RESEARCH ARTICLE


Shale Gas Productivity Predicting Model and Analysis of Influence Factors



Yin Daiyin, Wang Dongqi*, Zhang Chengli, Duan Yingjiao
Northeast Petroleum University, Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Daqing, P.R. China.


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© 2015 Chengli et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: * Address correspondence to this author at the Northeast Petroleum University, Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education, Daqing, P.R. China.


Abstract

In order to find the dynamic characteristics of shale gas reservoirs and improve shale gas well production, it is very important to research on shale gas seepage mechanism and production evaluation. Based on the shale gas seepage mechanism, adsorption and desorption characteristics, the diffusion mechanism and mass conservation theory in shale gas development, the dual pore medium shale gas reservoir mathematical model is set up. The mathematical model is built by the finite difference method based on start-up pressure gradient, slippage effect and the isothermal adsorption principle, and then programmed to solve it. Finally, this paper analyzed the impact of Langmuir volume, Langmuir pressure, start-up pressure gradient and slippage coefficient and other factors on shale gas wells production.

Keywords: Influence factors, Seepage mechanism, Shale gas, Slippage effect, Start-up pressure gradient.