Study Of Fault System And Its Control Of Hydrocarbon Accumulation In The Eastern Slope Zone, Lishu Fault Depression

Fault development and fracture control, but the role of different types of fracture in oil and gas accumulation is not clear Lishu fault depression in the slope zone east. In this paper, in order to determine the control action of all kinds of fracture of oil and gas, for the purpose of the first study to research basic accumulation conditions in the area;Second, the study of the fracture geometry and kinematics in the study area, to determine the fracture form evolution characteristics;Again, on the basis of fracture formation evolution characteristics of fracture system in the studied area division;In the final analysis all kinds of fracture system in the role of hydrocarbon accumulation.The following conclusions:(1) the study area fracture development and fracture from fault depression to depression layer show the evolution regularity, fracture mainly for city fire stone mountain ~ camp group activity period(early) and denglouku ~ nenjiang group(middle) and four ~ quaternary(late), the fracture properties of stretching, twisting and strike-slip respectively;(2) on the basis of fracture "3 period", "three properties" evolution mechanism, fracture system in the study area can be divided into six types.(3) in the late quantou formation- the activity of fault and reservoir can be and shahe subgroups hydrocarbon source rock is connected the fracture calibration oil source fault, the fault is mainly for the early stretch- transtensional mid- late pressure torsion fracture system(Ⅵ type) and the terminal pressure torsion strike-slip rupture(Qin Dong fracture, Ⅲ type);(4) wide east uplift belt, slope and seven tree Qin Dong southern slope Ⅳ and Ⅰ fracture system, the main development Ⅳ Qin Gutun off lung development and Ⅵ fracture system, now have found that the oil and gas mainly controlled by Ⅳ fracture system block accumulation, Ⅵ shaped fracture system are the main oil source faults in the study area fracture system, controlling the vertical transportation of oil and gas, in Qin Gutun break long belt control are distributed in oil and gas layers.