A novel fully-coupled flow and geomechanics model in enhanced geothermal reservoirs

被引：77
作者：
Hu, Litang [1 ,2 ]
Winterfeld, Philip H. [2 ]
Fakcharoenphol, Perapon [2 ]
Wu, Yu-Shu [2 ]
机构：
[1] Beijing Normal Univ, Coll Water Sci, Engn Res Ctr Groundwater Pollut Control & Remedia, Minist Educ, Beijing 100875, Peoples R China
[2] Colorado Sch Mines, Dept Petr Engn, Golden, CO 80401 USA
来源：
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING | 2013年 / 107卷
关键词：
stress-sensitive formation; thermo-elasticity; enhanced geothermal systems (EGS); geothermal reservoir simulation; coupled thermal; hydrologic; mechanical (THM) model; FLUID-FLOW; SIMULATION; INJECTION; GEYSERS; FIELD; DEFORMATION; SEISMICITY; SUBSIDENCE; CALIFORNIA;
D O I：
10.1016/j.petrol.2013.04.005
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The geomechanical behavior of porous media has become increasingly important in stress-sensitive reservoirs. This paper presents a novel fully-coupled fluid flow-geomechanical model (TOUGH2-EGS). The fluid flow portion of our model is based on the general-purpose numerical simulator TOUGH2-EOS3. The geomechanical portion is developed from linear elastic theory for a thermo-poro-elastic system using the Navier equation. Fluid flow and geomechanics are fully coupled, and the integral finite-difference method is used to solve the flow and stress equations. In addition, porosity and permeability depend on effective stress and correlations describing that dependence are incorporated into the simulator. TOUGH2-EGS is verified against analytical solutions for temperature-induced deformation and pressure-induced flow and deformation. Finally the model is applied to analyze pressure and temperature changes and deformation at The Geysers geothermal field. The results demonstrate that the model can be used for field-scale reservoir simulation with fluid flow and geomechanical effects. (C) 2013 Elsevier B.V. All rights reserved.
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页码：1 / 11
页数：11
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