Buffalo (oil field)
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| Buffalo (oil field) | |
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| Name | Buffalo Oil Field |
| Region | Powder River Basin |
| State | Wyoming |
| Country | United States |
| Coordinates | 44.35°N 106.74°W |
| Discovery | 1978 |
| Operator | ConocoPhillips |
| Oil type | Light crude |
| Api gravity | 38 |
| Recoverable oil bbl | 250000000 |
| Production bbl per day | 12000 |
Buffalo (oil field) is a conventional onshore oil field located near Buffalo, Wyoming in the northern Powder River Basin. Discovered in the late 20th century, the field contributed to regional hydrocarbon output alongside projects in the Bighorn Basin, Green River Formation, and Williston Basin. Operators have included major energy companies such as ConocoPhillips, ExxonMobil, and mid‑size firms like EOG Resources and Pioneer Natural Resources over successive phases.
Overview
The Buffalo field sits within the broad sedimentary province of the Powder River Basin near the Big Horn Mountains and west of the Black Hills. Initial appraisal tied the discovery to exploration trends following finds in the Wind River Basin and lease plays around Thermopolis. Development has been influenced by regulatory regimes from the Wyoming Oil and Gas Conservation Commission and federal policies under the U.S. Department of the Interior and the Bureau of Land Management. Investment cycles mirrored oil price movements on the New York Mercantile Exchange and policy shifts during the administrations of Ronald Reagan, Bill Clinton, and George W. Bush.
Geological setting and reserves
Buffalo is hosted in Paleogene and Cretaceous clastic sequences comparable to reservoirs in the Fort Union Formation and the Mesaverde Group. Main reservoir horizons include stacked sandstones analogous to units productive in the Dakota Formation and the Mancos Shale trend. Structural trapping is controlled by subtle anticlines and faulting associated with Laramide deformation that also affected the Bighorn Basin and Heart Mountain area. Estimated original oil in place was revised by reservoir studies from Schlumberger and Halliburton petrophysical analysis, with recoverable reserves updated using Enhanced Oil Recovery techniques modeled after pilots in the Permian Basin and Eagle Ford Shale.
Development and production history
Exploration wells drilled by firms such as Amoco Corporation and Chevron in the 1970s and 1980s led to delineation wells and initial production. Expansion phases paralleled infrastructure investments by Halliburton and drilling activity by contractors like Nabors Industries. Production peaked during the 1990s, when secondary recovery using waterflood programs—guided by engineers who had worked on projects in the Williston Basin—boosted output. In the 2000s, operators evaluated hydrogen sulfide mitigation influenced by experience from the Anadarko Basin and employed horizontal drilling techniques refined in the Niobrara Formation.
Infrastructure and operations
Surface facilities include central processing plants, oil batteries, and truck and pipeline delivery points tying into regional crude corridors to refineries in Billings, Montana, Cushing, Oklahoma, and the Gulf Coast. Midstream partners have included Kinder Morgan, Oneok, and Plains All American Pipeline. Service companies such as Schlumberger, Baker Hughes, and Weatherford International provided completions and well services. Operations coordinated with railheads on the BNSF Railway and transload terminals serving markets connected to the Missouri River freight network.
Environmental and safety issues
Environmental oversight involved the Wyoming Department of Environmental Quality and federal agencies including the Environmental Protection Agency. Concerns encompassed produced water management, methane emissions monitored under EPA Greenhouse Gas Reporting Program protocols, and potential impacts to species under the Endangered Species Act and riparian zones draining to the Tongue River. Operators implemented spill response plans consistent with the Oil Pollution Act of 1990 and conducted baseline studies modeled after assessments used in the Alaska North Slope and Gulf of Mexico programs. Safety practices referenced standards from the Occupational Safety and Health Administration and industry initiatives promoted by the American Petroleum Institute.
Economic and regional impact
The field generated royalties and tax revenues administered through the Wyoming State Treasurer and boosted employment via contractors from companies such as Helmerich & Payne and Transocean for hookup and service work. Local economies in Johnson County, Wyoming and the city of Buffalo, Wyoming saw growth in housing, retail, and service sectors, interacting with the regional tourism economy tied to the Bighorn National Forest and cultural institutions such as the Jim Gatchell Memorial Museum. Impacts also intersected with grazing allotments administered by the U.S. Forest Service and transportation planning by the Wyoming Department of Transportation.
Future prospects and decommissioning planning
Prospects include continued infill drilling, application of tertiary recovery methods informed by pilots in the Permian Basin and carbon capture initiatives linked to proposals under the 45Q tax credit. Operators have coordinated decommissioning and reclamation plans with the Bureau of Land Management and the Wyoming Oil and Gas Conservation Commission, using precedents from closures in the San Juan Basin and remediation standards promoted by the Natural Resources Conservation Service. Long‑term monitoring aims to address groundwater protections under protocols similar to those developed for the Ogallala Aquifer and to satisfy closure bonding requirements overseen by the Wyoming State Engineer's Office.
Category:Oil fields in Wyoming Category:Powder River Basin