Abstract：Large-scale slump turbidite fans were developed in the upper E2l1 of Weixinan Sag,which are favorable targets for the hydrocarbon exploration.A variety of geological and geophysical means such as sedimentary sequence,stratal slice,facies-constrained reservoir prediction,and forward modeling are used to research their internal structures,key controlling factors,and the sedimentary model.The results show that the slump turbidite fan of the upper E2l1 in Weixinan Sag has a few incised channels.They show V-or U-shaped wave or short wave with a spot and strip distribution on seismic profile.The lithologic assemblage is characterized by fining-upward sedimentary sequence.The cores have turbidite structures such as deformation bedding,coiling bedding,and impression.Internal structures of turbidite fan in this area are composed of sand bodies with different thickness,different lateral distribution,and variable contact styles.The internal structures and genesis of the turbidite fans were controlled by middle-deep lake facies,its own gravity,and structural slope-break zone of Fault Zone No.2.This study provides references of the slump turbidite fan study for Weixinan Sag and other basins.
陶倩倩, 周家雄, 孙文钊, 陈丽君, 李达. 滑塌浊积扇内幕结构及成因——以涠西南凹陷流一段上亚段为例[J]. 石油地球物理勘探, 2019, 54(2): 423-432.
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