The Hydrocarbon Reservoir-forming Conditions' Research Of Baijiahai Area In The East Of Junggar Basin

The research area is ranging from the south of Dishuiqian fault to the north of Bu-2 well and Bu-4 well ,from the east of Cai-35 well to the west of Shaxi fault .It covers about5000 Km2.Based on tire exploration fruit and the research knowledge obtained,this topic sums up the reserveir-forming laws in different structural position and different sequence and establishes the reservoir-forming model in this area by analyzing and studying the source rocks ,reservoir-seal conditions ,trap conditions and matched relationship of hydrocarbon-bearing system .And the following knowledge is gived :1)The Carboniferous and Permian hydrocarbon source rocks are the main source rocks that form hydrocarbon accumulations in Baijiahai area .And the oil-gas accumulations of this area are most formed in the position in which this two source rocks adjoin.2)The oil and natural gas in Baijiahai area are mainly migrated in the way of line ,i.e the oil and natural gas are mainly migrated along the belt such as fractures in vertical or horizontal direction .However .there is little contribution to form accumulation when oil and gas are migrated along the strata surface in the way of plane .So the hydrocarbon accumulations in this area are most developed in the position that fractures are relatively grown.3)The research area is rich of oil source .Trap-source distance and hydrocarbon migration pathway are the most two factors that control formation of accumulation .