Open AccessA Seepage mathematical model for fractured wells of coalbed methane reservoirs and the corresponding pressure response feature
Author(s) -
Chunchun Liu,
Cong Zhang,
Yueting Xu,
Xinrui Cui,
Weigang Huang,
Aigu He,
Wang Xiang-yan,
Yishan Liu,
Jigang Wang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/714/2/022017
Subject(s) - coalbed methane , petroleum engineering , permeability (electromagnetism) , geology , hydraulic fracturing , methane , porosity , drainage , geotechnical engineering , engineering , coal , coal mining , membrane , waste management , ecology , biology , genetics
Coalbed fracturing is one of the important engineering and technical means of coalbed methane stimulation. To establish the seepage model of coalbed gas fracturing well is the key scientific problem to effectively evaluate the fracturing effect. Therefore, based on the micro pore structure of coalbed methane, this paper constructs the physical model of three porosity and two permeability, the mathematical model of seepage and the mathematical model of bottom hole pressure response, and analyzes the key factors affecting the dynamic response characteristics of pressure. The results show that diffusion coefficient, channeling coefficient, reservoir volume ratio and conductivity have different effects on the bottom hole pressure of the vertical well of three hole and two permeability fracturing. The results of this paper have certain guiding significance for the drainage and production capacity prediction of coalbed methane.