关键词: 低渗透, 微乳液驱, 非线性渗流规律, 非达西渗流方程

Abstract: In this paper, the micro-seepage characteristics of low-permeability cores in low permeability reservoirs are analyzed, and on the basis of experimental research, the changes of starting pressure gradient under the condition of water flooding and microemulsion flooding in low permeability reservoir are compared. Based on the boundary layer properties that initiate the pressure gradient of the low permeability reservoir, the low velocity nonlinear seepage flow under the condition of microemulsion flooding in the low permeability reservoir is studied, and the corresponding non-Darcy percolation equation is established. And the accuracy of the non-Darcy percolation equation is verified by simulating the experimental results of the experimental rock samples.

Key words: Low permeability, Microemulsion flooding, Non-linear seepage regularity, Non-Darcy percolation equation