWSP),” name of Federal land that occupies all or part of the assessment-unit 

area.

53. FWSP Area %—percentage of assessment-unit area that is occupied by U.S. Fish and Wildlife Service Protected Withdrawals.

54. FWSP Oil %—estimated percentage of undiscovered oil volume allocated to U.S. Fish and Wildlife Service Protected Withdrawals.

55. FWSP Gas %—estimated percentage of undiscovered gas volume allocated to U.S. Fish and Wildlife Service Protected 

Withdrawals.

56. WS—“Wilderness Study Areas (WS),” name of Federal land that occupies all or part of the assessment-unit area.

57. WS Area %—percentage of assessment-unit area that is occupied by Wilderness Study Areas.

58. WS Oil %—estimated percentage of undiscovered oil volume allocated to Wilderness Study Areas.

59. WS Gas %—estimated percentage of undiscovered gas volume allocated to Wilderness Study Areas.

60. DOE—“Department of Energy (DOE),” name of Federal land that occupies all or part of the assessment-unit area.

61. DOE Area %—percentage of assessment-unit area that is occupied by Department of Energy lands.

62. DOE Oil %—estimated percentage of undiscovered oil volume allocated to Department of Energy lands.

63. DOE Gas %—estimated percentage of undiscovered gas volume allocated to Department of Energy lands.

64. DOD—“Department of Defense (DOD),” name of Federal land that occupies all or part of the assessment-unit area.

65. DOD Area %—percentage of assessment-unit area that is occupied by Department of Defense lands.

66. DOD Oil %—estimated percentage of undiscovered oil volume allocated to Department of Defense lands.

67. DOD Gas %—estimated percentage of undiscovered gas volume allocated to Department of Defense lands.

68. BOR—“Bureau of Reclamation (BOR),” name of Federal land that occupies all or part of the assessment-unit area.

69. BOR Area %—percentage of assessment-unit area that is occupied by Bureau of Reclamation lands.

70. BOR Oil %—estimated percentage of undiscovered oil volume allocated to Bureau of Reclamation lands.

71. BOR Gas %—estimated percentage of undiscovered gas volume allocated to Bureau of Reclamation lands.

72. TVA—“Tennessee Valley Authority (TVA),” name of Federal land that occupies all or part of the assessment-unit area.
8 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

73. TVA Area %—percentage of assessment-unit area that is occupied by Tennessee Valley Authority lands.

74. TVA Oil %—estimated percentage of undiscovered oil volume allocated to Tennessee Valley Authority lands.

75. TVA Gas %—estimated percentage of undiscovered gas volume allocated to Tennessee Valley Authority lands.

76. Other—“Other Federal,” other unspecified Federal lands that occupy all part of the assessment-unit area.

77. Oth Area %—percentage of assessment-unit area that is occupied by other unspecified Federal lands.

78. Oth Oil %—estimated percentage of undiscovered oil volume allocated to other unspecified Federal lands.

79. Oth Gas %—estimated percentage of undiscovered gas volume allocated to other unspecified Federal lands.

80. Fed 20—name of additional specified Federal lands that occupy all or part of the assessment-unit area.

81. F20 Area %—percentage of assessment-unit area that is occupied by additional specified Federal lands.

82. F20 Oil %—estimated percentage of undiscovered oil volume allocated to additional specified Federal lands.

83. F20 Gas %—estimated percentage of undiscovered gas volume allocated to additional specified Federal lands.

The own####.tab table contains 59 columns. The sum of the percentages should equal 100. Data columns for these files are 

as follows:

