EXPLORATION MODEL OF OIL AND GAS IN SEQUENCESTRATIGRAPHIC FRAMEWORK IN WESTERNSLOPE REGION OF SOUTHERN SONGLIAO BASIN
Li XiangCheng RihuiGuo ShaobinCui Baochen Guo WeiDong QingshuiZhu Jianwei
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029)
China University of Geosciences, Beijing 100083
Changchun University of Science and Technology, Changchun 130026
Evolution of the sedimentary sequences of the continental basins reflects the periodic changes of lake water regime. Thus the reacting sequence of the lacustrine deposits expresses the genetic history of the oil and gas pool. The orientation and location of the oil and gas pool as well as the characteristics of the reservoir could be managed as the exploration model. Our present work of the western slope region in the southern Songliao Basin, as shown here, is taken as an example.The western slope region in southern Songliao Basin is divided into two megasequences, four supersequences and eight sequences. Sequence Ⅵ consists of RST ,HST and TST which correspond to model Ⅰ,model Ⅱ,and model Ⅲ respectively. TST and HST can be taken for the source rock and RST can be regarded as the reservoir rock.
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