Study on Filtration and Damage Characteristics of Modified Dry CO2 Fracturing Fluid in Shale Gas Reservoir

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Xu, Guixi^1 ; Wang, Shuzhong^1 ; Luo, Xiangrong^2 ; Jing, Zefeng^1

Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'An Jiaotong University, Xi'an, Shaanxi

710049, China^1

Eng. Res. Ctr. of Devmt. and Mgmt. for Low to Extra-Low Permeability Oil and Gas Reservoirs in W. China, Ministry of Education, School of Petroleum Engineering, Xi'An Shiyou University, Xi'an, Shaanxi

710065, China^2

关键词: Damage rate;    Porous medium;    Shale formation;    Shale gas reservoirs;    Supercritical CO2;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012180/pdf
DOI  :  10.1088/1755-1315/94/1/012180

来源: IOP

【 摘 要 】

The filtration and damage characteristics of modified dry CO2fracturing fluid in the shale is studied in this paper. The results show that the modified dry CO2fracturing fluid has good leak-off characteristics. Compared with liquid CO2, supercritical CO2has a better permeation and diffusion capacity in the porous medium. The damage rate of the modified dry CO2fracturing fluid to shale core is only between 0.63%∼3.84% with obvious little damage. Under liquid conditions, the increase of temperature makes the fracturing fluid more harmful to shale formation.