岩性油气藏 ›› 2018, Vol. 30 ›› Issue (1): 7585.doi: 10.3969/j.issn.1673-8926.2018.01.008
韩波1,2, 何治亮2, 任娜娜3, 田海芹2, 马强2
HAN Bo1,2, HE Zhiliang2, REN Nana3, TIAN Haiqin2, MA Qiang2
摘要: 随着安岳气田龙王庙组气藏的发现,四川盆地下寒武统龙王庙组已成为油气勘探的重点层位。基于四川盆地东缘龙王庙组野外露头和岩心观察,通过岩石普通薄片、铸体薄片、X射线衍射、白云石有序度、碳氧稳定同位素和物性测试等,对四川盆地东缘龙王庙组碳酸盐岩储层特征、成岩作用等进行了研究。结果表明,四川盆地东缘龙王庙组沉积期以局限台地和开阔台地沉积为主,主要发育有云坪、颗粒滩、灰坪等,垂向上发育多个滩坪组合序列。储层岩性主要为颗粒白云岩、晶粒白云岩,其次为发生部分白云石化作用的颗粒灰岩,其中颗粒白云岩物性最好,粉晶和细晶白云岩次之,颗粒灰岩发生白云石化部分具有一定的储集性能,未发生白云石化部分通常较致密。储集空间类型为粒间溶孔、晶间溶孔及微裂缝等。储层主要分布在白云石化程度较高的颗粒滩相,颗粒滩是储层形成的物质基础;同生期及早期成岩阶段的白云石化作用和准同生期溶蚀作用是储层发育的2种主要建设性成岩作用,是控制储层发育的关键因素。
中图分类号:
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