Study on the Influence of Inaccessible Pore Volume of Polymer Development

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Xiong, Lei^1 ; Huang, Yu^2 ; Wu, Yuewei^2 ; Gao, Chaochao^2 ; Gao, Wenxi^3

No.1 Oil Production Plant, Xinjiang Oil Company, PetroChina, Xinjiang, Karamay

834000, China^1

Exploration and Development Research Institute, PetroChina Huabei Oil Company, Renqiu, Hebei

062552, China^2

No.1 Oil Production Plant of Daqing Oilfield Co. Ltd., PetroChina, Daqing, Heilongjiang

163000, China^3

关键词: Laboratory experiments;    Numerical simulation method;    Optimal values;    Permeability increase;    Polymer adsorption;    Polymer flooding;    Reservoir formation;    Transfer time;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022045/pdf
DOI  :  10.1088/1755-1315/170/2/022045

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, laboratory experiment and numerical simulation methods show that: (1) For reservoir formations with different permeability, there exists an optimal molecular weight for injection, and as the permeability increases, the optimal molecular weight gradually increases; (2) Inaccessible pore volume is too large, the polymer solution to reduce the volume; Inaccessible pore volume is too small, the polymer adsorption loss increases, affecting the polymer flooding effect. Therefore, there is an optimal value for the inaccessible pore volume; (3) At different times into polymer flooding, the optimal inaccessible pore volume will change, and the later the transfer time, the best access to the larger inaccessible pore volume. For example, the optimal unobtainable pore volume at 90% water injection is 0.4, while the optimal inaccessible pore volume at 30% aqueous transfer is 0.3.