Dehui fault depression has been explored for more than forty years,while less breakthrough has been made since 1990s,so it is significantly to deep understand the geochemical character and origin of deep natural gas to the next exploration.

Dehui depression,is located in the center of East fault depression of SE uplift,the south Songliao basin;north Changchun,cross Nong‘an and Dehui two counties.

Moreover, combined with structural geology feature of Dehui depression, the combination law of oil source bed, reservoir, caprock of Dehui formation is studied and the distribution area of favourable sand body is predicted.

Combining the field petroleum geologic review on the outcrops with the well and seismic information,the mudstone,carbonate rock and coal-measure hydrocarbon source rocks in the Mesozoic Jurassic and Paleozoic Carboniferous are considered widely developing in the Delingha Fault-Depression.

Research on the denudation thickenss of the fourth member of Shahejie Formation and Kongdian Formation by wave analysis method in Huimin Depression;

Conditions of petroleum pools formation of the fourth member of Shahejie Formation in the west Huimin Depression;

Analysis of Cenozoic Tectonic Subsidence History and Wave Cycle in Huimin Depression;