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首页> 外文会议>Proceedings of the 4th International Symposium-multi-field Coupling Theory of Rock and Soil Media and its Applications >The Finite Element Analysis of Stress-Seepage-Temperature Three Field Coupling of Thermal Recovery Well in Heavy Oil Reservoir
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The Finite Element Analysis of Stress-Seepage-Temperature Three Field Coupling of Thermal Recovery Well in Heavy Oil Reservoir

机译：稠油油藏热采井应力-渗流-温度三场耦合的有限元分析

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In the oil and gas extraction process, especially in the high-pressure water or heavy oil thermal recovery processes, reservoir pressure and temperature are constantly changing, which results to the deformation of porous medium, and the reservoir deformation would affect the variations of reservoir pressure and temperature.The interaction between the fluid flow of reservoir pore, temperature changes and the rock deformation is called the seepage-stress-temperature three coupling problem.Put the rock mechanics, heat transfer, fluid mechanics, petroleum engineering and reservoir physics together, establish the temperature, seepage and stress fields coupling theory mode.Take thermal recovery wells for example with finite element analysis, studied the law of stress-strain variation with time and space and the law of dynamic variation of petrophysical parameters.The results showed that: the closer from the wellhole, the more significant changes in rock strain, porosity, permeability, compression factor of porosity and other physical parameters;the farther away from the wellhole, the change is less obvious.The change of physical parameters under the coupling condition is smaller than the uncoupled condition.The oil production under the coupling condition is less than the uncoupled condition, which is mainly due to the fluid-solid-thermal coupling effect.The seepage resistance is increasing when fluid flows through rocks, which makes oil production decreased.The establishment of this model gives the theoretical basis for analyses of numerical simulation of thermal recovery, the ground thermal recovery wellbore stability and subsidence caused by mining.
机译：在油气开采过程中，特别是在高压水或重油热采过程中，储层压力和温度不断变化，导致多孔介质变形，储层变形会影响储层压力的变化。储层孔隙流体流动，温度变化与岩石变形之间的相互作用称为渗流-应力-温度三个耦合问题。将岩石力学，传热，流体力学，石油工程和储层物理学放在一起，建立以温度，渗流和应力场的耦合理论模式为例。以热采井为例，进行了有限元分析，研究了应力应变随时间和空间的变化规律，以及岩石物性参数的动态变化规律。离井眼越近，岩石应变，孔隙率，渗透率，压实度的变化就越大。孔隙率和其他物理参数的分解系数;离井眼越远，变化越不明显;耦合条件下的物理参数变化小于非耦合条件;耦合条件下的产油量小于非耦合条件该条件的建立主要是由于流体固热耦合作用。当流体流经岩石时渗流阻力增大，致使采油量下降。该模型的建立为热采数值模拟分析提供了理论依据。 ，地表热采井筒的稳定性和开采引起的沉陷。

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