1,466 articles
Dammam development project
The Dammam development project is a two-phase Saudi Aramco crude oil project in Saudi Arabia adding 75 thousand barrels per day, phased onstream in 2025 and 2027.
Dampier Port
Dampier Port is a bulk export port on the Burrup Peninsula in Western Australia, built from 1965 to ship iron ore and now handling LNG and salt.
Dan Oil and Gas Field
Dan is an oil and gas field in the Danish North Sea, discovered in 1971 and onstream in 1972 as Denmark's first producing oil field.
Daniel Yergin
Daniel Yergin is an American energy historian and author who won the 1992 Pulitzer Prize for The Prize, a history of the oil industry, and chairs the CERAWeek energy conference.
Dansk Undergrunds Consortium
Dansk Undergrunds Consortium (DUC) is a joint venture producing most of Denmark's oil and natural gas from the Danish North Sea, formed in 1962 around A.P. Møller's sole concession.
Danube Refinery
The Danube Refinery (Dunai Finomító) is an oil refinery in Százhalombatta, Hungary, about 30 km south of Budapest, operated by MOL Group with a capacity of 8.1 million tonnes per year.
Daqing Field
Daqing Field (大庆油田) is a giant oil field in Heilongjiang Province, China, discovered in 1959; it is China's largest and a pioneer of polymer flooding and chemical enhanced oil recovery.
Darquain Oil Field
Darquain Oil Field, also known as Darkhovin, is a giant onshore oil field in Khuzestan province, southwestern Iran, holding an estimated 8 billion barrels of oil in place.
Darren Woods
Darren W. Woods is an American business executive who has been chairman and chief executive officer of ExxonMobil since January 1, 2017, succeeding Rex Tillerson.
Dayton H. Clewell
Dayton H. Clewell (1912–1992) was an American physicist who led petroleum research at Magnolia Petroleum and Mobil Oil, retiring as Mobil's senior vice-president for research and engineering.
Decline curve analysis
Decline curve analysis fits empirical decline models, chiefly the Arps equations, to a well's production rate history to forecast future output and estimate recoverable reserves, including in shale reservoirs.
Deepsea Bergen
Deepsea Bergen is a semi-submersible drilling rig operated by Odfjell Drilling on the Norwegian continental shelf, delivered in 2019 and renamed from Deepsea Bollsta in 2026.
Deepsea Stavanger
Deepsea Stavanger is a sixth-generation semi-submersible drilling rig owned and operated by Odfjell Drilling, delivered in 2010 by DSME in South Korea for deepwater, harsh-environment drilling.
Deepwater Horizon
Deepwater Horizon was an offshore drilling rig that exploded on April 20, 2010, in the Gulf of Mexico, killing 11 workers and spilling millions of barrels of oil.
DeGolyer & MacNaughton
DeGolyer & MacNaughton is an independent petroleum consulting firm founded in Dallas, Texas, in 1936 by Everette Lee DeGolyer and Lewis MacNaughton to estimate oil and gas reserves.
Dehloran Oil Field
The Dehloran Oil Field is an onshore oil field in Ilam Province, northwestern Iran, near the Iraqi border, discovered in 1972 with reserves of 550 million barrels.
Delayed coking
Delayed coking is a semi-batch thermal cracking process that converts vacuum residue into gases, naphtha, gas oils, and petroleum coke, accounting for 88% of world coking capacity.
Delek US
Delek US is an American diversified downstream energy company based in Brentwood, Tennessee, operating four refineries in Texas, Arkansas, and Louisiana with a combined capacity of 302,000 barrels per day.
Diamond Shamrock
Diamond Shamrock was an American oil refining and marketing company formed by the 1967 merger of Diamond Alkali and Shamrock Oil and Gas; Valero absorbed it in 2001.
Diezani Alison-Madueke
Diezani K. Alison-Madueke, born 1960, is a Nigerian politician who served as Minister of Petroleum Resources from 2010 to 2015, the first woman to hold the office.
DNO ASA
DNO ASA is a Norwegian oil and gas company founded in 1971, Norway's oldest oil company, with its flagship Tawke license in the Kurdistan region of Iraq.
DNOW Inc.
DNOW Inc. is a Houston-based distributor of pipe, valves, fittings, and energy and industrial equipment, spun off from National Oilwell Varco in 2014 and acquired MRC Global in 2025.
Donges Refinery
The Donges refinery is an oil refinery in Donges, western France, on the Loire estuary, owned and operated by TotalEnergies with a capacity of 219,000 barrels per day.
Doroud Oil and Gas Field
The Doroud Oil and Gas Field is Iran's largest offshore oil field, an anticline in the northern Persian Gulf partly underlying Kharg Island, discovered in 1961.
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.