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双重孔隙介质非线性流固耦合渗流 总被引:4,自引:0,他引:4
本文给出了考虑双孔双涌介质生变形的流固耦合渗流模型。不仅考虑了固结对渗流的影响,同时也考虎了固体变形对渗流参数(孔隙度和渗透率)的影响。这样。渗流就成了双孔双渗介质中非线性流固耦合渗流。在此基础上,本文还推导了双重孔隙介质非线性流固耦合渗流计算。给出了算例并作了对比。结果表明,固体变形引起的介质参数变化对流体渗流早中期过程有重要的影响,对渗流后期影响并不大。这对于石油开采有重要的参考价值。 相似文献
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Totally fissured media in which the individual cells are isolated by the fissure system are effectively described by double porosity models with microstructure. Such models contain the geometry of the individual cells in the medium and the flux across their interface with the fissure system which surrounds them. We extend these results to a dual-permeability model which accounts for the secondary flux arising from direct cell-to-cell diffusion within the solid matrix. Homogenization techniques are used to construct a new macroscopic model for the flow of a single phase compressible fluid through a partially fissured medium from an exact but highly singular microscopic model, and it is shown that this macroscopic model is mathematically well posed. Preliminary numerical experiments illustrate differences in the behaviour of solutions to the partially fissured from that of the totally fissured case. 相似文献
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裂缝性油藏流固耦合渗流 总被引:12,自引:0,他引:12
本文给出了考虑介质变形的双重孔隙介质流固耦合渗流模型,并考虑渗流参数随有效应力而变化的非线性双重孔隙介质流固耦合渗流,在此基础上,本文还推导了双重孔隙介质非线性系数非线性等流固耦合流流计算,并给出了算例。 相似文献
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The reflection and transmission of an incident plane wave at an interface between water and a fluid-saturated double porosity
solid are investigated. The properties of the three compressional waves and one shear wave in double porosity media are discussed
in detail. The effect of the viscosity, permeability, and porosity on the phase velocity and attenuation of four bulk waves
is presented. Comparison between the double porosity theory and the Biot theory reveals that there exists obvious difference
in the phase velocity, attenuation and the reflection and transmission coefficients. Two cases of boundary conditions, i.e.,
the sealed-pore and the open-pore boundaries, are introduced in the numerical calculation. At last, the effect of the fracture
permeability and porosity on the reflection and transmission coefficients considered. It is revealed that the amplitudes of
the reflected and transmitted waves strongly depend the boundary condition, fracture permeability, and porosity. 相似文献
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Reflection and Transmission of Elastic Waves from the Interface of a Fluid-saturated Porous Solid and a Double Porosity Solid 总被引:1,自引:0,他引:1
The reflection and transmission characteristics of an incident plane P1 wave from the interface of a fluid-saturated single porous solid and a fluid-saturated double porosity solid are investigated.
The fluid-saturated porous solid is modeled with the classic Biot’s theory and the double porosity medium is described by
an extended Biot’s theory. In a double-porosity model with dual-permeability there exist three compressional waves and a shear
wave. The effects of the incident angle and frequency on amplitude ratios of the reflected and transmitted waves to the incident
wave are discussed. Two boundary conditions are discussed in detail: (a) Open-pore boundary and (b) Sealed-pore boundary.
Numerical results reveal that the characteristics of the reflection and transmission coefficients to the incident angle and
the frequency are quite different for the two cases of boundary conditions. Properties of the bulk waves existing in the fluid-saturated
porous solid and the double porosity medium are also studied. 相似文献
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岩体系统渗流场与应力场耦合的广义双重介质模型的应用研究 总被引:3,自引:0,他引:3
本文通过实验资料分析, 提出了裂隙岩体应力与渗流之间的分形几何关系式。以研究区岩体系统结构为基础, 提出了岩体系统应力场与渗流场耦合的广义双重介质模型, 并将该模型应用于某水利水电工程的渗流与控制中, 对坝区岩体进行了应力场和渗流场的耦合分析, 取得了比较满意的结果。 相似文献
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Effective stress laws for multi-porosity media 总被引:2,自引:0,他引:2
Theconceptofeffectivestressisveryusefultodescribetheeffectofporefluidpressureonthemechanicalresponseofporousmedia.Terzaghifoundthefollowingfacts:1)Iftheexternalstaticpressuresσ1=σ2=σ3andtheporepressureincreasethesameamountwiththepressures,thevolumeof… 相似文献
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川藏公路地质环境与整治改建方案的思考 总被引:3,自引:1,他引:3
川藏公路由于地质环境复杂、建设标准低、后遗病害多,抗灾能力差,泥石流、滑坡、山崩、雪害、水毁等自然灾害频繁发生,公路阻车断道严重。国家投入巨资进行整治改建,并取得了明显的效果,但由于自然环境特殊、影响因素复杂,许多特大型、大型工程地质病害问题还没有可行、可靠的解决方案。本文通过分析川藏公路沿线的地质环境和灾害特点,总结历年整治改建和经验的教训,提出川藏公路建设的途径、可能达到的目标和应采用的原则。 相似文献