开江-梁平台内海槽东段长兴组礁、滩相储层特征

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.

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

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...