用模糊综合评判方法研究断层封闭性——以高邮凹陷陈堡地区为例

运用模糊综合评判方法,并结合泥岩涂抹系数法对高邮凹陷陈堡地区的断层封闭性进行了定量评价,分析结果与实际勘探状况相吻合。研究表明,吴1、吴2等主控断层在不同位置的封闭性存在很大的差异,具有“下开上闭”特征,表现为断层在深部位开启,成为油气运移的主要通道;在浅部闭合,从而有效地封闭油气。小断层封闭性较好，在局部形成断层遮挡油气藏。

Study on Fault Sealing with Synthetic Fuzzy Judgment--An example of Chenbao area in Gaoyou sag

A quantitative evaluation of the fault sealing of Chenbao area in Gaoyou sag is made by applying synthetic fuzzy judgment integrated with shale smear factor method. The results are in accordance with actual situations from exploration. Study shows that great differences of fault sealing in different positions occur for such major faults as Wu-1 and Wu-2, with characteristic of deep opening and shallow closing, becoming the main passages for hydrocarbon migration and effective sealing for hydrocarbon fugitive emission. For the minor faults, they tend to forming fault-sealed reservoirs in it due to their good sealing properties.