دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. gas that is taken in succeeding years and has been paid for previously under a take-or-pay clause in a gas purchase contract The contract will normally specify the number of years after payment in which the purchaser can take delivery of make-up gas without paying a second time. 2. gas injected into a reservoir to maintain a constant reservoir pressure and thereby prevent retrograde condensation. 3. in gas processing, the gas that makes up for plant losses. During processing there is a reduction in gas volume because of fuel and shrinkage. Some agreements between gas transmission companies and plant owners require plant losses to be made up or to be paid for.

n: in reservoir mechanics, the formation of liquid droplets in a gas as the well is produced and the pressure drops. Some hydrocarbons exist naturally above their critical temperature in the reservoir;as a result, when pressure is decreased, instead of expanding to form a gas, they condense to form a liquid.