川东五百梯气田黄龙组碳酸盐岩储层成岩相  

Diagenetic facies of carbonate rock reservoirs in Huanglong Formation of Wubaiti gas field,East Sichuan,China

作　　者：郑荣才[1] 李珂[1] 马启科[1] 李世临[2] 李爽[2] 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]中国石油西南油气田分公司重庆气矿,重庆400021

出　　处：《成都理工大学学报（自然科学版）》2014年第4期401-412,共12页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金资助项目(41172120)

摘　　要：成岩相研究为重要和有效的储层预测技术方法之一。通过钻井岩心描述、薄片鉴定、样品分析,对川东地区五百梯气田石炭系黄龙组碳酸盐岩储层的岩石学、成岩作用、裂缝和储集空间类型等特征进行了综合研究,划分出5种储层成岩相类型,确定以早-中成岩阶段埋藏白云化-晶间孔成岩相为基础,叠加古表生期大气水溶蚀改造的中等溶蚀-孔洞缝成岩相和强溶蚀-角砾成岩相为有利于储层发育的优势成岩相,储集空间主要为粒间和粒内溶孔、晶间溶孔、铸模孔和各种超大溶孔、溶洞和构造裂缝及溶裂缝,认为沉积环境控制了有利储层分布相带、早成岩阶段埋藏白云化奠定了储层发育基础,古表生期喀斯特作用扩大了储层分布范围和发育规模,而破裂作用是提高储层质量的关键。The diagenetic facies analysis is an important and effective method of the reservoir prediction.By drilling core description,thin section identification and sample analysis,the authors make a comprehensive study of the petrology, diagenesis, cracks and spaces of the Upper Carboniferous Huanglong Formation carbonate rock reservoirs in the Wubaiti gas field and determine five kinds of diagenetic facies.They believe that,based on the early to middle burial dolomitization and intergranular pore diagenetic facies,the superimposing medium solution-pores,holes and fracture diagenetic facies and strong dissolution-brecciated diagenetic facies modified by atmospheric water dissolution in the ancient supergene are the predominant facies favorable for the reservoir development.The reservoir spaces are mainly intergranular and intragranular solution pores, intercrystalline solution pores,moldic pores and various oversized solution holes and caves,structural cracks and solution fractures.It is concluded that the depositional environment has controlled the distribution of the favorable reservoirs,the burial dolomitization in the early diagenesis laid a foundation for the reservoir development,the dissolution in the ancient supergene expanded the karst reservoir distribution and developmental scale,and the fracturing is the key to raise the quality of the reservoir.

关 键 词：碳酸盐岩 古喀斯特储层 成岩作用 成岩相 石炭系黄龙组 五百梯气田 四川盆地 

分 类 号：TE121.32[石油与天然气工程—油气勘探] P588.245[天文地球—岩石学]