确定含油气面积存在的问题及正确的方法

PROBLEMS IN DETERMINING OIL/GAS-BEARING AREA AND ITS CORRECT METHODS

本文对传统的石油地质理论定义的含油气面积提出了异议,用倒转背斜油气藏、断层下盘油气藏和不整合面下油气藏的实例阐明在传统定义下确定含油气面积存在的问题,指出用这种方法确定的含油气面积小于实际面积。笔者将含油气面积定义为含油气体在水平面上的投影区域,并推荐了三种正确的确定方法。

The definition of oil/gas-bearing area given in traditional petroleum geology theory was taken objection against in this paper. The problem exists especially in the reservoirs of overturned fold,and of fault footwall,and in the reservoir under unconformity surface. The oil/gas-bearing areas deterMined by traditional methods are smaller than the actual areas. The size of the reduced area depends on the attitudes of overturned limb of fold or fault or unconformity surface, the thickness of the reservoir bed and its attitude. A mote logical definition is given in this paper. The oil/gas-bearing area should be the projected area of oil/gas-bearing body on the horizontal plane. Three correct methods of determining the area are recommended here.