利用模糊综合评价法进行断层封闭性预测

断裂带对油气成藏和分布起着至关重要的作用.它不仅可以作为油气聚集过程的遮挡物形成油气藏,而且可以作为连接烃源岩与圈闭之间的纽带和桥梁,但同时又可以对早期形成的油气藏起到破坏作用.因此,断裂在油气成藏中的作用主要取决于断层的封闭性.利用模糊综合评价法对琼东南盆地2号断裂带的乐东段、陵水段和松南-宝岛段进行了断层封闭性的综...

Prediction of fault sealing using fuzzy comprehensive evaluation method

Fault zone plays a vital role for hydrocarbon accumulation and distribution.It not only can act as barrier to form oil and gas reservoir during the process of hydrocarbon accumulation,but also can connect source rocks and traps as a bridge.At the same time,it can destroy the oil and gas reservoir formed at early stage.So the fault role in oil and gas accumulation depends on fault sealing.This paper comprehensively evaluated the fault sealing of No.2 Fault Zone（Ledong,Lingshui and Songnan-Baodao Members） in Qiongdongnan Basin by using the fuzzy comprehensive evaluation method.The results show that the fault sealing of Ledong and Lingshui Members is medium,but the Songnan-Baodao Member is poor;there is little difference in fault sealing between the hanging wall and the foot wall of fault in Ledong Member,and the other layers have good sealing apart from the first member of Lingshui Formation;the sealing of the hanging wall and the foot wall of fault in Lingshui Member is medium;there are great changes in fault sealing between Songnan and Baodao Members.The fault sealing of Lingshui Formation is poor and the fault sealing of lower member of Sanya Formation is good.