Unocal is one of the world's leading independent natural gas and crude oil exploration and production companies. With more than 6,000 employees, the company's principal oil and gas activities are in Asia and North America. Unocal has no refining or marketing operations.

EnCana Corporation (EnCana) is a natural gas producer. The Company is one of the holders of natural gas and oil resource lands onshore North America. EnCana's other operations include the transportation and marketing of crude oil, natural gas and natural gas liquids, as well as the... more

Kerr-McGee is an Oklahoma City-based energy and inorganic chemical company with worldwide operations and assets of more than $16 billion.

BP p.l.c. (BP) is a holding company. With effect from January 1, 2008, the Company operates in two business segments: Exploration and Production, and Refining and Marketing. A separate business, Alternative Energy, handles the Company’s low-carbon businesses and options outside oil and... more

CNOOC Limited is a producer of offshore crude oil and natural gas and an independent oil and gas exploration and production company. It mainly engages in oil and natural gas exploration, development, production and sales. The Company has four major oil production areas offshore China:... more

Devon Energy Corporation (Devon) is an independent energy company engaged primarily in oil and gas exploration, development and production, the acquisition of producing properties, the transportation of oil, gas and natural gas liquids and the processing of natural gas. Devon owns oil and... more

Anadarko Petroleum Corporation (Anadarko) is an oil and gas exploration and production company with 2.43 billion barrels of oil equivalent (BOE) of proved reserves as of December 31, 2007. The Company’s major areas of operation are located onshore in the United States, the deepwater of... more

Talisman Energy Inc. (Talisman) is an independent, Canada-based, international upstream oil and gas company whose main business activities include exploration, development, production, transportation and marketing of crude oil, natural gas and natural gas liquids (NGLs). The Company's... more

Amerada Hess, headquartered in New York, is a global integrated energy company engaged in the exploration for and the production, purchase, transportation and sale of crude oil and natural gas, as well as the production and sale of refined petroleum products.

Burlington Resources Inc. is one of the world's largest independent oil and natural gas exploration and production companies, and ranks among North America's leading producers. Our hallmarks include a focus on natural gas, long-life reserves, strong cash flow generation throughout the... more

Apache Corporation is an independent energy company that explores for, develops and produces natural gas, crude oil and natural gas liquids. In North America, the Company's exploration and production interests are focused in the Gulf of Mexico, the Gulf Coast, East Texas, the Permian... more

Tullow Oil plc is an independent exploration and production companies. The Company has a balanced portfolio of oil and gas assets, across 23 countries with an interest in 106 licenses. During the year ended December 31, 2007, the Company’s producing assets output was 73,100 barrels of oil... more

Hess Corporation (Hess) is a global integrated energy company that operates in two segments: Exploration and Production (E&P) and Marketing and Refining (M&R). The E&P segment explores for, develops, produces, purchases, transports and sells crude oil and natural gas. These exploration... more

Newfield Exploration Company is an independent oil and gas company engaged in the exploration, development and acquisition of natural gas and crude oil properties. The Company’s domestic areas of operation include the Anadarko and Arkoma Basins of the Mid-Continent, the Rocky Mountains,... more

Canadian Natural Resources Limited (Canadian Natural) is a Canada-based independent energy company engaged in the acquisition, exploration, development, production, marketing and sale of crude oil, natural gas liquids (NGLs), natural gas and bitumen production. The Company's conventional... more

EOG Resources, Inc. (EOG), together with its subsidiaries, explores for, develops, produces and markets natural gas and crude oil primarily in major producing basins in the United States, Canada, offshore Trinidad, the United Kingdom North Sea and other international areas. As of December... more

Stone Energy Corporation (Stone Energy) is an independent oil and natural gas company. The Company is engaged in the acquisition and subsequent exploration, development, operation and production of oil and gas properties located primarily in the Gulf of Mexico (GOM). It also has... more

Venoco, Inc. is an independent energy company primarily engaged in the acquisition, exploration, exploitation and development of oil and natural gas properties with a focus on properties offshore and onshore California and the Gulf Coast of Texas. The Company’s principal properties are... more

PetroQuest Energy, Inc. is an independent oil and gas company with operations in Oklahoma, Texas, Arkansas and the Gulf Coast Basin. The Company’s drilling operations targeting the Fayetteville Shale began in September 2007. In addition, drilling activity continued in Oklahoma and Texas,... more

Sonoran Energy, Inc. (Sonoran) is an independent oil and gas company engaged in the acquisition, development, production and exploration of oil and gas properties located primarily in North America. Sonoran’s portfolio consisted of Company-operated assets located in Louisiana and Texas,... more

Cimarex Energy Co. is an independent oil and gas exploration and production company. The Company's operations are mainly located in Texas, Oklahoma, New Mexico, Kansas, Louisiana and Wyoming. Proved oil and gas reserves as of December 31, 2007, totaled nearly 1.5 trillion cubic feet... more

AEC (Alberta Energy Company Ltd.) is focused on Growth, Value and Performance as it builds a Super-Independent oil and gas company. This strategy capitalizes on the world-class assets and high-quality, long-life reserves that AEC has established in its three strong growth platforms -... more

