利用地震层速度预测地层压力

地震资料覆盖范围广,在预测压力时可以得到压力分布的纵向和横向的全局特征。在钻前压力预测方面有其独特优势。利用地震方法预测地层压力,其理论依据主要是对于存在异常超压的地层,相比正常压力的地层,其孔隙度一般较大,因此层速度会减小。同理,对于异常低压地层,其层速度会增大。本文主要是针对M地区得到的压力与速度的关系来预测地层压力。

Applying Seismic Velocity to Predicting Formation Pressure

Because of the wide range of seismic data,the whole feature of the vertical and lateral distribution can be obtained when predicating pressure.So it has its unique advantage in pre-drill prediction.The main principle of applying seismic method to predict formation pressure is based on the abnormal pressure formation,relatively normal formation pressure.Its porosity is a little bigger and then its velocity is slower.For the same reason,to the anomalously low pressure formation,the velocity is bigger.The purp...