The Control Factors of Shallow Hydrocarbon Accumulation and the Exploratory Directions in Che-Mo Paleohigh in Junggar Basin

The several methods are used to recover the paleogeomorphology in Che-Mo paleohigh with the core, seismic and well logging data for revealing the control effect of sedimentary system and sand distribution on hydrocarbon accumulation within this paleohigh. It is suggested that the Middle Jurassic-Early Cretaceous is the period of Che-Mo paleohigh development, and its heyday appears in the late of Middle Jurassic. The inner-sources supplied from this paleohigh control the sedimentary system and sand distribution around it. The development and burial stage of the paleohigh play the roles in control of hydrocarbon accumulation. The oil-gas regulating, migration and secondary reservoirs distribution are controlled by the two-stage tilting regulations, inner-source sand distribution, fault system and present structure. The inner-source sands surrounding Che-Mo paleohigh and the matched area with present structure would be the favorable areas of lithologic-stratigraphic reservoir development, and the slope belt be the focus domain for the next exploration, based on which the breakthrough has been made by Well Mo-17. And the lithologic-stratigraphic reservoirs could be as the new domains around the paleohigh.