1. Code—assessment-unit code number.

2. Name—assessment-unit name.

3. Area km2—area of the assessment unit in square kilometers.

4. Fed—“Federal Lands,” all Federal lands that occupy all or part of the assessment-unit area.

5. Fed Area %—percentage of assessment-unit area that is occupied by Federal lands.

6. Fed Oil %—estimated percentage of undiscovered oil volume allocated to Federal lands.

7. Fed Gas %—estimated percentage of undiscovered gas volume allocated to Federal lands.

8. Pri—“Private Lands,” all private lands that occupy all or part of the assessment-unit area.

9. Pri Area %—percentage of assessment-unit area that is occupied by private lands.

10. Pri Oil %—estimated percentage of undiscovered oil volume allocated to private lands.

11. Pri Gas %—estimated percentage of undiscovered gas volume allocated to private lands.

12. Tri—“Tribal Lands,” all tribal lands that occupy all or part of the assessment-unit area.

13. Tri Area %—percentage of assessment-unit area that is occupied by tribal lands.

14. Tri Oil %—estimated percentage of undiscovered oil volume allocated to tribal lands.

15. Tri Gas %—estimated percentage of undiscovered gas volume allocated to tribal lands.

16. Oth—name of other unspecified lands or offshore areas that occupy all or part of the assessment-unit area.

17. Oth Area %—percentage of assessment-unit area that is occupied by other unspecified lands or offshore areas.

18. Oth Oil %—estimated percentage of undiscovered oil volume allocated to other unspecified lands or offshore areas.

19. Oth Gas %—estimated percentage of undiscovered gas volume allocated to other unspecified lands or offshore areas.

20. State 1—name of first State for which State-owned lands or waters occupy all or part of the assessment-unit area.

21. S1 Area %—percentage of assessment-unit area that is occupied by State 1-owned lands or waters.

22. S1 Oil %—estimated percentage of undiscovered oil volume allocated to State 1-owned lands or waters.
Tabular Data 9

23. S1 Gas %—estimated percentage of undiscovered gas volume allocated to State 1-owned lands or waters.

24. State 2—name of second State for which State-owned lands or waters occupy all or part of the assessment-unit area.

25. S2 Area %—percentage of assessment-unit area that is occupied by State 2-owned lands or waters.

26. S2 Oil %—estimated percentage of undiscovered oil volume allocated to State 2-owned lands or waters.

27. S2 Gas %—estimated percentage of undiscovered gas volume allocated to State 2-owned lands or waters.

28. State 3—name of third State for which State-owned lands or waters occupy all or part of the assessment-unit area.

29. S3 Area %—percentage of assessment-unit area that is occupied by State 3-owned lands or waters.

30. S3 Oil %—estimated percentage of undiscovered oil volume allocated to State 3-owned lands or waters.

31. S3 Gas %—estimated percentage of undiscovered gas volume allocated to State 3-owned lands or waters.

32. State 4—name of fourth State for which State-owned lands or waters occupy all or part of the assessment-unit area.

33. S4 Area %—percentage of assessment-unit area that is occupied by State 4-owned lands or waters.

34. S4 Oil %—estimated percentage of undiscovered oil volume allocated to State 4-owned lands or waters.

35. S4 Gas %—estimated percentage of undiscovered gas volume allocated to State 4-owned lands or waters.

36. State 5—name of fifth State for which State-owned lands or waters occupy all or part of the assessment-unit area.

37. S5 Area %—percentage of assessment-unit area that is occupied by State 5-owned lands or waters.

38. S5 Oil %—estimated percentage of undiscovered oil volume allocated to State 5-owned lands or waters.

39. S5 Gas %—estimated percentage of undiscovered gas volume allocated to State 5-owned lands or waters.

40. State 6—name of sixth State for which State-owned lands or waters occupy all or part of the assessment-unit area.

41. S6 Area %—percentage of assessment-unit area that is occupied by State 6-owned lands or waters.

42. S6 Oil %—estimated percentage of undiscovered oil volume allocated to State 6-owned lands or waters.

43. S6 Gas %—estimated percentage of undiscovered gas volume allocated to State 6-owned lands or waters.

44. State 7—name of seventh State for which State-owned lands or waters occupy all or part of the assessment-unit area.

45. S7 Area %—percentage of assessment-unit area that is occupied by State 7-owned lands or waters.

46. S7 Oil %—estimated percentage of undiscovered oil volume allocated to State 7-owned lands or waters.

47. S7 Gas %—estimated percentage of undiscovered gas volume allocated to State 7-owned lands or waters.

48. State 8—name of eighth State for which State-owned lands or waters occupy all or part of the assessment-unit area.

49. S8 Area %—percentage of assessment-unit area that is occupied by State 8-owned lands or waters.

50. S8 Oil %—estimated percentage of undiscovered oil volume allocated to State 8-owned lands or waters.

51. S8 Gas %—estimated percentage of undiscovered gas volume allocated to State 8-owned lands or waters.

52. State 9—name of ninth State for which State-owned lands or waters occupy all or part of the assessment-unit area.

53. S9 Area %—percentage of assessment-unit area that is occupied by State 9-owned lands or waters.

54. S9 Oil %—estimated percentage of undiscovered oil volume allocated to State 9-owned lands or waters.

55. S9 Gas %—estimated percentage of undiscovered gas volume allocated to State 9-owned lands or waters.

56. State 10—name of tenth State for which State-owned lands or waters occupy all or part of the assessment-unit area.
10 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

57. S10 Area %—percentage of assessment-unit area that is occupied by State 10-owned lands or waters.

58. S10 Oil %—estimated percentage of undiscovered oil volume allocated to State 10-owned lands or waters.

59. S10 Gas %—estimated percentage of undiscovered gas volume allocated to State 10-owned lands or waters.

The sta####.tab table contains 59 columns. The sum of the percentages should equal 100. Data columns for these files are 

as follows:

