Able Energy, Inc. 
Holding company whose subsidiaries provide retail distribution and the provision of services relating to, fuel oil, propane gas and natural gas. (Nasdaq: ABLE).
Alberta Energy Company Ltd. 
Explores for, develops, produces, and markets oil and natural gas. A profile of the business, including employment, investor, and stock information. (NYSE: AOG)
Amerada Hess Corporation 
Exploration, production, refining, and retail sales. In 2001 operated 1115 net wells in US, Gabon, Indonesia, North Sea and Thailand.
Apache Energy 
Owns and manages 950 wells in south and central Texas. Assistance in buying and selling leases and water rights in that area. Sells/leases a variety of field equipment including trucks, pump jacks, casing, and drilling rigs.
BG Group 
Integrated natural gas company, including exploration, production, storage, transportation and distribution.
Blue Dolphin Energy Company 
Develops and operates oil and gas properties, transport processes, and storage for imported crude oil and refined products. (Nasdaq: BDCO).
BP Amoco Ltd. 
Major provider of energy from oil, gas and solar power. Produce petrochemicals for plastics, fibers and fabrics
CEF 
Republic of South Africa holding company. Operates producing facilities and gas-to-liquids plant. Retail sales. Awards exploration concessions. Stores crude oil.
ConocoPhillips 
Third largest integrated energy company in the U.S. and the fifth largest refiner in the world.
Coral Energy 
Provides a portfolio of energy-related products and services associated with wholesale natural gas and power marketing and trading.
El Paso Corporation 
Operations from wellhead to the trading floor. Oil and gas production, and pipelines.
ExxonMobil 
Petroleum manufacturer. Includes news and product and service information. [NYSE: XOM]
Husky Energy Inc. 
Western Canada oil and gas production. Heavy Oil production. Exploration offshore, eastern Canada. Also operates pipelines, refineries and retail stores.
Imperial Oil 
Exploration, production, refining and retail sales. Operates primarily in Canada. Involved in Cold Lake oil sands project.
Marathon Oil Company 
Operates in 18 states and many foreign areas. An integrated company including transportation, refining and product sales.
OMV Oil 
Vertically integrated organization operating in central and eastern Europe. Carries on international exploration and production activities outside this core region. Based in Austria.
Optima Oil & Gas Company 
Focused on exploitation and exploration projects with long-lived Mid-Continent gas reserves.
Petrobras 
Brazilian oil producer with refineries, production and exploration areas, pipelines, and terminals. Includes a classroom to learn more about the industry.
PetroChina 
Large integrated company operating in China. Exploration and production, refining, petrochemicals and retail marketing. Transmission and sales of natural gas.
Rompetrol 
Vertically integrated company operating in Romania. Also a oilfield service company managing projects internationally.
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