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Vostochno-Perevalnoe Oil and Gas Field
Vostochno-Perevalnoe is a small, structurally simple oil and gas field in the Surgut district of West Siberia, Russia, discovered in 1990 and known for its water-gas injection pilots and on-site 28 MW power plant.
Vostochno-Surgutskoye field
Vostochno-Surgutskoye field (Восточно-Сургутское месторождение) is a large, complex oil field in Khanty-Mansi Autonomous Okrug, Western Siberia, discovered in 1977 and operated by RN-Yuganskneftegaz and Surgutneftegaz.
Vozeiskoye Oil Field
The Vozeiskoye oil field (Возейское) is a large oil field in the Usinsk district of the Komi Republic, Russia, discovered in 1971 with reserves of about 350 million tonnes, operated by LUKOIL-Komi.
Vyngayakhinskoye Oil and Gas Field
Vyngayakhinskoye Oil and Gas Field (Вынгаяхинское) is an onshore oil and gas field in the Purovsky area of Western Siberia, Russia, discovered in 1968, with production beginning in 1986.
W&T Offshore
W&T Offshore, Inc. is a Houston, Texas-based independent producer of oil, natural gas liquids, and natural gas, operating almost entirely offshore in the Gulf of Mexico.
Wafra Oil Field
The Wafra Oil Field is a giant onshore oil field in the Partitioned Zone between Kuwait and Saudi Arabia, discovered in 1953 with nearly 25 billion barrels.
Waha Oil and Gas Field
The Waha Oil and Gas Field is an onshore oil field in Libya's Sirte Basin, discovered in 1960 and producing since 1963; with Gialo, Dahra, and Defa it forms Libya's biggest producing area.
Waha Oil Company
Waha Oil Company (Arabic: شركة الواحة للنفط) is a Libyan oil and gas producer in Tripoli, a joint venture of Libya's NOC, ConocoPhillips, and TotalEnergies operating the Waha fields.
Water shut-off
Water shut-off is a set of petroleum-engineering treatments, mechanical or chemical, that reduce or stop unwanted water production from an oil or gas well, or divert injected water.
Water-alternating-gas injection
Water-alternating-gas (WAG) injection is an enhanced oil recovery method that injects water and gas into a reservoir in alternating slugs, displacing oil toward production wells and improving sweep efficiency.
Wax oil
Wax oil, known commercially as slack wax, is a semi-solid mixture of crystalline paraffin hydrocarbons and lubricating oil from solvent dewaxing, and the main feedstock for paraffin wax.
Weizhou 12-2 Oil and Gas Field
Weizhou 12-2 Oil and Gas Field (涠洲12-2) is a shallow-water offshore oil field in the Beibu Gulf off Guangxi, China, operated by CNOOC and producing since 2016.
Well completion
Well completion is the operations and permanent equipment that convert a drilled oil or gas well into a producing or injecting well, spanning tubing, perforating, and sand control.
Well kill
A well kill is the set of actions taken to kill a well and prevent a blowout, by circulating out the kick and replacing mud with kill-weight mud.
Well test (oil and gas)
A well test is a petroleum engineering procedure in which a well's flow rate and pressure are temporarily controlled and measured to evaluate reservoir properties, from exploration through field surveillance.
Well test analysis
Well test analysis, also called pressure transient analysis (PTA), interprets pressure and flow-rate measurements at a well to estimate reservoir properties such as permeability, skin factor, and pressure.
Wellbore stability analysis
Wellbore stability analysis is a geomechanical method predicting whether a drilled borehole stays intact, computing the safe mud weight window between collapse and lost circulation.
West Kingfish Oil and Gas Field
West Kingfish is an oil field in the Gippsland Basin off Victoria, Australia, developed from a platform by Esso and BHP between 1982 and 1984, now decommissioned.
West Tuna Oil and Gas Field
West Tuna is an oil and gas field in the Gippsland Basin of Bass Strait, off Victoria, Australia, now producing natural gas from the West Tuna platform.
West White Rose
West White Rose is an offshore oil development in the White Rose field on the Grand Banks off Newfoundland and Labrador, operated by Cenovus Energy.
Western Canada Select
Western Canada Select (WCS) is a heavy, sour crude oil blend produced in western Canada and the benchmark price for Canadian heavy crude, created in 2004 at Hardisty, Alberta.
Western Canadian Select
Western Canadian Select (WCS) is a blended heavy sour crude oil stream created in 2004 that serves as the benchmark price for Canadian heavy oil, priced at Hardisty, Alberta.
Weyburn Midale Oil Pool
The Weyburn Midale Oil Pool is a pair of large adjacent oil fields in southeastern Saskatchewan, Canada, discovered in 1953 and 1954 in Mississippian carbonate rocks.
White mineral oil
White mineral oil (liquid paraffin, food grade mineral oil, CAS 8012-95-1) is a highly refined, colorless mixture of saturated petroleum hydrocarbons used as a food additive, release agent, and pharmaceutical base, with viscosity-based grades and ADIs of 0.01–20 mg/kg bw per day.
White Rose Field
White Rose Field is an offshore oil field in the Jeanne d'Arc Basin on the Grand Banks of Newfoundland, discovered in 1984, with first oil in November 2005.
Whitecap Resources
Whitecap Resources is a Calgary-based Canadian oil and natural gas producer operating in Alberta, Saskatchewan, and British Columbia, ranked among Canada's largest after merging with Veren in May 2025.
Wildmere Oil and Gas Field
Wildmere is a designated heavy crude oil field in east central Alberta, about 200 kilometers southeast of Edmonton, known for waterflooding and an early electromagnetic heating trial.
William C. Maurer
William C. Maurer is an American drilling engineer who founded Maurer Engineering in Houston, helped build the first PDC drill bit, and holds 38 patents.
William Henry Silcox
William Henry Silcox (1922–2015) was an American offshore drilling engineer who led Chevron's offshore technology development and was elected to the National Academy of Engineering.
Wilmington Oil Field
The Wilmington Oil Field is a giant oil field beneath Long Beach and San Pedro Bay, California, discovered in 1932 and the third-largest in the United States by cumulative production.