Petroleum exploration plays and resource estimates, 1989, onshore United States; Region 8, Eastern Interior; Region 9, Atlantic Coast

Abstract

Play. A group of geologically related known or undiscovered accumulations and (or) prospects having similar characteristics of hydrocarbon source, reservoir, trap and geologic history. Field. A single pool or multiple pools of hydrocarbons grouped on, or related to, a structural or stratigraphic feature. Prospect.-A geologic feature having the potential for trapping and accumulating hydrocarbons. Crude oil. A mixture of hydrocarbons present in underground reservoir rocks that is in a liquid state and remains in a liquid state as it is produced from wells. Associated gas .-Free natural gas, occurring as a gas cap, in contact with and above an oil accumulation within a reservoir. Dissolved gas.-Natural gas dissolved in crude oil within a reservoir. Nonassociated gas. (NA)-Natural gas that is neither associated with nor in contact with crude oil within a reservoir. Natural gas liquids (NGL).-Those portions of reservoir gas that are liquified at the surface in lease separators, field facilities, or gas processing plants. NGL is reported only in the tables of estimates in this report. MMBO.-Millions (10 6) of barrels of oil (standard stock tank barrels of crude oil, 42 gallons per barrel). ££O.»Billions (109) of barrels of oil. BCFG.~Billions (10 9) of cubic feet of gas (standard cubic feet of gas at 14.73 pounds per in2 and 60°F). Hydrocarbon gases only. TCFG.-Trillions (10^) of cubic feet of gas. Hydrocarbon gases only. MM£O£.-Millions of barrels of oil equivalent (conversion factor utilized is 6,000 ft3 of gas = 1 BOE).