TY - JOUR
TI - Solution method of multiphase seepage sequence in heavy oil reservoir by steam injection considering numerical oscillation
AU - Kang Yuanyuan
AU - Lv Jianguo
JN - Thermal Science
PY - 2022
VL - 26
IS - 6
SP - 4869
EP - 4880
PT - Article
AB - In order to improve the dynamic control ability of multiphase flow in heavy oil reservoir by steam injection, he put forward the sequential solution method of multiphase flow in heavy oil reservoir by steam injection based on numerical oscillation, established saturation equation and dynamic equation of multiphase flow in heavy oil reservoir by steam injection, solved the output pressure of multiphase flow in heavy oil reservoir by pressure equation based on volume conservation, and established the sequential solution model of all-component model of multi-phase flow in heavy oil reservoir by steam injection. The output pressure of multiphase seepage in steam injection-production heavy oil reservoir is transformed into parabolic variable, and the saturation and composition are hyperbolic variable models. Through the analysis method of saturation and composition characteristics of all-component model, combined with the pressure signal analysis of numerical oscillation, empirical mode decomposition and spectrum analysis methods are adopted to realize the velocity parameter analysis and multiphase seepage sequence analysis of steam injection-production heavy oil reservoir, and the numerical oscillation analysis and parameter estimation of multiphase seepage in steam injection-production heavy oil reservoir are realized by establishing the sequential solution algorithm of steam injection-production heavy oil reservoir. The simulation results show that this method is used to solve the multiphase seepage sequence of heavy oil reservoir by steam injection, and the parameter estimation accuracy is high, which improves the calculation efficiency of numerical simulation of steam injection and production. The calculation efficiency and accuracy of this algorithm in 2-D and 3-D examples with gravity are verified by examples.