Contribution degree of fluidity control for polymer flooding in heavy oil reservoir

4th International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Shi, Leiting^1 ; Zhu, Shijie^1 ; Cao, Jie^2 ; Zhao, Wensen^3 ; Shu, Zheng^1 ; Ye, Zhongbin^1

State Key Laboratory of Oil and Gas Reservoir and Exploitation Engineering, Southwest Petroleum University, Si Chuan Chengdu

610500, China^1

Sinopec Henan Oil Field Branch, He-Nan-Nan-Yang

473132, China^2

State Key Laboratory of Offshore Oil Exploitation, Beijing

100027, China^3

关键词: Contribution degree;    Development directions;    Grey correlation methods;    Heavy oil reservoirs;    Injection pressures;    Oil-displacement systems;    Residual resistance factor;    Solution viscosity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/237/4/042021/pdf
DOI  :  10.1088/1755-1315/237/4/042021

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The unfavorable mobility ratio of heavy oil reservoirs makes the effect of polymer flooding poor. From the mechanism of polymer mobility control, the contribution of viscosity and residual resistance factor to the effect of oil displacement is analyzed to find the development direction of polymer flooding suitable for heavy oil reservoir. Firstly, the mathematical model of polymer flooding can be established to characterize the solution viscosity and residual resistance factor, and then the numerical solution is obtained. The corresponding contribution degree is analyzed by MATLAB using the grey correlation method. The results show that the contribution of the viscosity of the polymer solution to the injection pressure (75%) is significantly higher than the residual resistance factor (25%), but the contribution to the recovery (48%) is slightly lower than the residual resistance factor (52%). Under the conditions of limited injection pressure, the oil displacement system with low viscosity and high residual resistance factor is more beneficial to the mobility control of polymer flooding in heavy oil reservoirs.