Theoretical Analysis and Applications of Numerical Simulation of Enhanced Oil Recovery

Numerical methods of permeation fluid mechanics for black oil (water, oil and gas)--three compound combination flooding (polymer, surface active agent and alkali) in porous media is discussed in this paper. A mechanics model of three-phase flow (water, oil and gas)--three compound combination flooding (the polymer, surface active agent and alkali) 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-meters steps, hundreds of thousands 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, Shengli Oilfield and Dagang Oilfield and others, which gives rise to outstanding economic and social benefits. The international famous problem is solved. Keywords—three compound combination flooding (the polymer, surface active agent, alkali), permeation fluid mechanics of black oil (water, oil and gas), model and numerical simulation, actual application of oil fields.