鄂尔多斯盆地吴旗地区长6储层孔隙结构特征  

CHARACTERISTICS OF PORE STRUCTURE OF CHANG6 RESERVOIR IN WUQI AREA,ORDOS BASIN

作　　者：肖玲[1] 田景春[1] 魏钦廉[1] 张春生[2] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,四川成都610059 [2]长江大学地球科学学院,湖北荆州434102

出　　处：《新疆地质》2007年第1期101-104,共4页Xinjiang Geology

基　　金：国家重点基础研究发展规划项目(G1999022507)资助

摘　　要：孔隙结构研究是油藏精细描述、储层综合评价的重要内容,采用铸体薄片、扫描电镜、铸体图像分析、高压压汞和恒速压汞等多种技术手段,对鄂尔多斯盆地吴旗地区长6储层的孔隙结构进行了深入分析和研究.鄂尔多斯盆地吴旗地区长6储层具有高孔低渗的特征,储层以原生剩余粒间孔为主,长石、岩屑及早期碳酸盐胶结物的溶解是形成次生孔隙的主要原因.中孔和小孔是油气的主要储集空间,细喉和中喉则是长6的基本渗流通道.铸体薄片、孔喉图像分析表明,吴旗长6储层具有复杂的孔喉分布特征,不同微相孔喉分布及孔隙结构特征是造成油井产能差异的重要因素.The pore structure study is an important content of fine gas reservoir description and comprehensive reservoir evaluation. The microscopic pore structure of chang6 reservoir in Wuqi area was thoroughly analyzed and investigated by using of many technical means such as cast thin section, scanning electron microscope, cast image analysis, high-pressure mercury injection and constant velocity mercury injection, etc. The chang6 reservoir is characterized by high pore and low permeability. The main pore type of the reservoir is primary remained intergranular pore, the dissolution of the feldspar, the debris and early carbonate cement results in the secondary pore. The most reserved space is mesopore and macropore, and fine throat and midthroat is the basic seepage passage. Pore-throat image of thin-section shows that the reservoir chang6 has complicated pore-throat distributed character. Various pore-throat distributions of microfacies and various pore structure characters are important factors that lead to difference of oil-well productivity.

关 键 词：鄂尔多斯盆地 孔隙 喉道 孔隙结构 沉积微相 

分 类 号：P618.13[天文地球—矿床学]