关键词: 渗透率各向异性, 油藏模拟, 驱替, 井距, 注采压差

Abstract: Permeability Anisotropy is an essential property for the formation, especially for the formation of fluvial facies. And this property would lead to some negative influence upon the efficient development of reservoir. During the reservoir development, with retaining the formation energy by water injection, the injection fluid preferentially flowed along the high permeability direction, and this would cause that the water breakthrough times for production wells in different directions were different obviously from each other, and result in the unbalanced displacement, consequently influence the effects of reservoir development. The countermeasures, which were called wellspacingcontrol method and the injectionproduction pressure difference control method, were put forward on the basis of the percolation mechanics theory for the above problem. Then the validation of the two methods was verified by numerical reservoir simulations. The test results demonstrated that the two methods could both help to bring about the balanced displacement of injection fluid, and thus could ensure the consistency of the waterbreakthrough times for the oil wells in different directions,accordingly they could restrain the negative influence of the permeability anisotropy.

Key words: permeability anisotropy, oil reservoir simulation, displacement, well spacing, injectionproduction pressure difference