北塘凹陷断裂特征与油气分布规律

基底大断裂控制了北塘凹陷的构造格架,形成了各具特征的西部、北部和南部三大断裂系统.发育了7种成因特征的断裂,总结出6种断裂组合发育模式.基底大断裂(临近生油区的)及其次级断裂控制了油气的宏观分布,形成以断裂为主控因素的复式油气聚集区带.对油气生运聚散和分布有控制作用的控烃断裂有:控源断裂、油源断裂、遮挡断裂、改向断裂、控圈断裂和破坏断裂6种基本类型.断块是油气藏的基本单元,其周边断裂既是遮挡断裂又是控圈断裂.

Characteristics of the fractures and distribution of petroleum in Beitang depression

Deep basement fractures control the tectonic framework of Beitang depression, and three fracture systems form in the west, the north and the south of the depression separately. There are seven types of fractures which have different genetic features. The fractures are classified into six combination development models. Deep basement fractures (near hydrocarbon source region) and their secondary fractures control the magnificent distribution of oil gas, and therefore complex oil gas accumulation zones are formed. These fractures have effects of on the generation, migration, accumulation and distribution of hydrocarbon, so they are called hydrocarbon controlling fractures. The hydrocarbon controlling fractures is also classified into 6 kinds of basic types. Fault block is the basic unit of petroleum accumulation, and the fractures around the fault block are not only barrier fractures but also trap controlling fractures.