1. Code—assessment-unit code number.

2. Name—assessment-unit name.

3. Area km2—area of the assessment unit in square kilometers.

4. State 1—name of first State (onshore and offshore) that occupies all or part of the assessment-unit area.

5. S1 Area %—percentage of assessment-unit area that is occupied by State 1.

6. S1 Oil %—estimated percentage of undiscovered oil volume allocated to State 1.

7. S1 Gas %—estimated percentage of undiscovered gas volume allocated to State 1.

8. State 2—name of second State (onshore and offshore) that occupies all or part of the assessment-unit area.

9. S2 Area %—percentage of assessment-unit area that is occupied by State 2.

10. S2 Oil %—estimated percentage of undiscovered oil volume allocated to State 2.

11. S2 Gas %—estimated percentage of undiscovered gas volume allocated to State 2.

12. State 3—name of third State (onshore and offshore) that occupies all or part of the assessment-unit area.

13. S3 Area %—percentage of assessment-unit area that is occupied by State 3.

14. S3 Oil %—estimated percentage of undiscovered oil volume allocated to State 3.

15. S3 Gas %—estimated percentage of undiscovered gas volume allocated to State 3.

16. State 4—name of fourth State (onshore and offshore) that occupies all or part of the assessment-unit area.

17. S4 Area %—percentage of assessment-unit area that is occupied by State 4.

18. S4 Oil %—estimated percentage of undiscovered oil volume allocated to State 4.

19. S4 Gas %—estimated percentage of undiscovered gas volume allocated to State 4.

20. State 5—name of fifth State (onshore and offshore) that occupies all or part of the assessment-unit area.

21. S5 Area %—percentage of assessment-unit area that is occupied by State 5.

22. S5 Oil %—estimated percentage of undiscovered oil volume allocated to State 5.

23. S5 Gas %—estimated percentage of undiscovered gas volume allocated to State 5.

24. State 6—name of sixth State (onshore and offshore) that occupies all or part of the assessment-unit area.

25. S6 Area %—percentage of assessment-unit area that is occupied by State 6.

26. S6 Oil %—estimated percentage of undiscovered oil volume allocated to State 6.

27. S6 Gas %—estimated percentage of undiscovered gas volume allocated to State 6.

28. State 7—name of seventh State (onshore and offshore) that occupies all or part of the assessment-unit area.

29. S7 Area %—percentage of assessment-unit area that is occupied by State 7.

30. S7 Oil %—estimated percentage of undiscovered oil volume allocated to State 7.
Tabular Data 11

31. S7 Gas %—estimated percentage of undiscovered gas volume allocated to State 7.

32. State 8—name of eighth State (onshore and offshore) that occupies all or part of the assessment-unit area.

33. S8 Gas %—percentage of assessment-unit area that is occupied by State 8.

34. S8 Oil %—estimated percentage of undiscovered oil volume allocated to State 8.

35. S8 Gas %—estimated percentage of undiscovered gas volume allocated to State 8.

36. State 9—name of ninth State (onshore and offshore) that occupies all or part of the assessment-unit area.

37. S9 Area %—percentage of assessment-unit area that is occupied by State 9.

38. S9 Oil %—estimated percentage of undiscovered oil volume allocated to State 9.

39. S9 Gas %—estimated percentage of undiscovered gas volume allocated to State 9.

40. State 10—name of tenth State (onshore and offshore) that occupies all or part of the assessment-unit area.

41. S10 Area %—percentage of assessment-unit area that is occupied by State 10.

42. S10 Oil %—estimated percentage of undiscovered oil volume allocated to State 10.

43. S10 Gas %—estimated percentage of undiscovered gas volume allocated to State 10.

44. State 11—name of eleventh State (onshore and offshore) that occupies all or part of the assessment-unit area.

45. S11 Area %—percentage of assessment-unit area that is occupied by State 11.

46. S11 Oil %—estimated percentage of undiscovered oil volume allocated to State 11.

47. S11 Gas %—estimated percentage of undiscovered gas volume allocated to State 11.

48. State 12—name of twelfth State (onshore and offshore) that occupies all or part of the assessment-unit area.

49. S12 Area %—percentage of assessment-unit area that is occupied by State 12.

50. S12 Oil %—estimated percentage of undiscovered oil volume allocated to State 12.

51. S12 Gas %—estimated percentage of undiscovered gas volume allocated to State 12.

52. State 13—name of thirteenth State (onshore and offshore) that occupies all or part of the assessment-unit area.

53. S13 Area %—percentage of assessment-unit area that is occupied by State 13.

54. S13 Oil %—estimated percentage of undiscovered oil volume allocated to State 13.

55. S13 Gas %—estimated percentage of undiscovered gas volume allocated to State 13.

56. State 14—name of fourteenth State (onshore and offshore) that occupies all or part of the assessment-unit area.

57. S14 Area %—percentage of assessment-unit area that is occupied by State 14.

58. S14 Oil %—estimated percentage of undiscovered oil volume allocated to State 14.

59. S14 Gas %—estimated percentage of undiscovered gas volume allocated to State 14.

The vol####.tab table contains estimates of undiscovered petroleum resources along with parameters that express uncertainty in these estimates. The table contains 40 columns. Blank cells represent no data. Data columns for these files are as 

follows:

1. Code—assessment-unit code number.

2. Name—assessment-unit name.

3. Type—type of assessment unit, conventional, continuous oil, continuous gas, or coalbed gas.
12 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

4. Status—remarks indicating that assessment unit was not quantitatively assessed; otherwise blank.

5. Prob %—geologic probability of the assessment unit.

6. OILF95 MMB—the estimated value of undiscovered oil (oil in oil accumulations) such that there is a 95-percent probability 

that this amount or more exists in the assessment unit. The volume is given in millions of barrels of oil (MMBO).

7. OILF50 MMB—the estimated value of undiscovered oil (oil in oil accumulations) such that there is a 50-percent probability 

that this amount or more exists in the assessment unit. This is the median value. The volume is given in millions of barrels 

of oil (MMBO).

8. OILF5 MMB—the estimated value of undiscovered oil (oil in oil accumulations) such that there is a 5-percent probability 

that this amount or more exists in the assessment unit. The volume is given in millions of barrels of oil (MMBO).

9. OILMN MMB—the estimated mean (average) value of undiscovered oil (oil in oil accumulations). The volume is given in 

millions of barrels of oil (MMBO).

10. OILSD MMB—the estimated standard deviation value of undiscovered oil (oil in oil accumulations). The volume is given 

in millions of barrels of oil (MMBO).

11. AGF95 BCF—the estimated value of undiscovered associated/dissolved gas (gas in oil accumulations) such that there is a 

95-percent probability that this amount or more exists in the assessment unit. The volume is given in billions of cubic feet of 

gas (BCFG).

12. AGF50 BCF—the estimated value of undiscovered associated/dissolved gas (gas in oil accumulations) such that there is a 

50-percent probability that this amount or more exists in the assessment unit. This is the median value. The volume is given 

in billions of cubic feet of gas (BCFG).

13. AGF5 BCF—the estimated value of undiscovered associated/dissolved gas (gas in oil accumulations) such that there is a 

5-percent probability that this amount or more exists in the assessment unit. The volume is given in billions of cubic feet of 

gas (BCFG).

14. AGMN BCF—the estimated mean (average) value of undiscovered associated/dissolved gas (gas in oil accumulations). The 

volume is given in billions of cubic feet of gas (BCFG).

15. AGSD BCF—the estimated standard deviation value of undiscovered associated/dissolved gas (gas in oil accumulations). 

The volume is given in billions of cubic feet of gas (BCFG).

16. NGLF95 MMB—the estimated value of undiscovered natural gas liquids (NGL in oil accumulations) such that there is a 

95-percent probability that this amount or more exists in the assessment unit. The volume is given in millions of barrels of 

NGL (MMBNGL).

17. NGLF50 MMB—the estimated value of undiscovered natural gas liquids (NGL in oil accumulations) such that there is a 

50-percent probability that this amount or more exists in the assessment unit. This is the median value. The volume is given 

in millions of barrels of NGL (MMBNGL).

18. NGLF5 MMB—the estimated value of undiscovered natural gas liquids (NGL in oil accumulations) such that there is a 

5-percent probability that this amount or more exists in the assessment unit. The volume is given in millions of barrels of 

NGL (MMBNGL).

19. NGLMN MMB—the estimated mean (average) value of undiscovered natural gas liquids (NGL in oil accumulations). The 

volume is given in millions of barrels of NGL (MMBNGL).

