鄂尔多斯盆地陇东地区合水-塔尔湾长7储层特征及成岩作用研究  

RESERVOIR CHARACTERISTICS AND DIAGENESIS OF YANCHANG 7 MEMBER IN HESHUI-TAERWAN,EAST GANSU PROVINCE IN ERDOS BASIN

作　　者：高伟[1] 焦创赟[1] 屈亚龙 陈小东[1] 汪澜[1] 雷秀洁 

机构地区：[1]中国石油长庆油田公司超低渗透油藏研究中心,陕西西安710021

出　　处：《天然气勘探与开发》2012年第4期22-27,8,共6页Natural Gas Exploration and Development

基　　金：国家重大油气专项(2008ZX05001-002)"岩性地层油气藏沉积储层特征与成藏机理研究"

摘　　要：综合运用物性分析、岩石薄片、铸体薄片、扫描电镜以及阴极发光等测试方法与资料,对合水—塔尔湾长7砂岩储层开展岩石学特征、储层物性特征、成岩作用及有利成岩相带等研究,划分出五种成岩相,其中自生高岭石胶结+溶蚀相、石英加大和高岭石胶结+弱溶蚀相以及粘土薄膜和石英弱加大胶结+溶蚀相是储层发育有利的成岩相带,而机械压实致密相和钙质胶结交代致密相几乎使储层完全丧失储集性能。长7砂岩储层成藏条件优越,油气资源潜力巨大,可作为下一步重点勘探层系。Based on some analysis of physical-property data,thin section and casting thin-section,and other methods of SEM and cathodoluminescence,the characteristics of both petrology and physical property,and the diagenesis and the favorable diagenetic facies belt of Yanchang 7 Member in Heshui-Taerwan are studied.This member can be divided into five diagenetic facies belts.Among them,there are three ones favorable for reservoir growth,such as autogenic kaolinite cementation adding dissolution facies,quartz second and kaolinite cementation adding weak dissolution facies,and clay membrane and weak quartz second cementation adding dissolution facies,However,the rest twos including mechanically compaction tight facies and calcareous cementation metasomatism tight facies nearly make reservoir lost its restorative ability totally.With better reservoir-forming conditions and huge resources potential,Yanchang 7 Member may be taken as the next key exploration target.

关 键 词：延长组 成岩作用 有利成岩相带 合水-塔尔湾 鄂尔多斯盆地 

分 类 号：P618.13[天文地球—矿床学]