دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the temperature and pressure at which part of a liquid begins to convert to gas. For example, if a certain volume of liquid is held at constant pressure, but its temperature is increased, a point is reached when bubbles of gas be- gin to form in the liquid. That is the bubble point. Similarly, if a certain volume of liquid is held at a constant temperature but the pressure is reduced, the point at which gas begins to form is the bubble point. Compare dew point. 2. the temperature and pressure at which gas, held in solution in crude oil, breaks out of solution as free gas.

the pressure at which gas begins to break out of an under saturated oil and form a free gas phase in the matrix or a gas cap.

n: the temperature and pressure at which a liquid begins to condense out of a gas. For example, if a constant pressure is held on a certain volume of gas but the temperature is reduced, a point is reached at which droplets of liquid condense out of the gas. That point is the dew point of the gas at that pressure. Similarly, if a constant temperature is maintained on a volume of gas but the pressure is increased, the point at which liquid begins to condense out is the dew point at that temperature. Compare bubble point.

the temperature at which liquids begin to condense from the vapor phase in a gas stream. (see also bubble point).

n: a free-gas phase overlying an oil zone and occurring within the same producing formation as the oil. See associated gas, reservoir.

n: the free gas phase that is sometimes found overlying an oil zone and occurs within the same formation as the oil.

a zone of free gas above an oil deposit. The gas cap occurs where the oil is oversaturated with gas (past the solubility limit). When a gas cap is not present at discovery, the oil is above the bubble point.

saturation pressure or bubble point pressure.

J or PI. A measure of a well’s ability to flow. Applies above the bubble point.

pressure at which vapor and liquid are in equilibrium. For oils, equal to the bubble point. For condensates, the dew point.

n: see bubble point.