20. NGLSD MMB—the estimated standard deviation value of undiscovered natural gas liquids (NGL in oil accumulations). 

The volume is given in millions of barrels of NGL (MMBNGL).

21. NGF95 BCF—the estimated value of undiscovered nonassociated gas (gas in gas accumulations) such that there is a 95-percent probability that this amount or more exists in the assessment unit. The volume is given in billions of cubic feet of gas 

(BCFG).
Tabular Data 13

22. NGF50 BCF—the estimated value of undiscovered nonassociated gas (gas in gas accumulations) such that there is a 50-percent probability that this amount or more exists in the assessment unit. This is the median value. The volume is given in 

billions of cubic feet of gas (BCFG).

23. NGF5 BCF—the estimated value of undiscovered nonassociated gas (gas in gas accumulations) such that there is a 5-percent probability that this amount or more exists in the assessment unit. The volume is given in billions of cubic feet of gas 

(BCFG).

24. NGMN BCF—the estimated mean (average) value of undiscovered nonassociated gas (gas in gas accumulations). The volume is given in billions of cubic feet of gas (BCFG).

25. NGSD BCF—the estimated standard deviation value of undiscovered nonassociated gas (gas in gas accumulations). The 

volume is given in billions of cubic feet of gas (BCFG).

26. LIQF95 MMB—the estimated value of undiscovered liquids (oil and NGL in gas accumulations) such that there is a 95-percent probability that this amount or more exists in the assessment unit. The volume is given in millions of barrels of liquids 

(MMBL).

27. LIQF50 MMB—the estimated value of undiscovered liquids (oil and NGL in gas accumulations) such that there is a 50-percent probability that this amount or more exists in the assessment unit. This is the median value. The volume is given in 

millions of barrels of liquids (MMBL).

28. LIQF5 MMB—the estimated value of undiscovered liquids (oil and NGL in gas accumulations) such that there is a 5-percent probability that this amount or more exists in the assessment unit. The volume is given in millions of barrels of liquids 

(MMBL).

29. LIQMN MMB—the estimated mean (average) value of undiscovered liquids (oil and NGL in gas accumulations). The volume is given in millions of barrels of liquids (MMBL).

30. LIQSD MMB—the estimated standard deviation value of undiscovered liquids (oil and NGL in gas accumulations). The 

volume is given in millions of barrels of liquids (MMBL).

31. LOF95 MMB—the estimated size of the largest undiscovered conventional oil accumulation such that there is a 95-percent 

probability of that accumulation being this amount or larger. The volume is given in millions of barrels of oil (MMBO).

32. LOF50 MMB—the estimated size of the largest undiscovered conventional oil accumulation such that there is a 50-percent 

probability of that accumulation being this amount or larger. This is the median value. The volume is given in millions of 

barrels of oil (MMBO).

33. LOF5 MMB—the estimated size of the largest undiscovered conventional oil accumulation such that there is a 5-percent 

probability of that accumulation being this amount or larger. The volume is given in millions of barrels of oil (MMBO).

34. LOMN MMB—the estimated mean (average) value of the largest undiscovered conventional oil accumulation. The volume 

is given in millions of barrels of oil (MMBO).

35. LOSD MMB—the estimated standard deviation value of the largest undiscovered conventional oil accumulation. The volume is given in millions of barrels of oil (MMBO).

36. LGF95 BCF—the estimated size of the largest undiscovered conventional gas accumulation such that there is a 95-percent 

probability of that accumulation being this amount or larger. The volume is given in billions of cubic feet of gas (BCFG).

37. LGF50 BCF—the estimated size of the largest undiscovered conventional gas accumulation such that there is a 50-percent 

probability of that accumulation being this amount or larger. This is the median value. The volume is given in billions of 

cubic feet of gas (BCFG).

38. LGF5 BCF—the estimated size of the largest undiscovered conventional gas accumulation such that there is a 5-percent 

probability of that accumulation being this amount or larger. The volume is given in billions of cubic feet of gas (BCFG).

39. LGMN BCF—the estimated mean (average) value of the largest undiscovered conventional gas accumulation. The volume 

is given in billions of cubic feet of gas (BCFG).
14 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

40. LGSD BCF—the estimated standard deviation value of the largest undiscovered conventional gas accumulation. The volume is given in billions of cubic feet of gas (BCFG).

The inf####.tab table contains input data from the FORSPAN Assessment Model for Continuous Accumulations—Basic 

Input Data Form used in this assessment. Blank cells represent no data. This table contains 80 columns. Data columns are as 

follows:

1. Date—date of assessment.

2. Geol—assessing geologist’s name.

3. Regno—region code number.

4. Reg—region name.

5. Provno—province code number.

6. Prov—province name.

7. TPSno—total petroleum system code number.

8. TPS—total petroleum system name.

9. AUno—assessment-unit code number.

10. AU—assessment-unit name.

11. Data—data sources used to aid in completing the data-input form.

12. Comm—assessment unit type, the primary commodity type in the assessment unit, based on the gas-to-oil ratio (GOR) of 

the petroleum endowment, which includes both the discovered and undiscovered petroleum. An assessment unit is characterized as being oil prone if the gas-to-oil ratio (GOR) is less than 20,000 cubic feet of gas per barrel of oil; otherwise, it is 

gas prone.

13. RminMMBBCF—minimum total recovery per cell considered for assessment, in million barrels of oil (MMBO) for oil 

assessment units or billion cubic feet of gas (BCFG) for gas assessment units.

14. Numtest1—number of tested cells in the assessment unit.

15. Numtest2—number of tested cells in the assessment unit that have total recoveries equal to or larger than the specified minimum total recovery per cell.

16. AUM—assessment-unit maturity, the exploration maturity of the assessment unit. Assessment-unit maturity is classified as 

“established” if more than 24 cells exceed the minimum total recovery, “frontier” if 1 to 24 cells exceed the minimum total 

recovery, or “hypothetical” if no cells exceed the minimum total recovery.

