دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the pressure at which a gas injected into a reservoir vaporises hydrocarbons from crude oil to form a miscible transition zone between the gas and the crude oil. This liquid transition zone moves reservoir oil toward production wells. Miscibility pressure depends on the characteristics of the gas and the temperature and gravity of the reservoir crude oil. For carbon dioxide, hydrocarbon vaporisation begins at pressures between 1,000 pounds per square inch and 2,000 pounds per square inch at temperatures below 200�F with oils above 30. API. Several hundred additional points per square inch are required to reach the optimum miscibility pressure, at which sufficient hydrocarbons are vaporised to produce a profitable amount of oil.