A THREE DIMENSINAL ELASTOPLASTIC FINITE ELEMENT MODEL FOR PREDICTING DYNAMICALLY RESERVOIR EFFECTIVE STRESS
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摘要: 本文根据油藏应力与渗流相互作用的耦合机理,建立了一个用于油藏有效应力动态预测的三维弹塑性模型。该模型强调了油藏在注采交变载荷作用下应力与渗流的力学耦合效应,以及油藏岩石弹塑性变形的力学特性,并采用弹塑性增量有限元法求解,最后给出了算例.Abstract: A three dimensinal elastoplastic model for predicting dynamically reservoir effective stress is established based on the coupled interaction mechanism of reservoir stress and multiphase fluid flow.The model is characteristic of two important aspects:the coupled effect of stress and seepage,and the elastoplastic properties of reservoir rocks under alternative loads of injection and production.The model is solved using elastoplastic incremental finite element method and an example is given.
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Key words:
- effective stress /
- elastoplastic deformation /
- seepage /
- coupled effect /
- dynamical prediction /
- finite element
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