Top 100 U.S. Oil and Gas Fields
Top 100 U.S. Oil and Gas Fields
March 2015
Independent Statistics & Analysis
U.S. Department of Energy Washington, DC 20585
This report was prepared by the U.S. Energy Information Administration (EIA), the statistical and analytical agency within the U.S. Department of Energy. By law, EIA's data, analyses, and forecasts are independent of approval by any other officer or employee of the United States Government. The views in this report therefore should not be construed as representing those of the Department of Energy or other Federal agencies.
U.S. Energy Information Administration | Top 100 U.S. Oil and Gas Fields
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Table of Contents
Top 100 U.S. Oil and Gas Fields..................................................................................................................... 1 Introduction ............................................................................................................................................. 1 The top 100's share of U.S. proved reserves in 2013 .............................................................................. 1
Changes since 2009....................................................................................................................................... 4 Changes in the top 100 Oil Fields ............................................................................................................ 4 Changes in the top 100 gas fields ............................................................................................................ 4 Top 100 fields ranking tables ................................................................................................................... 4
U.S. Energy Information Administration | Top 100 U.S. Oil and Gas Fields
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Figures
Figure 1. U.S. proved reserves of crude oil and lease condensate, 1993-2013............................................ 1 Figure 2. U.S. proved reserves of total natural gas, 1993-2013 ................................................................... 2 Figure 3. Distribution of U.S. proved reserves, 2013 (in groups of 10) ........................................................ 3
U.S. Energy Information Administration | Top 100 U.S. Oil and Gas Fields
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Tables
Table 1. Top 100 U.S. oil fields as of December 31, 2013............................................................................. 5 Table 2. Top 100 U.S. gas fields as of December 31, 2013 ........................................................................... 8
U.S. Energy Information Administration | Top 100 U.S. Oil and Gas Fields
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Top 100 U.S. Oil and Gas Fields
Introduction
This supplement to the U.S. Energy Information Administration's (EIA) U.S. Crude Oil and Natural Gas Proved Reserves, 2013 ranks the 100 largest U.S. oil and gas fields by their estimated 2013 proved reserves.
EIA defines a field as "an area consisting of a single reservoir or multiple reservoirs all grouped on, or related to, the same individual geological structural feature and/or stratigraphic condition. There may be two or more reservoirs in a field that are separated vertically by intervening impervious strata or laterally by local geologic barriers, or by both." This definition is not used by all states in their designation of fields; consequently, areas classified as individual fields by some states may be found combined in these tables or in the EIA Field Code Master List.
Particularly in the case of unconventional shale plays for both crude oil and natural gas, multiple areas or fields may have been combined into one entry within these ranking tables. The resultant field entry in the table is labeled as an area or unit, e.g., Marcellus Shale Area, Haynesville Shale Unit, Spraberry Trend Area, and Hugoton Gas Area.
The oil field production and reserves data include both crude oil and lease condensate. The gas field production and reserves data are total natural gas, wet after lease separation, which is the sum of associateddissolved natural gas and nonassociated natural gas with natural gas plant liquids not yet removed.
The top 100's share of U.S. proved reserves in 2013
The top 100 oil fields as of December 31, 2013, accounted for 20.6 billion barrels of crude oil and lease condensate proved reserves, which was 56% of the U.S. total (36.5 billion barrels) in 2013 (Figure 1).
Figure 1. U.S. proved reserves of crude oil and lease condensate, 1993-2013
billion barrels
40
U.S. crude oil and lease condensate proved reserves 35
30
Top 100 fields reserves subtotal
25
20
15
10
5
0
Notes: Annual Reports in 1994-95 featured a reprint of 1993 top 100 fields data. No top 100 fields data were published in 2010-12. Sources: U.S. Energy Information Administration, Form EIA-23L, Annual Survey of Domestic Oil and Gas Reserves, 2013. U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Proved Reserves (DOE/EIA-0216), Annual Reports 1993-2009.
U.S. Energy Information Administration | Top 100 U.S. Oil and Gas Fields
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The top 100 gas fields as of December 31, 2013, accounted for 239.7 trillion cubic feet of total natural gas proved reserves, about 68% of the U.S. total natural gas proved reserves in 2013 (Figure 2). Figure 2. U.S. proved reserves of total natural gas, 1993-2013
trillion cubic feet 400 U.S. total natural gas proved reserves 350 Top 100 fields reserves subtotal 300 250 200 150 100 50 0
Notes: Annual Reports in 1994-95 featured a reprint of 1993 top 100 fields data. No top 100 fields data were published in 2010-12. Sources: U.S. Energy Information Administration, Form EIA-23L, Annual Survey of Domestic Oil and Gas Reserves, 2013. U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Proved Reserves (DOE/EIA-0216), Annual Reports 1993-2009.
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Figure 3. Distribution of U.S. proved reserves, 2013 (in groups of 10)
percentage of U.S. proved reserves
March 2015
Note: In some fields, only one or very few operators are the source of proved reserves estimates. Therefore, EIA does not provide fieldspecific proved reserves estimates in order to avoid compromising proprietary data. Instead, EIA combines the proved reserves estimates of the top 100 fields into groups of 10 to provide a sense of the operated concentration of total proved reserves, while still protecting data sources. Columns may not add to 100% because of independent rounding. Source: U.S. Energy Information Administration, Form EIA-23L, Annual Survey of Domestic Oil and Gas Reserves, 2013.
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