确定储层物性下限的方法很多,但是确定的物性下限均为某一固定值.对于埋深变化较大的岩性油藏,存在较大的误差.以G油田P油层为例论述了应用常规方法确定物性下限存在的问题,并应用考虑埋深的试油法和经验统计法确定了G油田P油层的物性下限,其确定的动态物性下限更符合油田的实际情况,对于向斜油藏的成藏机理,以及后续的储层评价方式都具有值得思考的意义.%There are many methods of determining cut-off value of net pay , but the cut-off value of being determined is a fixed value for some oilfield, there is much uncertainty for the lithologic reservoir that is changed greatly of depth.As an example, the problem of determining cut-off value of the P reservoir in G oilfield with routine method is discussed, the method of test oil and experience statistics for buried depth is used to determine the cut-off value of the P reservoir in G oilfield, It is in line with the actual situation of oil field that the cut-off value is decrease in pace of increasing depth.
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