Rank by 2006 Assets	Company	Worldwide Liquids Production, Million Barrels	Worldwide Natural Gas Production, Billion Cubic Feet
1	Exxon Mobil Corporation	832.0	2,771.0
2	ConocoPhillips	534.0	2,070.0
3	Chevron Corporation	632.0	1,809.0
4	Anadarko Petroleum Corporation	86.0	644.0
5	Devon Energy Corporation	78.0	815.0
6	Occidental Petroleum Corporation	142.0	272.0
7	Marathon Oil Corporation	86.0	290.0
8	El Paso Corporation	7.686	220.0
9	Chesapeake Energy Corporation	6.764	322.0
10	Apache Corporation	86.25	580.0
11	Hess Corporation	94.00	239.0
12	Dominion Exploration and Production	24.95	318.0
13	XTO Energy Inc.	20.80	433.0
14	Noble Energy Inc.	27.34	227.3
15	EOG Resources, Inc.	13.65	493.7
16	Williams Companies, Inc.	NA	277.0
17	Murphy Oil Corporation	27.70	28.50
18	Pioneer Natural Resources Company	17.82	166.8
19	Pogo Producing Company <2>	13.48	102.0
20	Newfield Exploration Company	9.000	189.6
21	Questar Corporation	2.600	113.9
22	Cimarex Energy Company	0.269	0.868
23	Helix Energy Solutions Group Inc.	3.400	27.95
24	Petrohawk Energy Corp.	1.555	20.22
25	Forest Oil Corporation	8.026	73.02
26	Range Resources Corporation	4.252	75.27
27	W&T Offshore Inc.	6.456	60.45
28	Cheniere Energy Inc.	0.003	0.318
29	Whiting Petroleum Corp.	0.670	4.009
30	Plains Exploration & Production Company	18.98	20.63
31	Southwestern Energy Co.	0.698	68.13
32	Denbury Resources, Inc.	8.372	30.32
33	Stone Energy Corporation	5.593	43.51
34	Encore Acquisition Co.	7.335	23.56
35	St. Mary Land & Exploration Co.	6.057	56.45
36	Quicksilver Resources Inc.	1.333	53.27
37	Comstock Resources Inc.	2.304	53.45
38	Unit Corporation	1.452	44.17
39	Kinder Morgan CO2 Co. LP	15.63	0.461
40	Cabot Oil & Gas Corporation	1.415	79.72
41	Energen Resources Corporation	3.645	62.82
42	Equitable Supply	0.112	80.70
43	The Houston Exploration Co. <1>	0.938	82.53
44	Penn Virginia Corporation	0.382	28.97
45	Swift Energy Company	7.903	22.67
46	ATP Oil & Gas Corp.	3.273	31.22
47	Ultra Petroleum Corp.	2.198	78.40
48	Rosetta Resources Inc.	0.576	30.00
49	Seneca Resources Corporation	3.608	25.77
50	Berry Petroleum Co.	7.183	12.53

Source: "OGJ200 expands as 2006 earnings, spending surge," Oil & Gas Journal, September 17, 2007.

Notes:
1. Acquired by Forest Oil
2. Merged with Plains Exploration and Production Company

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Updated 09/05/14

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