Abstract：Submarine fan on shallow shelf are developed in the Member 1 of the Miocene Huangliu Formation in the Dongfang X Gas Field of the Yinggehai Basin. The sedimentary type in this area is special,and the sand body connectivity is complicated. The research on reservoir architecture of submarine fan is relatively weak,which seriously affects the oil and gas exploration and development in the Dongfang X Gas Field. Under the guidance of sequence stratigraphy,sedimentology,logging geology,seismic sedimentology and other theories,and based on the data of core,drilling,logging,3D seismic and seismic wave impedance inversion,the architecture and sandbody distribution pattern within the submarine fan in this area are studied. The results show that: Submarine fan in the study area is mainly middle fan and characterized by the channel,levee,sheet sand and fan margin sand deposits;Channel and sheet sand are common in the IIb gas group of the first member of the Huangliu Formation. Channels are dominated by sedimentation process and can be divided into two stages of development,which are oriented in NW-SE direction;There are three stacking patterns sand body within the reservoir,layered filling,vertical cut-stacking and lateral cut-stacking;The controlling factors of reservoir architecture include the sediment supply,the slope gradient and the energy of the gravitational flow.
Li Ya-Ru,Li Hua,Yang Zhao-Qiang et al. Reservoir architecture of the Huangliu Formation submarine fan in Yinggehai Basin,South China Sea[J]. JOPC, 2022, 24(3): 556-567.
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