The Theory of Pressure-difference-time of Planar Radial Fluid Flow of Oil-water Two Phase Fluid

doi:10.11885/j.issn.1674-5086.2020.07.09.01

Abstract

Abstract: There is a pressure difference between the bottom hole and the outer boundary of the reservoir in the process of planar radial fluid flow. In view of the problem that the oil-water two phase fluid flow under the condition of changing pressure difference, the concept of pressure-difference-time is improved and the functional relationship is studied. The research method is to use the basic fluid flow theories to derive the function relationship of pressure-difference-time. The numerical simulation method and formula calculation method are used to calculate and compare the specific examples. The results of the study are satisfactory. The improved concept of pressure-difference-time is suitable for planar radial fluid flow. The function relationship between pressure-difference-time and cumulative liquid production or cumulative water injection is obtained. The numerical simulation results of the specific example are consistent with those of the formula. The following conclusions are obtained in this paper: pressure-difference-time is a function of cumulative liquid production or cumulative water injection. The factors influencing pressure-difference-time include relative permeability curve, oil viscosity, water viscosity, permeability, cumulative liquid production or water injection per unit thickness, pore volume per unit thickness of disk-shaped reservoir in outer boundary, pore volume per unit thickness of the disk-shaped porous media in the wellbore radius.

Key words: planar radial fluid flow, pressure-difference-time, variable pressure, seepage, oil-water two phase

CLC Number:

TE312

LIU Hailong. The Theory of Pressure-difference-time of Planar Radial Fluid Flow of Oil-water Two Phase Fluid[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(5): 85-97.

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