Study on fracturing flowback fluid treatment technology for shale gas in Yangzhou

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Shi, Shengwei^1 ; Du, Jiajia^1 ; Kang, Dingyu^1 ; Chen, Xinjian^1 ; Qu, Chengtun^1,2 ; Yu, Tao^1,2

Shaanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory, Xi'An Shiyou University, Xi'an

710065, China^1

State Key Laboratory of Petroleum and Petrochemical Pollution Control and Treatment, Beijing

102206, China^2

关键词: Complex components;    Ferrous sulfate;    Fluid treatments;    Fracturing flowback;    High viscosities;    Inorganic flocculant;    Large displacements;    Oxidation treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/5/052002/pdf
DOI  :  10.1088/1755-1315/121/5/052002

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Shale gas fracturing flowback fluid has the characteristics of high viscosity, large displacement, complex components and difficult to deal with. Therefore, it is of great significance for environmental protection to treat and reuse it. In this paper, Yangzhou shale gas is taken as an object to study the treatment of shale gas fracturing flowback fluid. The results shown that the viscosity of the fracturing flowback fluid before treatment was 16.75mPa•s, and when the pH was adjusted to 3.5, with Cerium(III) sulfate and ferrous sulfate as catalyst and the dosage were 60mg/L and 120 mg/L respectively, and hydrogen peroxide dosage was 0.5%, the viscosity of fracturing folwback fluid was reduced from 16.75mPa•s to 1.97mPa•s; After the oxidation treatment, adjusting pH to 7.5, and treating it with inorganic flocculant and organic flocculant, the water quality met the reinjection requirement of the average air permeability of less than or equal to 0.01 μm2.