克-百地区二叠系成岩作用  

Diagenesis of Permian reservoir in Ke-Bai Area

作　　者：鲁新川[1,2] 刘振宇[3] 鲁阳[3] 张顺存[1,2] 贾凡建[1,2] 史基安[1] 

机构地区：[1]中国科学院油气资源研究重点实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100049 [3]新疆油田公司勘探开发研究院,新疆克拉玛依834000

出　　处：《断块油气田》2010年第4期397-401,共5页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项项目(2008ZX05008-003-04);国家重点基础研究发展计划(973)项目(2006CB202305)联合资助

摘　　要：为了研究准噶尔盆地西北缘克-百地区二叠系储层的成岩作用，探明研究区主要受控的成岩作用类型、所处的成岩阶段和成岩作用对储集层段物性的影响，采取钻井岩心的普通薄片、铸体薄片、扫描电镜和电子探针分析等手段对研究区的岩石类型进行了分类，并对影响储集层物性的自生矿物的形成进行了研究。结果表明：准噶尔盆地克-百地区二叠系储集层主要经历了压实、压溶、胶结、交代和溶解等一系列复杂的成岩作用．在研究区沸石的成岩作用尤为突出．为研究成岩作用的一大特色。成岩作用中压实作用和胶结作用对储集层的物性起负面影响，压实作用可使孔隙度减少15％～25％：溶解作用对储集层物性有一定的促进作用。研究区二叠系成岩作用阶段主要处于晚成岩阶段B期。Based on the study of the diagenesis of Permian reservoir sandstones in Ke-Bai Area of Junggar Basin, the diagenetic types, diagenetic stages and the diagenetic controls on reservoir quality are examined. In this study, a comprehensive approach that integrates the thin-section petrography, cast thin sections, scanning electron microscopy and electronic microprobe is used to classify the petrography of the reservoir sandstones in the study area and examine the formation of authigenic minerals controlled on reservoir quality. The results show that the Permian reservoir sandstones in Ke-Bai Area of Junggar Basin exhibit several types of diagenetic alterations, such as compaction, pressure solution, cementation, replacement and dissolution. Zeolite cemention is a striking feature of diagenesis in the study area. Compaction and cementation play a negative role in reservoir quality. Compaction can reduce the porosity of reservoir sandstone by 15% to 25%. However, the dissolution can greatly improve the reservoir quality. In this study area, the Permian reservoir sandstones are at the B phase of late diagenesis.

关 键 词：物性 成岩作用 成岩阶段 二叠系 克-百地区 

分 类 号：TE112.2[石油与天然气工程—油气勘探]