The core recovery rate of offshore glutenite reservoirs is low,and the core quality is poor,so conducting conventional core experimental research is challenging.In order to analyze the pore structure distribution and oil-water phase permeability characteristics of the glutenite reservoirs in Lyuda 29 Oilfield,a three-dimensional digital core model was established using the digital core analysis technology.Based on this study,the static pore characteristics of the core,oil-water seepage law,and the distribution of microscopic remaining oil were studied.The results show that in the early stage of water flooding in the glutenite reservoirs of the Lyuda 29 Oilfield,the microscopic residual oil is mainly distributed in the narrow channel and small pores;in the late stage of water-driven oil,it is distributed in the dead corner of the rock samples,the blind end of the pore space,and the small pores and channels which have relatively large seepage resistance in the discontinuous spots or porphyritic form.The change of water cut shows the characteristics of late water-cut in the early stage,slow water-cut rising rate,and fast water-cut rising rate in the middle and late stages.It is suggested that the Lyuda 29 Oilfield should be transformed into water injection in time,taking water control measures during the development process to slow down the rising rate of water-cut,and adopting a high-performance flooding system to exploit potential scattered residual oil,to improve the displacement effect and enhanced oil recovery(EOR).
digital corepore characteristicscore displacementoil-water phase permeability curveremaining oil distribution
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