17. Med1MMBBCF—median total recovery per cell of the set of tested cells equal to or greater than the minimum total recovery that constitute the first third of the total number of cells ranked according to date of discovery within the assessment 

unit, in million barrels of oil (MMBO) for oil assessment units or billion cubic feet of gas (BCFG) for gas assessment units.

18. Med2MMBBCF—median total recovery per cell of the set of tested cells equal to or greater than the minimum total recovery that constitute the second third of the total number of cells ranked according to date of discovery within the assessment 

unit, in million barrels of oil (MMBO) for oil assessment units or billion cubic feet of gas (BCFG) for gas assessment units.

19. Med3MMBBCF—median total recovery per cell of the set of tested cells equal to or greater than the minimum total recovery that constitute the third third of the total number of cells ranked according to date of discovery within the assessment 

unit, in million barrels of oil (MMBO) for oil assessment units or billion cubic feet of gas (BCFG) for gas assessment units.

20. Prob1 %—charge probability, the probability for adequate petroleum charge for at least one untested cell equal to or larger 

than the minimum total recovery, somewhere in the assessment unit, having the potential to be added to reserves. Charge 

probability is given as a fractional value from 0 to 1.0.
Tabular Data 15

21. Prob2 %—rocks probability, the probability for adequate reservoirs, traps, and seals for at least one untested cell equal to 

or larger than the minimum total recovery, somewhere in the assessment unit, having the potential to be added to reserves. 

Rocks probability is given as a fractional value from 0 to 1.0.

22. Prob3 %—timing probability, the probability for favorable geologic timing for at least one untested cell equal to or larger 

than the minimum total recovery, somewhere in the assessment unit, having the potential to be added to reserves. Timing 

probability is given as a fractional value from 0 to 1.0.

23. Geoprob %—geologic probability, the product of charge, rocks, and timing probabilities. Geologic probability is given as a 

fractional value from 0 to 1.0.

24. Prob4 %—accessibility probability, the probability for adequate location for necessary petroleum-related activities to 

discover at least one untested cell equal to or larger than the minimum total recovery, somewhere in the assessment unit, 

having the potential to be added to reserves. Accessibility probability is given as a fractional value from 0 to 1.0.

25. TAAmin a—minimum total assessment-unit area, the estimated minimum (F100) area of the assessment unit. The area is 

given in acres.

26. TAAmed a—median total assessment-unit area, the estimated median (F50) area of the assessment unit. The area is given in 

acres.

27. TAAmax a—maximum total assessment-unit area, the estimated maximum (F0) area of the assessment unit. The area is 

given in acres.

28. CAmin a—minimum area per cell of untested cells with potential, the estimated minimum (F100) area per cell of untested 

cells having the potential for additions to reserves in the assessment unit. This area is equivalent to the drainage area of 

wells. This area is given in acres.

29. CAmed a—median area per cell of untested cells with potential, the estimated median (F50) area per cell of untested cells 

having the potential for additions to reserves in the assessment unit. This area is equivalent to the drainage area of wells. 

This area is given in acres.

30. CAmax a—maximum area per cell of untested cells with potential, the estimated maximum (F0) area per cell of untested 

cells having the potential for additions to reserves in the assessment unit. This area is equivalent to the drainage area of 

wells. This area is given in acres.

31. TAAUmin %—estimated minimum (F100) percentage of the total assessment-unit area that is untested.

32. TAAUmed %—estimated median (F50) percentage of the total assessment-unit area that is untested.

33. TAAUmax %—estimated maximum (F0) percentage of the total assessment-unit area that is untested.

34. UAAPmin %—estimated minimum (F100) percentage of the untested area in the assessment unit having the potential for 

additions to reserves).

35. UAAPmed %—estimated median (F50) percentage of the untested area in the assessment unit having the potential for additions to reserves.

36. UAAPmax %—estimated maximum (F0) percentage of the untested area in the assessment unit having the potential for 

additions to reserves.

37. RminMMBBCF—estimated minimum (F100) total recovery per cell for untested cells in the assessment unit having the 

potential for additions to reserves. This volume is given as million barrels of oil (MMBO) for oil assessment units and billion cubic feet of gas (BCFG) for gas assessment units.

38. RmedMMBBCF—estimated median (F50) total recovery per cell for untested cells in the assessment unit having the potential for additions to reserves. This volume is given as million barrels of oil (MMBO) for oil assessment units and billion 

cubic feet of gas (BCFG) for gas assessment units.

39. RmaxMMBBCF—estimated maximum (F0) total recovery per cell for untested cells in the assessment unit having the 

potential for additions to reserves. This volume is given as million barrels of oil (MMBO) for oil assessment units and billion cubic feet of gas (BCFG) for gas assessment units.
16 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

40. GminCF/B—estimated minimum (F100) gas to oil ratio (GOR), in cubic feet of gas per barrel of oil (CFG/BO), of untested 

cells equal to or larger than the minimum total recovery in oil assessment units.

41. GmedCF/B—estimated median (F50) gas to oil ratio (GOR), in cubic feet of gas per barrel of oil (CFG/BO), of untested 

cells equal to or larger than the minimum total recovery in oil assessment units.

42. GmaxCF/B—estimated maximum (F0) gas to oil ratio (GOR), in cubic feet of gas per barrel of oil (CFG/BO), of untested 

cells equal to or larger than the minimum total recovery in oil assessment units.

43. NminB/MMCF—estimated minimum (F100) natural gas liquids (NGL) to gas ratio, in barrels of natural gas liquids per million cubic feet of gas (BNGL/MMCFG), of untested cells equal to or larger than the minimum total recovery in oil assessment units.

44. NmedB/MMCF—estimated median (F50) natural gas liquids (NGL) to gas ratio, in barrels of natural gas liquids per million 

cubic feet of gas (BNGL/MMCFG), of untested cells equal to or larger than the minimum total recovery in oil assessment 

units.

45. NmaxB/MMCF—estimated maximum (F0) natural gas liquids (NGL) to gas ratio, in barrels of natural gas liquids per million cubic feet of gas (BNGL/MMCFG), of untested cells equal to or larger than the minimum total recovery in oil assessment units.

