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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。
Seismic data cover a wide range of vertical and horizontal global features of pressure distribution when predicting pressure. Predict the pressure before drilling has its unique advantages. The seismic method is used to predict the formation pressure. The theoretical basis is mainly for the formation with abnormal overpressure, and the porosity is generally larger than that of the normal pressure strata, so the layer velocity will decrease. Similarly, for abnormal low pressure strata, the layer velocity will increase. This paper mainly aims at predicting the formation pressure based on the relationship between pressure and velocity obtained in M region.