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Oil and Gas Companies
The Upstream companies searches for potential underground or underwater crude oil and natural gas fields, drilling of exploratory wells, and subsequently drilling and operating the wells that recover and bring the crude oil and/or raw natural gas to the surface. The upstream oil sector is also commonly known as the exploration and production (E&P) sector.
The Midstream Companies involves the transportation (by pipeline, rail, barge, or truck), storage, and wholesale marketing of crude or refined petroleum products. The midstream operations are often taken to include some elements of the upstream and downstream sectors.
The Downstream Companies commonly refers to the refining of petroleum crude oil and the processing and purifying of raw natural gas, as well as the marketing and distribution of products derived from crude oil and natural gas. The downstream sector touches consumers through products such as gasoline or petrol, kerosene, jet fuel, diesel oil, heating oil, fuel oils, lubricants, waxes, asphalt, natural gas, and LPG as well as hundreds of petrochemicals.
Independent Oil and Gas Companies are non-integrated companies which receives nearly all of its revenues from production at the wellhead. They are exclusively in the exploration and production segment of the industry, with no downstream marketing or refining within their operations.
Integrated Oil & Gas Companies engages in the exploration, production, refinement and distribution of oil and gas. Typically, integrated companies divide their various operations into categories: upstream, which includes all exploration and production endeavors, and downstream, which is confined to refinement and marketing activities.
Biggest Oil Companies in World
(In Order)
Saudi Aramco
Gazprom
National Iranian Oil Co.
ExxonMobil
PetroChina
BP
Royal Dutch Shell
Pemex
Chevron
Kuwait Petroleum Corp.
11. Abu Dhabi National Oil Co12. Sonatrach13. Total14. Petrobras15. Rosneft16. Iraqi Oil Ministry17. Qatar Petroleum18. Lukoil19. Eni20. Statoil
Upstream Oil & Gas Companies
Saudi Aramco (Saudi Arabia)
NIOC (Iran)
PDVSA (Venenzuela)
Petrochina (China)
Gazprom (Russia)
Petrobras (Brazil)
Petronas (Malaysia)
CNPC (Asia)
Downstream Oil & Gas Companies
Exxon Mobil (North America)
PDVSA (Latin America)
Shell (Western Europe)
Tatneft (Eastern Europe)
ADNOC (Middle East)
Sinopec (Asia)
Puma Energy (Africa)
Midstream Oil & Gas Companies
Kinder Morgan Energy Partners
Plains All American Pipeline
Enterprise Products Partners
Enbridge Inc.
Spectra Energy
Energy Transfer Partners
Targa Resources
Williams Partners
Fully Integrated Oil and Gas Companies
Chevron (North America)
Petrobras (Latin America)
Statoil (Western Europe)
Gazprom (Eastern Europe)
Petrixo Group (Middle East)
PTT (Asia)
PetroSA (Africa)
Independent Oil and Gas Companies
Breitling Oil and Gas (North America)
HRT Oil & Gas (Latin America)
Puma Energy (Western Europe)
Irkutsk Oil Company (Eastern Europe)
Crescent Petroleum (Middle East)
Phoenix Petroleum Philippines (Asia)
Afren (Africa)
Top 10 Oil and Gas Companies in India
Indian Oil Corporation
ONGC
Bharat Petroleum
Reliance Petroleum Limited
Essar Oil Limited
Cairn India
Gas Authority of India
Hindustan Petroleum Corporation
Oil India Ltd
Tata Petodyne
Other Verticals in Oil & Gas Industry
Consultancy
Contractor Compliance
Drilling & Well Services
Engineering
Environmental & Safety
Equipment Repair
Exploration & Production
Transportation
Fabrication & Construction
Manufacturers & Suppliers
Other Support Services
Personnel
Pipeline
Professional Services
Rental
Software
For Full list of Oil and Gas related Companies : http://www.rigzone.com/search/c/companies/
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