46. LminB/MMCF—estimated minimum (F100) liquids (oil plus natural gas liquids) to gas ratio (LGR), in barrels of liquids 

per million cubic feet of gas (BNGL/MMCFG), of untested cells equal to or larger than the minimum total recovery in gas 

assessment units.

47. LmedB/MMCF—estimated median (F50) liquids (oil plus natural gas liquids) to gas ratio (LGR), in barrels of liquids per 

million cubic feet of gas (BNGL/MMCFG), of untested cells equal to or larger than the minimum total recovery in gas 

assessment units.

48. LmaxB/MMCF—estimated maximum (F0) liquids (oil plus natural gas liquids) to gas ratio (LGR), in barrels of liquids 

per million cubic feet of gas (BNGL/MMCFG), of untested cells equal to or larger than the minimum total recovery in gas 

assessment units.

49. APImin deg—estimated minimum (F100) API gravity, in degrees, of oil in untested cells in oil assessment units.

50. APImed deg—estimated median (F50) API gravity, in degrees, of oil in untested cells in oil assessment units.

51. APImax deg—estimated maximum (F0) API gravity, in degrees, of oil in untested cells in oil assessment units.

52. Smin %—estimated minimum (F100) sulfur content, in percent, of oil in untested cells in oil assessment units.

53. Smed %—estimated median (F50) sulfur content, in percent, of oil in untested cells in oil assessment units.

54. Smax %—estimated maximum (F0) sulfur content, in percent, of oil in untested cells in oil assessment units.

55. ODmin m—estimated minimum (F100) drilling depth, in meters, of oil in untested cells in oil assessment units.

56. ODmed m—estimated median (F50) drilling depth, in meters, of oil in untested cells in oil assessment units.

57. ODmax m—estimated maximum (F0) drilling depth, in meters, of oil in untested cells in oil assessment units.

58. OWDmin m—estimated minimum (F100) water depth, in meters, of oil in untested cells in oil assessment units (ocean, 

bays, or lakes; if applicable).

59. OWDmed m—estimated median (F50) water depth, in meters, of oil in untested cells in oil assessment units (ocean, bays, 

or lakes; if applicable).

60. OWDmax m—estimated maximum (F0) water depth, in meters, of oil in untested cells in oil assessment units (ocean, bays, 

or lakes; if applicable).

61. IGmin %—estimated minimum (F100) inert gas content, in percent, of gas in untested cells in gas assessment units (nitrogen and helium, and so forth).
Tabular Data 17

62. IGmed %—estimated median (F50) inert gas content, in percent, of gas in untested cells in gas assessment units (nitrogen 

and helium, and so forth).

63. IGmax %—estimated maximum (F0) inert gas content, in percent, of gas in untested cells in gas assessment units (nitrogen 

and helium, and so forth).

64. CO2min %—estimated minimum (F100) carbon dioxide content, in percent, of gas in untested cells in gas assessment units.

65. CO2med %—estimated median (F50) carbon dioxide content, in percent, of gas in untested cells in gas assessment units.

66. CO2max %—estimated maximum (F0) carbon dioxide content, in percent, of gas in untested cells in gas assessment units.

67. H2Smin %—estimated minimum (F100) hydrogen sulfide content, in percent, of gas in untested cells in gas assessment 

units.

68. H2Smed %—estimated median (F50) hydrogen sulfide content, in percent, of gas in untested cells in gas assessment units.

69. H2Smax %—estimated maximum (F0) hydrogen sulfide content, in percent, of gas in untested cells in gas assessment units.

70. GDmin m—estimated minimum (F100) drilling depth, in meters, of gas in untested cells in gas assessment units.

71. GDmed m—estimated median (F50) drilling depth, in meters, of gas in untested cells in gas assessment units.

72. GDmax m—estimated maximum (F0) drilling depth, in meters, of gas in untested cells in gas assessment units.

73. GWDmin m—estimated minimum (F100) water depth, in meters, of gas in untested cells in gas assessment units (ocean, 

bays, or lakes; if applicable).

74. GWDmed m—estimated median (F50) water depth, in meters, of gas in untested cells in gas assessment units (ocean, bays, 

or lakes; if applicable).

75. GWDmax m—estimated maximum (F0) water depth, in meters, of gas in untested cells in gas assessment units (ocean, 

bays, or lakes; if applicable).

76. FSRmean %—estimated mean future success ratio, as percent.

77. FSRmin %—estimated minimum (F100) future success ratio, as percent.

78. FSRmed %—estimated median (F50) future success ratio, as percent.

79. FSRmax %—estimated maximum (F100) future success ratio, as percent.

80. HSR %—historical success ratio, as percent.

The ins####.tab table contains input data from the Seventh Approximation Data Forms for Conventional Assessment Units 

used in this assessment and provided in the c######.pdf files. Cells are left blank if data are unavailable. This table contains 78 

columns. Data columns are as follows:

1. Date—date of assessment.

2. Geol—assessing geologist’s name.

3. Regno—region code number.

4. Reg—region name.

5. Provno—province code number.

6. Prov—province name.

7. TPSno—total petroleum system code number.

8. TPS—total petroleum system name.

9. AUno—assessment-unit code number.
18 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

10. AU—assessment-unit name.

11. Data—data sources used to aid in completing the data-input form.

12. Comm—primary commodity type in the assessment unit, based on the gas-to-oil ratio of the petroleum endowment, which 

includes both the discovered and undiscovered petroleum. An assessment unit is characterized as being oil prone if the gasto-oil ratio is less than 20,000 cubic feet of gas per barrel of oil; otherwise, it is gas prone.

13. Minsize MMB—minimum accumulation size considered for assessment, in million barrels of oil equivalent (MMBOE).

14. Numoil—number of oil accumulations equal to or larger than the minimum accumulation size discovered in the assessment 

unit.

