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《Journal of Shandong University(Natural Science)》 2018-10
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Improvement on the solution of pressure equation based on alternating direction in chemical flooding model

CAO Wei-dong;DAI Tao;YU Jin-biao;WANG Xiao-hong;SHI An-feng;Exploration and Development Research Institute,Shengli Oilfield Branch Company,SINOPEC;Department of Thermal Science and Energy Engineering,University of Science and Technology of China;  
Based on the general chemical flooding mathematical model for numerical simulation at home and abroad,an improved alternating direction iterative algorithm for solving phase pressure equation is proposed. An alternating direction iterative scheme for three dimensional parabolic equations is constructed,and a newcalculation method for the iterative parameters is proposed with the second kind boundary condition and strong heterogeneous condition which is common in reservoir simulation model and practical geological model. The numerical algorithm is realized with SLCHEM,which is a simulation software of Shengli oilfield with independent intellectual property rights. Examples tests of actual field models showthat the newstructure of the alternating direction iterative algorithm improves the computational speed by more than 16% compared to the original preconditioned conjugate gradient algorithm,and the calculation accuracy could meet the application demand.
【Fund】: 国家科技重大专项资助项目(2016ZX05011003);; 山东省重点研发计划资助项目(2017GSF216001)
【CateGory Index】: O241.82
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