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research-article

A Reservoir/Wellbore Coupling Model for Heterogeneous Naturally Fractured Gas Reservoirs

[+] Author and Article Information
Yongsheng Tan

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
tanyongsheng2012@163.com

Haitao Li

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
lihaitao@swpu.edu.cn

Xiang Zhou

Petroleum Systems Engineering, Faculty of Engineering and Applied Science, University of Regina, Saskatchewan S4S 0A2, Canada
zhou326x@gmail.com

Beibei Jiang

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
jiangboy1984@126.com

Yongqing Wang

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
13880551867@163.com

Nan Zhang

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China
zhangnan87723@126.com

1Corresponding author.

ASME doi:10.1115/1.4040201 History: Received June 03, 2017; Revised May 03, 2018

Abstract

Numerical simulation and prediction studies on horizontal well performances in gas reservoir, are foundation for optimizing horizontal well completion process. To gain more understandings on this theory, a steady-state reservoir model, coupling with wellbore is developed in the fractured gas reservoirs with bottom-water and different fracture intensity, to predict the horizontal well performances. Based on the equivalent flow assumption, the fractured porous medium is transformed into anisotropic porous medium. So that, the gas reservoir flow model can be developed as a new model that incorporates formation permeability heterogeneity, reservoir anisotropy, and gas reservoir damage. The wellbore flow model, which considers pressure drops in the tubing is applied. We compare this paper model solutions for inflow profile along the well to the numerical solutions obtained from a commercial simulator (ECLIPSE 2011), and the result shows a very good agreement. Moreover, sensitive analysis, in terms of various linear densities of fractures, matrix permeability, fracture width, and wellbore pressure drop are implemented. The results shows that, the new model developed in this study can obtain a more practical representation to simulate the horizontal wells performance in fractured gas reservoir with different fracture intensity and bottom-water, thus can be used to optimize the parameters in horizontal well completion of fractured gas reservoirs with different fracture intensity and bottom-water.

Copyright (c) 2018 by ASME
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