15. Numgas—number of gas accumulations equal to or larger than the minimum accumulation size discovered in the assessment unit.

16. AUM—assessment-unit maturity, the exploration maturity of the assessment unit. Assessment-unit maturity is classified as 

“established” if more than 13 accumulations exceeding minimum size have been discovered, “frontier” if 1 to 13 accumulations exceeding minimum size have been discovered, or “hypothetical” if no accumulations exceeding minimum size have 

been discovered.

17. MedO1MMB—median size of the set of discovered oil accumulations that constitute the first one-third or one-half of the 

total number of oil accumulations ranked according to date of discovery within the assessment unit, in million barrels of oil 

(MMBO). This size is derived from known oil volumes that were adjusted upward to account for estimated future reserve 

growth.

18. MedO2MMB—median size of the set of discovered oil accumulations that constitute the second one-third or one-half of the 

total number of oil accumulations ranked according to date of discovery within the assessment unit, in million barrels of oil 

(MMBO). This size is derived from known oil volumes that were adjusted upward to account for estimated future reserve 

growth.

19. MedO3MMB—median size of the set of discovered oil accumulations that constitute the third one-third of the total number 

of oil accumulations ranked according to date of discovery within the assessment unit, in million barrels of oil (MMBO). 

This size is derived from known oil volumes that were adjusted upward to account for estimated future reserve growth.

20. MedG1BCF—median size of the set of discovered gas accumulations that constitute the first one-third or one-half of the 

total number of gas accumulations ranked according to date of discovery within the assessment unit, in billion cubic feet 

of gas (BCFG). This size is derived from known gas volumes that were adjusted upward to account for estimated future 

reserve growth.

21. MedG2BCF—median size of the set of discovered gas accumulations that constitute the second one-third or one-half of the 

total number of gas accumulations ranked according to date of discovery within the assessment unit, in billion cubic feet 

of gas (BCFG). This size is derived from known gas volumes that were adjusted upward to account for estimated future 

reserve growth.

22. MedG3BCF—median size of the set of discovered gas accumulations that constitute the third one-third of the total number 

of gas accumulations ranked according to date of discovery within the assessment unit, in billion cubic feet of gas (BCFG). 

This size is derived from known gas volumes that were adjusted upward to account for estimated future reserve growth.

23. Prob1 %—charge probability, the probability for adequate petroleum charge for at least one undiscovered accumulation 

equal to or larger than the minimum accumulation size, somewhere in the assessment unit, having the potential to be added 

to reserves. Charge probability is given as a fractional value from 0 to 1.0.

24. Prob2 %—rocks probability, the probability for adequate reservoirs, traps, and seals for at least one undiscovered accumulation equal to or larger than the minimum accumulation size, somewhere in the assessment unit, having the potential to be 

added to reserves. Rocks probability is given as a fractional value from 0 to 1.0.

25. Prob3 %—timing probability, the probability for favorable geologic timing for at least one undiscovered accumulation 

equal to or larger than the minimum accumulation size, somewhere in the assessment unit, having the potential to be added 

to reserves. Timing probability is given as a fractional value from 0 to 1.0Geoprob %—geologic probability, the product of 

charge, rocks, and timing probabilities. Geologic probability is given as a fractional value from 0 to 1.0.
Tabular Data 19

26. NOmin—estimated minimum (F100) number of undiscovered oil accumulations equal to or larger than the minimum accumulation size in the assessment unit.

27. NOmod—estimated mode of number of undiscovered oil accumulations equal to or larger than the minimum accumulation 

size in the assessment unit.

28. NOmax—estimated maximum (F0) number of undiscovered oil accumulations equal to or larger than the minimum accumulation size in the assessment unit.

29. NGmin—estimated minimum (F100) number of undiscovered gas accumulations equal to or larger than the minimum accumulation size in the assessment unit.

30. NGmod—estimated mode of number of undiscovered gas accumulations equal to or larger than the minimum accumulation 

size in the assessment unit.

31. NGmax—estimated maximum (F0) number of undiscovered gas accumulations equal to or larger than the minimum accumulation size in the assessment unit.

32. SOminMMB—estimated minimum (F100) size, in million barrels of oil (MMBO), of undiscovered oil accumulations in the 

assessment unit.

33. SOmedMMB—estimated median (F50) size, in million barrels of oil (MMBO), of undiscovered oil accumulations in the 

assessment unit.

34. SOmaxMMB—estimated maximum (F0) size, in million barrels of oil (MMBO), of undiscovered oil accumulations in the 

assessment unit.

35. SGminBCF—estimated minimum (F100) size, in billion cubic feet of gas (BCFG), of undiscovered gas accumulations in 

the assessment unit.

36. SGmedBCF—estimated median (F50) size, in billion cubic feet of gas (BCFG), of undiscovered gas accumulations in the 

assessment unit.

37. SGmaxBCF—estimated maximum (F0) size, in billion cubic feet of gas (BCFG), of undiscovered gas accumulations in the 

assessment unit.

38. GminCF/B—estimated minimum (F100) gas-to-oil ratio (GOR), in cubic feet of gas per barrel of oil (CFG/BO), of undiscovered oil accumulations equal to or larger than the minimum accumulation size in the assessment unit.

39. GmodCF/B—estimated mode of gas-to-oil ratio (GOR), in cubic feet of gas per barrel of oil (CFG/BO), of undiscovered oil 

accumulations equal to or larger than the minimum accumulation size in the assessment unit.

40. GmaxCF/B—estimated maximum (F0) gas-to-oil ratio (GOR), in cubic feet of gas per barrel of oil (CFG/BO), of undiscovered oil accumulations equal to or larger than the minimum accumulation size in the assessment unit.

41. NminB/MMCF—estimated minimum (F100) natural gas liquids (NGL) to gas ratio, in barrels of natural gas liquids per million cubic feet of gas (BNGL/MMCFG), of undiscovered oil accumulations equal to or larger than the minimum accumulation size in the assessment unit.

