Gas cap drive is relatively efficient, producing an average of 35% of the oil in place.
气顶驱是相对较为有效的一种驱油机理，平均可采出原油地质储量的35%。
There are large number of oil fields developed under gas cap drive in operation currently, however, much less studies on the reservoir behavior of such oil fields have been carried.
气顶油藏的开发在油田开发中占有很大的比例，然而利用油藏工程方法研究气顶油藏的开采动态要比油藏开发少得多。
There are large number of oil fields developed under gas cap drive in operation currently, however, much less studies on the reservoir behavior of such oil fields have been carried.
气顶油藏的开发在油田开发中占有很大的比例，然而利用油藏工程方法研究气顶油藏的开采动态要比油藏开发少得多。
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