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

A novel fully-coupled flow and geomechanics model in enhanced geothermal reservoirs
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强化地热储层中新型全耦合流动和地质力学模型

DOI:
10.1016/j.petrol.2013.04.005
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发表时间:
2013-07
影响因子:
4.4
通讯作者:
Fakcharoenphol P
Fakcharoenphol P
中科院分区:
地球科学2区
文献类型:
--
作者:
Hu LT;Winterfeld PH;Wu YS;Fakcharoenphol P

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多孔介质的地质力学行为在应力敏感性油藏中变得越来越重要。本文提出了一种新的流体流动-地质力学完全耦合模型(TOUGH 2-EGS)。我们的模型的流体流动部分是基于通用数值模拟器TOUGH 2-EOS 3。地质力学部分是从线弹性理论的热-孔隙-弹性系统使用Navier方程。流体流动和地质力学是完全耦合的,并使用积分有限差分法求解流动和应力方程。此外,孔隙度和渗透率取决于有效应力和相关性描述的依赖性被纳入模拟器。TOUGH 2-EGS针对温度引起的变形和压力引起的流动和变形的解析解进行了验证。最后,将该模型应用于地热田的压力和温度变化和变形分析。结果表明,该模型可用于考虑流体流动和地质力学效应的油田规模油藏模拟。
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.
DOI: 10.2118/5529-pa
发表时间: 1976-09
期刊: Journal of Petroleum Technology
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