川口油田长6储层成岩作用  

Diagenesis of Chang 6 Reservoir in Chuankou Oilfleld

作　　者：薛军民[1,2] 解伟 王震[4] 张林 

机构地区：[1]西北大学地质学系,西安710069 [2]陕西延长石油(集团)有限责任公司,西安710075 [3]陕西延长石油(集团)研究院,西安710075 [4]长安大学资源学院,西安710054 [5]长庆工程技术研究院,西安710021

出　　处：《吉林大学学报（地球科学版）》2009年第6期1007-1012,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家科技支撑计划项目(2007BAB17B00)

摘　　要：详细分析了川口油田长6储层的成岩作用类型、储层物性演化及影响因素。通过岩石学、铸体薄片、电镜扫描等研究方法说明川口油田长6储层主要成岩作用包括压实-压溶作用、胶结作用、交代蚀变作用及溶蚀作用等,成岩阶段属晚成岩A期。其中,机械压实作用、化学胶结作用是导致砂岩孔隙度降低、储集性能变差的主要因素。机械压实作用主要表现为软碎屑的塑性变形、颗粒间由点接触向凹凸接触演变;胶结作用表现为浊沸石、绿泥石、粘土矿物、碳酸盐胶结;石英和长石的次生加大、溶蚀作用特别是浊沸石的溶蚀在一定程度上提高和改善了砂岩储集性能。结果表明,影响储层物性的主要因素为沉积作用和成岩作用。The authors made a detailed ana and its influencing factors of Chang 6 reservoir lysis of the diagenesis types, physical property evolution of the Chuankou oilfield. According to petrography, thin section analysis and scanning electrical microscopy analysis, the diagenesis mainly includes compactionpressolution, cementation, metasomatic alteration and denudation, and its diagenetic stage is on phase A of the late diagenetic stage. Among these, compaction and chemical bond are the main factors to cause the sandstone porosity reduction and the accumulation capability degradation. The compaction is mainly demonstrated as the plastic deformation of soft debris, and the evolution from the point contact of granular particles to concave-convex contact of granular particles. The cementation is mainly displayed as aedelforsite cementation, chlorite cementation, hydrosyalite cementation, carbonate cementation, quartz secondary enlargement and feldspar secondary enlargement. The denudation, especially the aedel forsite corrosion, enhances the sandstone accumulation capability. The main factors that influence the reservoir physical property are sedimentation and diagenesis.

关 键 词：川口油田 长6油层组 孔隙结构 成岩作用 影响因素 油气 

分 类 号：P618.13[天文地球—矿床学]