复杂断块油田弧形断层对油气的聚集作用--以东辛油田东营组油藏为例

以东辛油田东营组油藏为例,在断裂体系研究的基础上,通过对断层垂向封闭性的研究,建立断面正应力与断层封堵能力的关系,发现弧性断层具有独特的控油优势,进而探讨在复杂断块油田中弧性断层的受力机制及形成过程．分析弧形断层的剖面形态及封闭特征,及其对油气藏聚集的控制优势。指出复杂断块油田弧性断层的封闭性优于其他断层,这对寻找构造边缘和构造应力接合部位的次生油藏意义重大。

Arcuate faults in complex fault block oil field and its relation to the accumulation of oil and gas --Taking Dongying Formation of Dongxin Oil Field as an example

On the basis of studying fault system, for example,Dongying Formation of Dongxin Oil Field in Dongying Depression , the closing of faults was studied and the relation between normal stress of fault plane and closed ability was found. The arcuate faults have the special closed capability for petroleum accumulation, the stress mechanism and form process of arcuate faults in complex block oil field were discussed. The characteristic of arcuate fault section and closed mechanism were studied too. The closing of arcuate fault in complex block oil field is better than others, which is important to searching for the secondary oil pool forming in the stress combine and structural edge.