Influences of proppant on fracture making ability and fracture conductivity in coalbed methane

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Sun, Bin^1 ; Guo, Zixi^2 ; Zhang, Yi^1 ; Zhen, Huaibin^1 ; Zhang, Shuling^3 ; Zeng, Qinggang^4

China United Coalbed Methane National Engineering Research Center, Beijing

100095, China^1

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan

610500, China^2

School of Science, Southwest Petroleum University, Chengdu, Sichuan

610500, China^3

Sichuan Kehong Oil and Gas Engineering Limited Corporation, Chengdu, Sichuan

610051, China^4

关键词: Acid fracturing;    Calculation models;    Coalbed methane production;    Flow experiments;    Fracture conductivities;    Fracture width;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/3/032012/pdf
DOI  :  10.1088/1755-1315/310/3/032012

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The fracture conductivity is one of the most important factors affecting coalbed methane production. The size of proppant, the number of proppant placement layers and the embedment all affect the permeability, thus affecting the fracture conductivity. However, exist research ignored the influence of fracture width. Therefore, according to the formula for calculating the fracture width of acid fracturing, the formula for calculating the fracture width is deduced. According to Carman-Kozeny formula, the fracture conductivity calculation models with and without embedment are respectively established. Through conducting the flow experiment on the coal core, the influence of the number of placement layers and embedment degree on the fracture conductivity is analyzed. The results show that the larger the particle size of proppant is, the more layers are laid, and the wider the fracture width is, thus the greater the fracture conductivity is. The smaller the embedment degree of proppant, the greater the fracture conductivity.