准噶尔盆地西北缘克百地区三叠系储层溶蚀作用特征及孔隙演化  

Dissolution Characteristics and Pore Evolution of Triassic Reservoir in Ke-Bai Area,Northwestern Margin of Junggar Basin

作　　者：朱世发[1,2] 朱筱敏[1,2] 王一博 徐兆辉[4] 李德江[5] 鲜本忠[1,2] 龚文强[1,2] 

机构地区：[1]油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)资源与信息学院,北京102249 [3]中国海洋石油(中国)有限公司研究中心,北京100027 [4]中国石油勘探开发研究院,北京100083 [5]中国石油勘探开发研究院廊坊分院,河北廊坊065007

出　　处：《沉积学报》2010年第3期547-555,共9页Acta Sedimentologica Sinica

基　　金：中国石油天然气股份公司重点科技攻关项目(编号:2005-2009)资助

摘　　要：基于岩石薄片、铸体薄片、扫描电镜等镜下特征分析,对准噶尔盆地西北缘克百地区三叠系溶蚀作用特征进行了系统的分析。三叠系溶蚀作用发育普遍、现象丰富、对储层改造作用明显,是研究区最为重要的成岩作用类型。"成分成熟度低、结构成熟度中等偏下"的岩石学特征是成岩作用的沉积基础。长石的溶蚀在该区最为常见,胶结作用弱、局部见方解石和方沸石溶蚀,碱性条件下石英弱溶蚀。溶蚀作用对储层的改造决定了克百断裂上、下盘三叠系储层的孔隙空间类型和孔隙的垂向演化。岩石类型、泥质含量和沉积微相等因素控制储层中溶蚀作用的发育程度及分布。Based on a large number of thin-sections,casting thin-sections and scanning electron photomicrographs observation,the characteristics of Triassic dissolution in Ke-Bai area,northwestern margin of Junggar Basin are systematically studied.Triassic dissolution is generally developed in Ke-Bai area,with abundant typical phenomena,and reservoir is obviously re-formed,so dissolution is the most important type of diagenesis in the study area.The lithology characteristics of ＂low compositional maturity,lower-middle textural maturity ＂ provide a sedimentary basis for diagenesis.The dissolution of feldspar is the most common in the area,and cementation is weak,with little calcite and analcime dissolution,quartz is slightly dissolved under alkaline condition.The type of pore space and the vertical evolution of porosity on different walls of the fault belt are determined by dissolution.The intensity and distribution of dissolution was affected by the rock type,matrix content,microfacies and other factors.

关 键 词：准噶尔盆地 三叠系 储层特征 溶蚀作用 孔隙演化 

分 类 号：P588.2[天文地球—岩石学] TE122.23[天文地球—地质学]