Calculation of Relative Permeability of Low Permeability Rock with Multiple Factors

Abstract

Abstract: Relative permeability of reservoir is very important for making a development program in an oifield. It is often tested by an unsteady state flow experiment and calculated by JBN method, which is only fit for Darcy flow through medium-high permeability with high velocity of displacement because of taking neither non-Darcy flow nor capillary attraction into account. Formulas of calculating relative permeability with starting pressure gradient, capillary attraction and gravity are derived respectively according to water wet core and oil wet core. The formulas can not be restricted by high experimental displacement velocity. This method can be used to deal with lab determination and calculated method for unsteady state relative permeability of low permeability reservoir.

Key words: low permeability reservoir, non-Darcy flow, relative permeability, unsteady state flow

CLC Number:

TE312

DENG Ying-er, LIU Ci-qun, PANG Hong-wei. Calculation of Relative Permeability of Low Permeability Rock with Multiple Factors[J]. Xinjiang Petroleum Geology, 2003, 24(2): 152-154+188.

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Calculation of Relative Permeability of Low Permeability Rock with Multiple Factors

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