Magnum Hunter Resources, Inc. is one of the nation's fastest growing independent exploration and development companies engaged in three principal activities: (1) the exploration, development and production of crude oil, condensate and natural gas; (2) the gathering, transmission and... more

Cheniere Energy, Inc. (Cheniere), through its subsidiaries, is engaged primarily in the business of developing and constructing, and then owning and operating, a network of three onshore liquefied natural gas (LNG) receiving terminals and natural gas pipelines. The Company is developing a... more

Ocean Energy, Inc. is an independent energy company engaged in the exploration, development, production, and acquisition of crude oil and natural gas. North American operations are focused in the shelf and deepwater areas of the Gulf of Mexico, the Rocky Mountains, Permian Basin,... more

Range Resources Corporation (Range) is engaged in the exploration, development and acquisition of oil and gas properties, primarily in the Southwestern, Appalachian and Gulf Coast regions of the United States. During the year ended December 31, 2007, the Company’s proved reserves... more

EXCO Resources, Inc. (EXCO) is an independent oil and natural gas company engaged in the acquisition, development and exploitation of onshore North American oil and natural gas properties. The Company’s operations are focused in key North American oil and natural gas areas, including East... more

 MoreRight Banner Recommended offer by Eni UK Holding plc (“Eni Holdingâ€) for Burren Energy plc (“Burrenâ€)Click here to view...

Whiting Petroleum Corporation is an independent oil and gas company engaged in acquisition, development, exploitation, production and exploration activities primarily in the Permian Basin, Rocky Mountains, Mid-Continent, Gulf Coast and Michigan regions of the United States. As of December... more

In the United States, Oxy is the largest oil producer in Texas and the largest natural gas producer in California, with additional operations in Kansas, Oklahoma and New Mexico. In the Middle East - North Africa, Oxy has assets in Libya, Oman, Qatar, Yemen and is a partner in the... more

Tipperary Corporation is an independent energy company focused primarily on exploration for, and production of, coalbed methane and conventional natural gas. Headquartered in Denver, Colorado, Tipperary owns 90% of Queensland, Australia-based Tipperary Oil & Gas (Australia) Pty Ltd. This... more

Sibir Energy plc (Sibir) is an independent oil and gas exploration and production company. The Company is also engaged in the refining of oil and the sale of oil and gas products. Its areas of oil and gas exploration and production activity are in the Khanty-Mansiysk Okrug in Western... more

Penn West Energy Trust (Penn West) is an open-ended investment trust. The Trust’s principal undertaking is to issue Trust Units, and to acquire and hold securities of subsidiaries, net profits interests (NPI), royalties, notes and other interests. Its direct and indirect subsidiaries and... more

Petrogen is also currently working in collaboration with its affiliated company to complete the acquisition of four additional property opportunities that fall within the same criteria of providing Petrogen with immediate proven developed revenue stream potential and undeveloped reserve... more

Roc Oil Company Limited (ROC) is engaged in oil and gas exploration, development and production. During the year ended December 31, 2007, the Company undertook and was involved in a number exploration, development and production operation activities. In particular, Chinese Government... more

Bois d'Arc Energy is an independent company focused on oil and natural gas exploration and production on the Gulf of Mexico shelf. The company concentrates on the Gulf of Mexico shelf because of its vast areas of undiscovered reserves and because major oil companies have moved on to... more

Chaparral Energy, Inc. (Chaparral) is an independent oil and natural gas company engaged in the production, acquisition and exploitation of oil and natural gas properties. Its areas of operation include the Mid-Continent, Permian Basin, Gulf Coast, Ark-La-Tex, North Texas and the Rocky... more

Canadian 88 Energy Corp. (EEE) is an independent public oil and gas company with its head office in Calgary, Alberta, Canada. The shares of Canadian 88 Energy Corp. are traded on the Toronto and American Stock Exchanges.

Nelson Resources Limited (TSX:NLG) is a leading independent exploration and development company operating in Kazakhstan. Kazakhstan is the Caspian Region's major oil and gas producer with a production level in 2004 of 432 million barrels (or 59 mln tons), and with the recoverable... more

Solana Resources Limited (Solano) is an international resource company engaged in the acquisition, exploration, development and production of oil and natural gas. The Company’s oil and gas properties are located in Columbia, South America, are held through its wholly owned subsidiary,... more

PanCanadian (TSE:PCE; NYSE:PCX) is a North American energy company active in the exploration, development, production and marketing of natural gas, crude oil, natural gas liquids and electricity. PanCanadian's core areas include the Western Basin, encompassing interests in Western Canada... more

PGE utilizes technology such as seismic testing to identify oil and gas reserves. Vibration trucks send shock waves into the ground, as shown above. A recording truck is then used to capture their return to the surface, gathering information about geologic conditions. Pennsylvania... more

BASA Resources Inc. is a private corporation founded in early 1989 by Michael N. Foster, Jr. and Lary D. Knowlton. The Dallas based company, with monthly production of approximately 336,000 BOE, ranks as the 23rd largest private producer of liquid hydrocarbons in the United states and... more

Ward Williston is one of the oldest and most prestigious oil companies in North Dakota. Founded in 1952, we are a midsize independent oil company with professional expertise in drilling, production, service and technology with operations in the Williston Basin. We have over 55 years of... more