地震层速度在断层封堵性研究中的应用

APPLICATION OF SEISMIC INTERVAL VELOCITY IN STUDY OF FAULT-SEALING

曾涛 徐宏节 佘小宇 周凌方

Zeng Tao Xu Hongjie She Xiaoyu Zhou Lingfang

地震层速度与地层孔隙度、剩余孔隙度之间存在一定的函数关系。而剩余孔隙度又反映了地层的压实状态。运用这一关系可通过层速度预测断裂的封闭性。具体步骤为(1)用回归分析确立孔隙度与深度关系曲线;(2)根据剩余孔隙度,在区域上进行压实级别划分并判断断层的封闭性。这一方法在塔里木盆地轮台断裂附近进行了应用,取得了较好效果。

There is a certain functional relation between seismic interval velocity and formation porosity as well as residual porosity.The residual porosity indicates the compaction state of the formations. Hence the sealing capacity of faults can be predicted by seismic interval velocity. The followings are the procedure:(1)to determine relation curves of porosity changing with depth by regressive analysis;(2)to classify the compaction grade according to residual porosity and discriminate fault sealing.This method has been used in Luntai fault in Tarim Basin,and the result is satisfactory.

10.11743/ogg20000217