高邮凹陷“双因素互补法”断层封闭性研究及应用

Research and application of fault sealing properties by the double-factor complementary method in Gaoyou Sag

通过高邮凹陷断层封闭性影响因素的主次关系、互补关系分析,认为对置盘砂岩百分含量、断层断距及断层活动期是断层封闭性的主控因素,提出了高邮凹陷存在两组双因素互补组合,即断距大小与砂岩百分含量之间的互补组合、断层活动期与砂岩百分含量之间的互补组合。在此基础上,分别分析了两组双因素互补组合与断层封闭性的关系,建立了"双因素互补法"断层封闭性评价方法和标准,在勘探实践中得到了较好的应用。

Through the analysis of the major and minor roles and complementary roles among the fault sealing influence factors in Gaoyou sag, it is confirmed that the sand contents, the fault throw and the fault activity stage are the controlling factors, and it is proposed that there are two double factors complementary group in Gaoyou sag. One group is the fault throw and the sand contents, another group is the fault activity stage and the sand contents. Based on the above, the evalua- tion criterion of the fault sealing properties by double factors complementary method is built through the analysis of the re- lation between two double factors complementary groups and the fault sealing. The evaluation criterion is applied and ac- quired better effect in Gaoyou sag.