异常高压对储层成岩作用的控制  

Govern of Abnormal Pressure on Reservoir Diagenesis

作　　者：刘迪[1] 丁晓琪[1,2] 韩玫梅[3] 

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610500 [3]西南石油大学资源与环境学院,四川成都610500

出　　处：《西南石油大学学报（自然科学版）》2013年第3期39-46,共8页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金项目(40972098);博士后科学基金(2012M511941)

摘　　要：以张家垛油田阜三段储层为例,在异常高压形成机理研究的基础上,利用铸体薄片、X衍射和扫描电镜,对异常高压储层的成岩作用进行研究。研究结果表明:(1)欠压实形成的高压可以抑制上覆地层的压实作用,使深埋储层的碎屑颗粒仍保持点—线接触,储层剩余原生粒间孔是主要储集空间;(2)欠压实形成的高压系统由于其相对封闭性.体系内外的物质交换相对缓慢,蒙脱石的伊利石化将受到抑制;(3)高压的封闭系统可以抑制石英的次生加大和铁方解石的沉淀。因此,压力系数与储层储集物性具有较好的相关性,可以通过岩石学特征和异常压力研究来预测深部优质储层的分布规律。Taking the Fu 3 interval reservoir in Zhangjiaduo Oilfield as an example, based on mechanism research of abnormal pressure, we study the impacts of overpressure on diagenesis with the cast thin section, XRD and SEM. Results of this study demonstrates the following： （1） Abnormal pressure caused by under compaction can slow the rate of compaction, so framework grains of deeply buried reservoirs show point to line contact and intergranular pores are still main pores. （2） Illitization of smectite can be slowed by reducing mass transport by convection because of closed diagenetic system relatively caused by under compaction. （3） Quartz overgrowth and ferroan calcite cement are restrained by overpressures and closed diagenetic system. There is a good relationship between pressure coefficient and reservoir physical property. So, high quality reservoirs can be predicted by petrology and pressure analysis.

关 键 词：异常压力 欠压实 成岩作用 阜宁组 张家垛油田 

分 类 号：TE122[石油与天然气工程—油气勘探]