【摘要】 预测异常地层压力的方法主要有以测井资料为主的平衡深度法、以地震资料为主的地震层速度法、以实测压力为主的经验关系法和数值模拟法,单独使用某一类方法预测地层压力都具有一定的局限性。提出了一种综合预测地层压力的方法,该方法将现有的测井、地震资料预测地层压力的方法进行了综合与改进,预测过程充分利用了营尔凹陷的测井资料、地震资料和压力测试资料,预测的地层压力与实测压力具有较好的一致性,证明用该方法来研究异常地层压力是有效的。研究发现营尔凹陷异常地层压力十分发育,纵向上,从浅至深可以依次划分为具有不同压力特征的4个压力带:常压带、浅层超压带、压力过渡带和深层超压带。通过测井、地震资料预测压力剖面的综合对比发现,各压力带的分布主要受地层层位和岩性控制。更多还原

【Abstract】 Approaches for abnormal formation pressure prediction can be classified into three categories.However,some limitations in predicting the formation pressure will be found if just one method is used alone.This paper develops a new integrated approach to forecast the abnormal formation pressure.This approach has integrated and improved the present prediction methods based on the well logging data and the seismic data.In the prediction processes,it takes the sufficient use of the log,seismic as well as measured pressure data of the study area,and so the prediction result corresponds to the actual pressure.This proves the effectiveness of this method.According to the research in Ying’er Sag,four pressure zones can be divided vertically: normal pressure zone,shallow overpressure zone,intermediate zone and deep overpressure zone.The comparison of different calculated pressure by log data and seismic impedance leads to the conclusion that the distribution of different pressure zones is controlled mainly by formation position and lithological characters.更多还原