驾掌寺地区地层压力预测研究

The formation pressure prediction in Jiazhangsi area

1. 中国地质大学,湖北武汉 430074;2. 中国石化石油勘探开发研究院南京石油物探研究所,江苏南京 210014

China University of Geosciences, Wuhan 430074, China

驾掌寺地区地层压力分布复杂,为了提高该地区压力预测的精度,提出了将测井资料和地震资料联合起来进行预测的方法.即首先利用测井和压力测试资料建立单井压力模型;然后利用单井压力模型指导地层压力预测的速度分析;最后用获得的高精度速度值预测地层压力。利用该方法对驾掌寺地区地层压力进行了预测.划分出了东西2个超压带和多个超压系统及超压子系统。对该地区地层压力分布特征的分析表明,西部斜坡与中东部的超压系统发育特征存在较大的差别,但整体上为中-低度超压,最大压力系数为1.6,压力系数主体在1.1～1.3。

The method to predict pressure under the present the pressure model from well is presented in this paper. Firstly the pressure model is created with log and formation pressure test, then velocity is analyzing with reference of well pressure model, at last the pressure is calculated with gained high precision velocity. With the method, both the east and the west overpressure zone are found in Jiazhang-si, which are very different respectively although. It is middle-low overpressure on the whole. The maximum pressure coefficient is 1. 65, but the major pressure coefficient is between 1. 1 and 1. 33. At the same time, multiple overpressure systems and sub-overpressure systems are found in the overpressure zones.