Numerical Simulation of Fracturing Wells Considering Desorption and Diffusion Effect for Shale Gas with Gas-Water Two Phases
Received date: 2014-09-25
Revised date: 2014-12-23
Online published: 2015-09-10
Hydraulic fracturing is an essential technology to stimulate shale reservoirs,and accurate prediction of fractured shale gas well productivity is the basic for the efficient development of shale gas reservoir.This paper establishes a gas-water two-phase percolation mathematical model under the condition of desorption and diffusion by means of numerical simulation and calculation method.And the numerical model is given in this paper.By means of the simulator for post-fracturing performance of the shale gas reservoir is developed,and quantitative analysis of the influence of fracture parameters,physical parameters and desorption diffusion parameters to fractured shale gas well production is investigated.The research results show that hydraulic fracturing improves single well production,and it′s an effective measure to develop shale gas.Therefore the induced hydraulic fracture conductivity and natural fracture permeability are the main influence factors on shale gas production,and the higher the induced fracture conductivity and natural fracture permeability,the higher the gas and water production rate.Relatively speaking,the matrix permeability and diffusion coefficients have less effect on production.
ZHAO Jin-zhou，ZHOU Lian-lian，MA Jian-jun，LI Yong-ming . Numerical Simulation of Fracturing Wells Considering Desorption and Diffusion Effect for Shale Gas with Gas-Water Two Phases[J]. Natural Gas Geoscience, 2015 , 26(9) : 1640 -1645 . DOI: 10.11764/j.issn.1672-1926.2015.09.1640
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