岩性油气藏 ›› 2015, Vol. 27 ›› Issue (6): 3847.doi: 10.3969/j.issn.1673-8926.2015.06.006
倪 超1,杨家静,陈 薇1,林建,厚刚福1,王 勇3
Ni Chao 1,Yang Jiajing 2,Chen Wei 1,Lin Jianping 3,Hou Gangfu1,Wang Yong 3
摘要:
四川盆地川中地区大安寨段致密灰岩属于典型的“致密油”储层,在研究其储层特征的同时,重新划分了亮晶介壳灰岩、泥质介壳灰岩、泥晶介壳灰岩及结晶灰岩等 4 类主要的储集岩性,详细研究了溶蚀孔洞、次生微孔、裂缝及纳米级孔这 4 类储集空间的特征,建立了致密灰岩储层连续型似“网状”储集空间组合模型。 通过分析沉积微相、溶蚀作用和构造作用对储层的控制和影响,指出在低能介壳滩主要发育基质微孔储集层,在高能介壳滩主要发育溶蚀孔洞储集层,由此确定了多种储集空间类型组合叠置、大面积连续分布的储层发育模式。 基质微孔与溶蚀孔洞型储集层连续分布区是致密灰岩储层的“甜点”区。
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