0 引言
1 沉积构造背景
2 油气成藏条件
2.1 灯四段台缘带丘滩体特征
2.2 灯四段储集层特征
图4 DB1井灯影组四段储层特征(a) 6 405.33 m,岩溶角砾岩,孔洞见白云石及石英半充填; (b)6 407.07 m,藻凝块块云岩,格架孔洞北白云石及沥青半充填; (c)6 410.82 m,藻凝块云岩,格架孔被白云石及沥青充填;(d) 6 409.43 m,藻凝块云岩,格架孔被白云石及沥青充填;(e) 6 410.92 m,藻凝块云岩,格架孔被白云石及沥青充填;(f) 6 410.61 m,粉晶白云岩,晶间孔及晶间溶孔发育,见沥青半充填 Fig.4 Reservoir characteristics of the fourth member of Dengying Formation of Well DB1 |
2.3 灯四段岩性圈闭特征
2.3.1 大型同沉积断裂控制上倾方向发育滩间洼地相,对蓬莱气区岩性圈闭进行侧向封堵
图6 过DB1井—MX52井灯四段波阻抗反演剖面(见图8导航AA′)Fig.6 Wave impedance inversion profile of the fourth member of Dengying Formation of Wells DB1-MX52(see Fig. 8 navigation AA′) |