Abstract

Numerical simulation of permeation fluid mechanics for three phase water, oil and gas-chemical compound combination flooding of the polymer, surface active agents and alkali in porous media is discussed in this paper. In view of petroleum geology, geochemistry, computational mechanics of flow and computer technology, a permeation fluid mechanics model of three phase chemical compound combination flooding is presented firstly, then a numerical algorithm consisting of a full implicit program, an implicit computation for the pressure and an implicit/explicit program respective for the pressure and the concentration is given by structuring an upstream sequence and an iterative algorithm of implicit fined upwind fractional step finite difference to solve the pressure equation, the saturation equation and the concentration of chemical substance components and the petroleum acid concentration equation. A type of high accuracy software applicable in major industries is made on ten-meter steps, one hundred and fifty thousand nodes and tens of years and has been carried out successfully in analysis and simulation of national major oil-fields extraction such as Daqing Oilfield, which gives rise to outstanding economic and social benefits. A precise analysis is given for a simplified model and an idea is presented to solve this international famous problem.

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