Rheological Properties of BCG-CO2 Fracturing Fluid for Shale Gas

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

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, Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil and Gas Reservoirs, School of Petroleum Engineering, Xi'An Shiyou University, Xi'an, Shaanxi

710065, China^2

关键词: Effective viscosity;    Experimental conditions;    Fracturing parameter;    Rheological characteristics;    Rheological property;    Water consumption;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/4/012026/pdf
DOI  :  10.1088/1755-1315/186/4/012026

来源: IOP

【 摘 要 】

BCG-CO2 fracturing fluid system is especially suitable for shale gas stimulation with advantage of minimizing the actual water consumption, reducing the damage to formation, recovering more rapidly and efficiently, etc. A major objective of this article is to ascertain the rheological properties of BCG-CO2 fracturing fluid in a wide range of experimental conditions for guiding the selection of fracturing parameters. The experimental results showed that as the temperature reaches 35 °C, the effective viscosity of BCG-CO2 fracturing fluid has an obvious increase. Apparently the shear rate change below 1000 s-1 is sharper than that above 1000 s-1. The effective viscosity presents an increase trend with increasing foam quality under foamed conditions. It has been concluded that the key factors influencing rheological characteristics of BCG-CO2 fracturing fluid are both temperature and foam quality, and the exponential function form can be used to describe the change rule approximately.