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.
Highlights
There remains plenty of residual crude oil in the reservoir after water-flooding exploiting because the constraint of capillary force weakens the motion and the volume of influenced regions is small due to the disadvantageous fluidity ratio between displacement phase and driven phase
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, 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
Summary
There remains plenty of residual crude oil in the reservoir after water-flooding exploiting because the constraint of capillary force weakens the motion and the volume of influenced regions is small due to the disadvantageous fluidity ratio between displacement phase and driven phase. By numerical research the curves describing different components motion are shown, and some plans are made about the beginning and end of injected liquid and some related parameters of natural oil efficiency are derived These conclusions, important techniques in chemistry displacements, can used in forecasting the characters of fields, choosing different optimization plans, establishing the models of chemical displacements of reservoir, completing computational software and carrying out the numerical simulation. Later the authors accomplish a key tackling program of Daqing Petroleum Administration Bureau (DQYJ-1201002-2006-JS-9565)—-solving development of mathematical models and completing explain of reservoir3 This software system is applied in numerical simulation of the polymer displacement of Zaobei fault block of Dagang Oilfield, optimization of designing plan of expanded experimental area of three compound combination flooding of Gudong Little Well experimental region of Shengli Oilfield, polymer flooding of Gudong Middle One experimental region, Gudong West region and feasibility of active water flooding of Gudong eighth region, and many interesting results are obtained. This paper summarizes the former research and discusses proceeding analysis, mainly consisting of permeation fluid mechanical mathematical models of numerical simulation of chemical flooding in porous media, numerical methods, applicable software structuring and numerical simulation, applications and analysis of horizontal wells in actual oilfields
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