42. NmodB/MMCF—estimated mode of natural gas liquids (NGL) to gas ratio, in barrels of natural gas liquids per million 

cubic feet of gas (BNGL/MMCFG), of undiscovered oil accumulations equal to or larger than the minimum accumulation 

size in the assessment unit.

43. NmaxB/MMCF—estimated maximum (F0) natural gas liquids (NGL) to gas ratio, in barrels of natural gas liquids per million cubic feet of gas (BNGL/MMCFG), of undiscovered oil accumulations equal to or larger than the minimum accumulation size in the assessment unit.

44. LminB/MMCF—estimated minimum (F100) liquids (oil plus natural gas liquids) to gas ratio (LGR), in barrels of liquids 

per million cubic feet of gas (BL/MMCFG), of undiscovered gas accumulations equal to or larger than the minimum accumulation size in the assessment unit.
20 Tabular Data and Graphical Images in Support of the U.S. Geological Survey National Oil and Gas Assessment

45. LmodB/MMCF—estimated mode of liquids (oil plus natural gas liquids) to gas ratio (LGR), in barrels of liquids per million 

cubic feet of gas (BL/MMCFG), of undiscovered gas accumulations equal to or larger than the minimum accumulation size 

in the assessment unit.

46. LmaxB/MMCF—estimated maximum (F0) liquids (oil plus natural gas liquids) to gas ratio (LGR), in barrels of liquids per 

million cubic feet of gas (BL/MMCFG), of undiscovered gas accumulations equal to or larger than the minimum accumulation size in the assessment unit.

47. APImin deg—estimated minimum (F100) API gravity, in degrees, of oil in undiscovered oil accumulations in the assessment unit.

48. APImod deg—estimated mode of API gravity, in degrees, of oil in undiscovered oil accumulations in the assessment unit.

49. APImax deg—estimated maximum (F0) API gravity, in degrees, of oil in undiscovered oil accumulations in the assessment 

unit.

50. Smin %—estimated minimum (F100) sulfur content, in percent, of oil in undiscovered oil accumulations in the assessment 

unit.

51. Smod %—estimated mode of sulfur content, in percent, of oil in undiscovered oil accumulations in the assessment unit.

52. Smax %—estimated maximum (F0) sulfur content, in percent, of oil in undiscovered oil accumulations in the assessment 

unit.

53. ODmin m—estimated minimum (F100) drilling depth, in meters, of oil in untested cells in oil assessment units.

54. ODf75 m—estimated 75th fractile (F75) of drilling depth, in meters, of oil in untested cells in oil assessment units.

55. ODmod m—estimated mode of drilling depth, in meters, of oil in untested cells in oil assessment units.

56. ODf25 m—estimated 25th fractile (F25) drilling depth, in meters, of oil in untested cells in oil assessment units.

57. ODmax m—estimated maximum (F0) drilling depth, in meters, of oil in untested cells in oil assessment units.

58. OWDmin m—estimated minimum (F100) water depth, in meters, of oil in untested cells in oil assessment units (ocean, 

bays, or lakes; if applicable).

59. OWDmod m—estimated mode of water depth, in meters, of oil in untested cells in oil assessment units (ocean, bays, or 

lakes; if applicable).

60. OWDmax m—estimated maximum (F0) water depth, in meters, of oil in untested cells in oil assessment units (ocean, bays, 

or lakes; if applicable).

61. IGmin %—estimated minimum (F100) inert gas content, in percent, of gas in untested cells in gas assessment units (nitrogen and helium, and so forth).

62. IGmod %—estimated mode of inert gas content, in percent, of gas in untested cells in gas assessment units (nitrogen and 

helium, and so forth).

63. IGmax %—estimated maximum (F0) inert gas content, in percent, of gas in untested cells in gas assessment units (nitrogen 

and helium, and so forth).

64. CO2min %—estimated minimum (F100) carbon dioxide content, in percent, of gas in untested cells in gas assessment units.

65. CO2mod %—estimated mode of carbon dioxide content, in percent, of gas in untested cells in gas assessment units.

66. CO2max %—estimated maximum (F0) carbon dioxide content, in percent, of gas in untested cells in gas assessment units.

67. H2Smin %—estimated minimum (F100) hydrogen sulfide content, in percent, of gas in untested cells in gas assessment 

units.

68. H2Smod %—estimated mode of hydrogen sulfide content, in percent, of gas in untested cells in gas assessment units.

69. H2Smax %—estimated maximum (F0) hydrogen sulfide content, in percent, of gas in untested cells in gas assessment units.
References Cited 21

70. GDmin m—estimated minimum (F100) drilling depth, in meters, of gas in untested cells in gas assessment units.

71. GDf25 m—estimated 25th fractile (F25) drilling depth, in meters, of gas in untested cells in gas assessment units.

72. GDmod m—estimated mode of drilling depth, in meters, of gas in untested cells in gas assessment units.

73. GDf25 m—estimated 25th fractile (F25) drilling depth, in meters, of gas in untested cells in gas assessment units.

74. GDmax m—estimated maximum (F0) drilling depth, in meters, of gas in untested cells in gas assessment units.

75. GWDmin m—estimated minimum (F100) water depth, in meters, of gas in untested cells in gas assessment units (ocean, 

bays, or lakes; if applicable).

76. GWDmod m—estimated mode of water depth, in meters, of gas in untested cells in gas assessment units (ocean, bays, or 

lakes; if applicable).

77. GWDmax m—estimated maximum (F0) water depth, in meters, of gas in untested cells in gas assessment units (ocean, 

bays, or lakes; if applicable).

References Cited

IHS Energy Group, 2008a [includes data current as of December 2007], PI/Dwights Plus US production data: IHS Energy 

Group; database available from IHS Energy Group, 15 Inverness Way East, D205, Englewood, CO 80112, U.S.A.

IHS Energy Group, 2008b [includes data current as of December 2007], PI/Dwights Plus US well data: IHS Energy Group; 

database available from IHS Energy Group, 15 Inverness Way East, D205, Englewood, CO 80112, U.S.A.

Click here to return to

Volume Title Page