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低渗透页岩
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     The results show that excess pore pressure is induced in this process due to the higher thermal expansion of fluid in low permeability shale,which may lead to the development of tensile effective stress and fracturing or failure of structure.
     结果表明,由于低渗透页岩地层流体高温膨胀导致的超高孔隙压力,有可能产生拉张应力,严重时会导致地层破裂。
短句来源
     The numerical results show that excess pore pressure around cased well reaches 13.8 MPa when the heating rate reaches 46.82 ℃/d. Thereby the effective stress near the well approaches the maximum value of radial stress with 14 MPa,tangential stress with 9 MPa,respectively.
     数值结果表明,当井筒加热速率为46.82℃/d时,低渗透页岩地层的最高超孔隙压力达13.8 MPa,相应的页岩层径向有效应力和周向有效应力分别达到了14 MPa和9 MPa。
短句来源
     Due to the higher thermal expansion of fluid in low permeability shale, the super pore pressure may lead to the development of effective tensile stress and even formation fracturing.
     由于低渗透页岩地层流体高温膨胀导致的超孔隙压力,有可能产生有效拉张应力,严重时会导致地层破裂。
短句来源
  相似匹配句对
     shale--limestone;
     页岩—灰岩型;
短句来源
     Changshun Shale;
     长顺页岩;
短句来源
     Characteristics of displacement in low permeability reservoir
     低渗透储层驱替特征
短句来源
     BRIEF INTRODUCTION TO LOW PERMEABILITY OILFIELD DEVELOPMENT
     低渗透油田开发概论
短句来源
     The recovery ration of hot roll test using Meg and BST-1 was 3.7 times that of the amphoteric polymers.
     结果表明,优选出的甲基葡萄糖苷-超低渗透钻井液具有强的页岩抑制能力,钻屑回收率是两性离子聚合物钻井液的3.7倍;
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Based on the continuum mechanics theory,a coupled thermal structural-hydraulic-mechanics model is presented in this paper.A Galerkin finite element method based on the fully implicit and sequential iterative algorithm is used to simulate the thermal-hydraulic-mechanical process around the injection well.A case study is given.The results show that excess pore pressure is induced in this process due to the higher thermal expansion of fluid in low permeability shale,which may lead to the development of tensile...

Based on the continuum mechanics theory,a coupled thermal structural-hydraulic-mechanics model is presented in this paper.A Galerkin finite element method based on the fully implicit and sequential iterative algorithm is used to simulate the thermal-hydraulic-mechanical process around the injection well.A case study is given.The results show that excess pore pressure is induced in this process due to the higher thermal expansion of fluid in low permeability shale,which may lead to the development of tensile effective stress and fracturing or failure of structure.

该文应用连续介质力学理论建立了与蒸汽注入过程相关的热-流-变形耦合问题的基本数学模型;应用全隐式顺序Galerkin有限元数值解方案,对注蒸汽井的热-流体-变形耦合过程进行了数值模拟。结果表明,由于低渗透页岩地层流体高温膨胀导致的超高孔隙压力,有可能产生拉张应力,严重时会导致地层破裂。

Based on the continuum mechanics theory,a coupled thermal-hydraulic-mechanical model corresponding to excess pore pressure and effective stress of thermal well under steam injection,was presented.In order to derive an effective numerical solution,a Galerkin finite element method with fully implicit and sequential iterative algorithm was adopted to design related computer codes.The numerical results show that excess pore pressure around cased well reaches 13.8 MPa when the heating rate reaches 46.82 ℃/d.Thereby...

Based on the continuum mechanics theory,a coupled thermal-hydraulic-mechanical model corresponding to excess pore pressure and effective stress of thermal well under steam injection,was presented.In order to derive an effective numerical solution,a Galerkin finite element method with fully implicit and sequential iterative algorithm was adopted to design related computer codes.The numerical results show that excess pore pressure around cased well reaches 13.8 MPa when the heating rate reaches 46.82 ℃/d.Thereby the effective stress near the well approaches the maximum value of radial stress with 14 MPa,tangential stress with 9 MPa,respectively.Therefore,an optimum programming for warming time or heating rate in steam injection should include various factors such as thermal-hydraulic response,in-situ stress and the strength of casing structure.

基于连续介质力学理论,建立了热采蒸汽注入过程中地层超孔隙压力和有效应力定量评价的热流变形耦合数学模型,应用Galerkin有限元全隐式顺序迭代方案,建立了求解该类复杂耦合模型的有效数值解法。数值结果表明,当井筒加热速率为46.82℃/d时,低渗透页岩地层的最高超孔隙压力达13.8 MPa,相应的页岩层径向有效应力和周向有效应力分别达到了14 MPa和9 MPa。因此,设计注入蒸汽加热速率的最佳方案应综合考虑页岩的热流动力反应、地应力水平和套管强度等因素。

Based on the continuous medium mechanics theory, a basic mathematical model of coupled thermal - hydraulic - deformation related to steam injection process is built. A finite element method with fully implicit and sequential iterative algorithm is used to compute this complicated model. Some numerical results of borehole thermal stress and super pore pressure are gained. The results show that the super pore pressure at borehole area caused by the temperature will reach to 15MPa at 300℃ injected steam temperature....

Based on the continuous medium mechanics theory, a basic mathematical model of coupled thermal - hydraulic - deformation related to steam injection process is built. A finite element method with fully implicit and sequential iterative algorithm is used to compute this complicated model. Some numerical results of borehole thermal stress and super pore pressure are gained. The results show that the super pore pressure at borehole area caused by the temperature will reach to 15MPa at 300℃ injected steam temperature. Due to the higher thermal expansion of fluid in low permeability shale, the super pore pressure may lead to the development of effective tensile stress and even formation fracturing.

应用连续介质力学理论,建立了与蒸汽注入过程相关的热-流-变形耦合问题的基本数学模型;应用全隐式顺序有限元数值解方法,对该数学模型进行了求解,获得了井眼热应力与超孔隙地层压力的部分数值结果。结果表明,在300℃注入蒸汽温度情况下,由温度变化引起的井眼区域超孔隙压力可以达到15MPa的水平。由于低渗透页岩地层流体高温膨胀导致的超孔隙压力,有可能产生有效拉张应力,严重时会导致地层破裂。

 
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