0 引言
1 区域地质背景及沉积特征
图4 川南地区中二叠统栖霞组岩性显微特征(a)亮晶生屑灰岩,见残余粒间孔,J45井,2 895 m; (b)W231井,3 430 m,灰质云岩;(c)J45井,2 900 m,细晶云岩,见溶蚀孔 Fig.4 Lithologic microscopic characteristics of the Middle Permian Qixia Formation in the southern Sichuan Basin |
2 邻区高石梯栖霞组典型气藏解剖
3 含油气地质条件分析
3.1 烃源岩及输导条件
3.2 储层条件
图7 川南地区栖霞组储集岩石类型及空间特征(a)盐津北剖面,细晶云岩,晶间孔及晶间溶孔;(b)石厢子剖面,云质灰岩,见铸模孔;(c)石坝剖面,中粗晶云岩,晶间孔发育;(d)J45井,2 899.7 m,细晶云岩,晶间孔发育;(e)L205井,细晶云岩,晶间沥青充填,3 004 m;(f) R232井,2 648 m,细晶云岩;(g) DS1井,2 498 m,灰质云岩,见沥青;(h)L201井,2 240 m,灰质云岩,发育晶间孔;(i)L202井,细晶云岩,3 114 m;(j)W231井,3 436 m,亮晶生屑灰岩;(k)L202井,3 138 m,亮晶鲕粒灰岩;(l)J45井,2 895 m,亮晶生屑灰岩见残余粒间孔;(m)Y22井,4 370.75 m,云质灰岩,溶蚀孔洞发育;(n)曹家堡栖霞组,亮晶生屑灰岩,生物铸模孔;(o)WH104井,细晶白云岩,1 284 m Fig.7 Reservoir rock types and spatial characteristics of the Qixia Formation in the southern Sichuan Basin |