济阳坳陷断块油藏构造特征

Tectonic Characteristics of Fault Block Oilfield in Jiyang Depression

作为胜利油田重要探区之一的济阳坳陷油气储量相对丰富。在高精度地震资料解释的基础上,对济阳坳陷含油断块特征进行了分析。研究表明,坳陷内断块具有断层多、反向断块多、断块小的特征,自然断块内部发育众多的次级断层。多个断块所构成的断块区表现为"堑式"背斜、逆牵引、穹窿背斜及鼻状等构造形态;剖面上以地垒、阶梯状及"Y"字型断层组合样式为主。断块之间通过变换构造相连接,形成一个动力学变形相互协调的构造变形域。

As one of the most important exploratory areas, the oil and natural gas reserves of Jiyang Depression are relatively abundant. With the interpretation of high precision seismic data, the character of Jiyang Depression oil-bearing blocks has been analyzed. The research shows that the fault-blocks in the depression are featured by large amount of faults and lots of counter regional faults and smaller fault-blocks, which contains many secondary faults. The block zone composed of many fault-blocks shows a structure form of graben-anticline or reverse drag anticline or dome and nose structure. And the main profile composite patterns are horst, stepladderhorst and ＂Y＂ font. Fault-blocks are connected by transition structure, which forms a dynamic deformation coordinated tectonic deformation of the domain.