济阳坳陷车西洼陷异常高压与储层孔隙度的关系  

RELATIONSHIP BETWEEN ABNORMAL HIGH PRESSURE AND RESERVOIR POROSITY IN CHEXI SAG OF JIYANG DEPRESSION

作　　者：侯树杰[1,2,3] 袁亚娟[1,3] 万志峰[4] 施秋华[1,3] 刘见宝[1,3] 郭峰[1,3] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640 [2]中石化胜利油田分公司,山东东营257000 [3]中国科学院研究生院,北京100049 [4]中山大学海洋学院,广州510275

出　　处：《海洋地质动态》2010年第5期1-7,共7页Marine Geology Letters

基　　金：国家科技重大专项(编号:2008ZX05025-005-02);国家"973"项目(编号:2008CB219401)

摘　　要：根据研究区测井、测试、岩石物性等资料,讨论分析了异常高压与储层孔隙度的关系。车西洼陷沙河街组沙三段与沙四上亚段地层中存在异常地层压力,主要分布于深洼带和斜坡前缘。异常高压带地层压力与孔隙度有良好的相关性,主要表现在以下几个方面:异常高压使得储集空间得以保存;通过促进溶解作用而形成大量次生孔隙;异常高压作用下形成微裂缝,极大地改善了地层储集性能。根据异常压力与孔隙度的相关性,预测了车西洼陷沙四上亚段的孔隙度特征。Based on the data of well-logging,test results,petrophysics and other information,the paper discusses and analyzes the relationship between abnormal high pressure and reservoir porosity in the study area.There is abnormal pressure in Es3 and Es4 sub-member strata in Chexi sag which distributed in the deep sub sag belts and front of slope.Good correlation between pressure and reservoir porosity in abnormal high pressure zones is mainly shown in the following aspects：（1） Abnormal high pressure makes reservoir space preserved;（2） A large amount of secondary pores are formed by accelerating dissolution;（3） The micro-cracks formed by the effect of abnormal overpressure significantly improve reservoir property of the strata.We also predict the characteristics of reservoir porosity of Es4 in Chexi sag according to the correlation between pressure and reservoir porosity.

关 键 词：异常高压 孔隙度 车西洼陷 济阳坳陷 

分 类 号：TE122.23[石油与天然气工程—油气勘探]