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Dos Bocas refinery
The Dos Bocas refinery, formally the Olmeca refinery (Refinería Olmeca de Dos Bocas), is a Mexican petroleum refinery operated by Pemex at the port of Dos Bocas, Tabasco.
Downstream (petroleum industry)
Downstream, also known as the downstream oil industry, is the petroleum industry term for refining crude oil into fuels and marketing them, contrasted with upstream production.
Draugen Oil and Gas Field
Draugen is an oil field in the Norwegian Sea off Norway, discovered in 1984 and the first Norwegian field north of the 62nd parallel, producing since 1993.
Drill stem test
A drill stem test (DST) is a well test that isolates a formation with packers so its pressure, fluids, and productivity can be measured before a well is completed.
Drilling fluid
Drilling fluid, also called drilling mud, is the circulating fluid used in rotary drilling of wells to clean the hole, carry cuttings to the surface, and counterbalance formation pressure.
Drilling rig
A drilling rig, or drill rig, is the machine used to drill a wellbore for oil, gas, or geothermal resources, combining hoisting, rotating, and circulating systems on land or offshore.
Drilling riser
A drilling riser is the large-diameter pipe connecting a floating drilling vessel to the subsea blowout preventer on the seafloor, returning drilling mud to the surface.
Drillship
A drillship is a maritime vessel modified with a drilling rig and station-keeping equipment, held on location by anchors, thrusters, or both, for drilling in deep water.
Druzhnoye Oil and Gas Field
Druzhnoye (Дружное) field is an oil field in the Surgut district of West Siberia, Russia, discovered in 1983 and developed since 1985 by LUKOIL-Western Siberia.
Dual gradient drilling
Dual gradient drilling (DGD) is an offshore technique, part of managed pressure drilling, that maintains two pressure gradients so wellbore pressure matches formation limits better.
Dubai Crude
Dubai Crude is a medium sour crude oil produced in Dubai whose Platts price assessment is the main benchmark for pricing Middle East Gulf crude exported to Asia.
Dukhan field
The Dukhan field is Qatar's first and only onshore oil and gas field, on the western side of the Qatar peninsula about 80 km west of Doha. Discovered in 1939, it is operated by QatarEnergy.
Dunga Oil Field
The Dunga oil field (Дунга) is an onshore oil and gas field in western Kazakhstan about 50 km north of Aktau, discovered in 1966 and producing commercially since 2000.
Duri Oil Field
The Duri Oil Field is a heavy-oil field in Riau Province, central Sumatra, Indonesia, producing since 1958 and the site of the world's largest steamflood operation.
Eagle Ford
The Eagle Ford is a Late Cretaceous shale formation in South Texas, developed since 2008 as one of the largest United States tight oil and shale gas plays.
East Baghdad Oil Field
The East Baghdad Oil Field is a giant onshore oil field about 10 kilometers east of Baghdad, Iraq, discovered in 1974 with roughly 8 billion barrels of proven reserves.
East Texas Oil Field
The East Texas Oil Field, discovered by the Daisy Bradford No. 3 well in 1930, is the largest oil reservoir in the contiguous United States, producing nearly 5.2 billion barrels from northeast Texas.
Eden Yuturi Oil and Gas Field
Eden Yuturi (Campo Edén Yuturi) is an oil field in the Ecuadorian Amazon, operated by the state company EP Petroecuador in Block 12 and producing about 29,000 barrels per day.
Edop Oil and Gas Field
Edop is an offshore oil and gas field in Nigeria's Niger Delta, discovered by Mobil in 1981 and operated by ExxonMobil within OML 67 off Akwa Ibom State.
Edvard Grieg Oil and Gas Field
Edvard Grieg is an oil and gas field in the central North Sea on the Utsira High, about 180 km west of Stavanger, producing since 2015.
Egina Oil Field
Egina is a deepwater oil field in the Gulf of Guinea offshore Nigeria, discovered in 2003 and producing since 2018 at up to 208,000 barrels per day.
Ekofisk
Ekofisk is an oil and gas field in the southern Norwegian sector of the North Sea, discovered in 1969 and producing since 1971 as Norway's first production field.
El Carito Oil Field
El Carito Oil Field is a giant oil field in northern Monagas State, northeastern Venezuela, discovered in 1987 as part of the Furrial Trend and operated by PDVSA.
El Dorado refinery
El Dorado refinery is the name of two American petroleum refineries: an HF Sinclair refinery in El Dorado, Kansas, and a Delek US refinery in El Dorado, Arkansas.
El Feel Oil and Gas Field
El Feel Oil and Gas Field, also called the Elephant field, is an onshore oil field in Libya's Murzuq Basin, discovered in 1997 and operated by Mellitah Oil & Gas.
El Furrial Oil Field
El Furrial Oil Field is a giant onshore oil field in Monagas state, eastern Venezuela, discovered in 1986 and producing medium-gravity crude from a deep Oligocene sandstone.
El Huemul Oil and Gas Field
El Huemul is an oil and gas field in the Golfo San Jorge Basin, Santa Cruz, Argentina, near Las Heras, operated by CGC since 2021.
El Merk Oil and Gas Field
El Merk is an oil and gas condensate field in Block 208 of Algeria's Berkine basin, operated by Groupement Berkine, with first oil in March 2013 and a designed peak of about 160,000 barrels per day.
El Sharara Oil Field
El Sharara (حقل الشرارة) is Libya's largest oil field, in the Murzuq Basin about 800 km south of Tripoli, operated by Akakus Oil Operations and producing light crude since December 1996.
Eldfisk
Eldfisk is an oil field in the southern Norwegian sector of the North Sea, discovered in 1970 and producing since 1979, operated by ConocoPhillips as part of the Greater Ekofisk Area.