【摘要】 利用数值盆地模拟方法 ,应用部分井内实测的地层压力作为标定 ,模拟计算了沾化凹陷沙河街组地层压力及剩余压力的分布特征及演化过程。研究表明 :沾化凹陷的超压异常主要出现在沙三段下亚段和沙一段 ,主要分布于洼陷区及斜坡带 ,盆地边缘为常压。泥岩不平衡的压实作用、有机质生烃是该区异常高压形成的主要机制 ,断层的分布及其活动对异常高压也有重要的影响更多还原

【Abstract】 By numerical basin simulation method and taking the measured formation pressure data from several wells as calibration, the distribution features and evolution process of the formation pressure and the residual pressure of the Shahejie Formation in Zhanhua sag are calculated. The result shows that abnormal formation overpressure mainly exists in Es 1 and lower Es 3 and distributes at subsag and slope belt. Normal pressure exists in the basin margin. Unbalanced compaction of the mudstones and hydrocarbon generation of organic matters are the main factors of forming abnormal overpressure in this area. Distribution and activity of faults also have important influence over the abnormally high pressure.更多还原