泌阳凹陷地层压力成因机制与预测方法

为研究泌阳凹陷地层压力的成因机制，利用地层压力信息寻找油气藏的分布,评价岩性油气藏含油气性，从沉积、油气形成与构造作用等方面分析了研究区地层压力的形成机理。利用单井的测井信息与高精度三维地震的速度信息，在精细的合成记录标定的基础上，通过地震波形指示反演的方法，获得高精度的地层层速度信息；应用Fillippone 法将获得的层速度数据体转化为地层压力数据体；利用高精度三维地震资料解释的层位数据，制作目的层段地层压力的地层体切片，实现地层压力的定量预测，预测结果与实测地层压力的误差小于3%。预测目的层段的异常压力分布区与岩性油气藏的富含油气性相关性较好，有效地评价了岩性圈闭的含油气性。该方法在研究区具有较好的适应性，对其他地区的地层压力预测有一定的借鉴作用。

Formation Pressure Genesis Mechanism and Prediction in Biyang Depression

In order to study the genesis mechanism of formation pressure and discover the hydrocarbon reservoir through formation pressure data and evaluate the hydrocarbon-bearing properties of lithologic reservoirs,the formation pressure genesis mechanism was analyzed from sedimentation,hydrocarbon generation and tectonism.Based on the fine synthetic recording calibration,the single-well logging data and high-resolution 3D seismic velocity data were used to gain the high-resolution horizon velocity information through seismic waveform indication inversion.The horizon velocity data volume was converted to formation pressure data volume by using the Fillippone method.The horizon data from the high-resolution 3D seismic interpretation was used to prepare the stratum slice and realize the quantitative prediction of formation pressure.The error between the prediction and measured formation pressure is less than 3%.There is a better correlation between the abnormal pressure zone and hydrocarbon-bearing properties of lithologic reservoir,which effectively evaluate the hydrocarbon-bearing properties of lithologic traps.This method shows a favorable applicability in this area,which could provide certain reference for formation pressure prediction in other areas.