Accurate identification of dominant seepage channels in turbidite reservoirs——a case study of Niu20 block of Niuzhuang Sag in Shengli Oil Region as an example
In view of the development conditions of uneven plane water drive,insufficient liquid supply at the edge and violent flooding in the core of Niu20 turbidite sandstone reservoir in Niuzhuang Sag,the domi-nant seepage characteristics under the constraint of different micro-facies micro-pore throat structures are depicted by 3D digital core simulation based on the characteristics of turbidite geological reservoir.Macro-scopically,based on the fine characterization of remaining turbidite oil,the dominant seepage flow lines are identified.The research shows that through in-depth dynamic and static analysis,it is clear that the domi-nant seepage channels of Niu 20 are mainly distributed in the nuclear microphase,and the results of the combined identification of the dominant seepage channels by multi-technical means are more than 85%consistent with the dynamic development,which can identify the dominant seepage channels of each layer and improve the pertinence of follow-up potential exploration.The research results lay a foundation for a-chieving balanced displacement and enhanced oil recovery in turbidite reservoir in high water cut period,and are of great significance for the beneficial development of low permeability reservoir in high water cut period.
Turbidite reservoirunbalanced water drivemulti-means identificationaccurate and effec-tive identificationequilibrium displacement
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