斜坡区和隆起区断裂密集带差异性及其对油气分布的控制作用

Difference between Dense Faulted Zones in Slope Area and Uplifted Area and Its Controlling Effect on Hydrocarbon Distribution

此文以霸县凹陷文安斜坡和饶阳凹陷留楚构造为研究对象,对比了斜坡区和隆起区断裂密集带的特征及其对不同构造部位油气分布的控制作用。在三维地震资料、钻井资料和已发现油气藏特征的基础上,利用断裂密集带识别方法和分类方案,识别出文安斜坡和留楚构造的断裂密集带,并对其进行了分类。对比两种构造部位断裂密集带发育的差异性及对油气分布的控制作用,认为隆起区(留楚构造)相对于斜坡区(文安斜坡)断裂密集带发育数量较少,规模大,斜坡区断裂密集带主要以顺向背形断裂密集带为主,而隆起区主要以屋脊背形断裂密集带为主,隆起区油气主要分布在顺向背形断裂密集带内,斜坡区主要分布在屋脊背形断裂密集带内部及靠近生烃中心的边部。

Taking the Wenan slope in Baxian Depression and the Liuchu structure in Raoyang depression as the research objects,this paper compares the characteristics of faulted dense zones in the slope area and uplifted area and their controlling effects on oil and gas distribution in different structural parts.Based on the 3D seismic data,drilling data and the characteristics of hydrocarbon reservoirs,the faulted dense zone identification method and classification scheme are used to identify and classify the faulted dense zones of Wenan slope and Liuchu structure.The differences in the development of dense faulted zones in the two tectonic locations and their control on the oil and gas distribution are compared.It is believed that the uplifted area(Liuchu structure)is less developed and larger in scale than the slope area(Wenan slope).The dense faulted zones in the slope area are mainly dominated by the consequent dorsifixed dense faulted zones,while the uplifted area is mainly dominated by the roof dorsifixed fault dense zones.The oil and gas in the uplifted area is mainly distributed in the dense zones of the orthomorphic faults,while the oil and gas in the slope area is mainly distributed in the dense zones of the orthomorphic faults and the edge near the hydrocarbon generation center.