Characteristics of Slope Breaks and their Control on the Lithostratigraphic Hydrocarbon Reservoir in Beixi Slope Area of the Hailaer Basin

In the control of palaeogeomorphology and fracture, multistage slope break zones are developed in Beixi Slope. After the analyses of the structural-paleogeomorphologic features, according to the relationships between slope break zones and subsags, we divide the slope break zones into three cells—inner slope break zones, middle slope break zones and outer slope break zones. Compared with the outer and middle slope break zones, the fault block traps are richly developed in the inner slope break zones, which is nearer to the oil generating depressions. And the conditions of reservoirs there are good. So they are excellent for hydrocarbon accumulation and preservation with good oil accumulating conditions.