Sedimentology and accumulation effect of humid fan of the Jurassic Badaowan Formation in Chunhui Oilfield，northern margin of Junggar Basin
Xiao Xiongfei1，2
1 Western New Prospect Research Center, Shengli Oilfield Company of SINOPEC, Dongying 257015, Shandong; 2 School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong
Abstract：Chunhui Oilfield was located in Hashan area in the northern margin of Junggar Basin，of which the Jurassic Badaowan Formation is the main oil-bearing strata，and the sedimentary facies and favorable reservoir distribution regularity constrained the exploration of Chunhui Oilfield.Therefore，based on the data of outcrops，drilling，well logging，coring and laboratory analysis，this article carried out the analysis of sedimentary facies and the favorable reservoir distribution of the Badaowan Formation in Chunhui Oilfield.The results show that，it was warm and humid during the depositional period of the interval 1 of Member 1 of Badaowan Formation, and the humid fan sedimentary was formed by clastic materials from source areas located at northwest of the basin. The upper fan deposits，middle fan deposits and lower fan deposits were recognized in this area，and they were further divided into 6 lithofacies，including the upper fan conglomerate facies; the middle fan braided river glutenite facies，coarse sandstone facies，fine sandstone facies; the lower fan mudstone facies，carbonaceous mudstone and coal facies. The middle fan coarse conglomerate and fine sandstone facies are the most favorable accumulation lithofacies zones，as well as the dominant hydrocarbon migration pathway，which constrained the scale and boundary of hydrocarbon accumulation.
Xiao Xiongfei. Sedimentology and accumulation effect of humid fan of the Jurassic Badaowan Formation in Chunhui Oilfield，northern margin of Junggar Basin[J]. JOPC, 2013, 15(1): 113-124.
