开江-梁平台内海槽东段长兴组礁、滩相储层特征  

Characteristics of reservoirs of Upper Permian Changxing Formation in the eastern Kaijiang-Liangping intraplatform trough in Sichuan,China

作　　者：耿威[1] 郑荣才[1] 李爽[2] 李瑰丽[2] 郑超[2] 胡忠贵[1] 

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,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）》2008年第6期639-647,共9页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中国石油西南油气田分公司资助项目

摘　　要：在岩心和测井分析基础上,结合铸体薄片、扫描电镜、阴极发光薄片、碳氧同位素、锶同位素、包裹体、物性和孔隙结构等分析化验资料,对开江-梁平台内海槽东段地区长兴组生物礁储层特征进行了研究。该套储层以白云岩为主,储集空间以晶间孔和晶间溶孔最为发育;储层物性中等-较差,但裂缝和溶缝较发育,对改善储层孔渗性有重要贡献,为典型的低孔中渗裂缝-孔隙型储层。储层的质量受沉积微相、成岩作用以及构造活动的综合影响,其中以礁、滩相最有利储层发育。区域上礁、滩相沉积的分区控制了储层的分布;埋藏白云石化是储层发育的基础;而溶蚀和破裂扩大作用是提高储层质量的关键。This paper studies the characteristics of the Upper Permian Changxing Formation reservoir in the eastern Kaijiang-Liangping intraplatform trough in light of the data on some tests and analyses including the cores, logs, casting sections, SEM, cathodoluminescence section, carbon and oxygen isotopes, strontium isotope, inclusions, reservoir property, and mercury injection test. The reservoir space is mainly in dolomite. A large amount of intracrystalline pores and intercrystalline solution pores develop in the reservoir. The reservoir property is medium or poor, but its porosity and permeability are improved by fractures and solution fractures. So the Changxing Formation reservoir in the eastern Kaijiang-Liangping intraplatform trough is a typical fracture-pore reservior with low porosity and medium permeability. The quality of the Changxing Formation reservior is affected by microfacies, diagenesis, tectonic movement and others comprehensively. The reef and flat facies, which are favorable for the development of reservior space, control the distribution of the reservior. Burial dolomitization is primarily beneficial to the reservior development, and the solution and fracturing are important for improving the quality of the reservoir.

关 键 词：开江-梁平台内海槽东段 上二叠统长兴组 礁 滩微相 成岩作用 储层特征 

分 类 号：TE122.221[石油与天然气工程—油气勘探]