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首页> 外文期刊>日本機械学会論文集. A編 >Effect of Fluid Viscosity, Permeability of Rock and Crack Interfacial Stiffness on Dynamic Response of a Geothermal Reservoir Crack (Two-Dimensional Crack Model)
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Effect of Fluid Viscosity, Permeability of Rock and Crack Interfacial Stiffness on Dynamic Response of a Geothermal Reservoir Crack (Two-Dimensional Crack Model)

机译：流体粘度，岩石渗透率和裂缝界面刚度对地热储层裂缝动力响应的影响（二维裂缝模型）

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摘要

In order to clarify the dynamic response of a fluid-filled crack in the earth's crust, dynamic elastic response of a two-dimensional fluid-filled crack is studied, emphasizing the effect of fluid viscosity, permeability of rock and the stiffness due to contact between the asperities on the upper and lower surfaces of the crack. It is revealed that the eigen angular frequencies normalized by C_T/a(C_T: S wave phase velocity, a: half crack length) are governed primarily by the crack interfacial stiffness. The aspect ratio, i. e., the ratio of the crack length to the initial aperture of the crack, has only weak effects on the normalized eigen angular frequencies except for the case of a crack that is completely open initially. For larger crack interfacial stiffness, attenuation is stronger. It is also revealed that, for larger crack interfacial stiffness, the normalized eigen angular frequencies become smaller with permeability and attenuation becomes stronger with permeability. When crack interfacial stiffness is absent, permeability has weak effect on the normalized eigen angular frequencies and intensity of attenuation.
机译：为了阐明地壳中充满流体的裂缝的动力响应，研究了二维充满流体的裂缝的动态弹性响应，强调了流体粘度，岩石渗透率和由于接触引起的刚度的影响。裂纹的上下表面的凹凸。结果表明，以C_T / a（C_T：S波相速度，a：半裂纹长度）归一化的本征角频率主要由裂纹界面刚度决定。长宽比，即例如，裂纹的长度与裂纹的初始孔径之比，除了裂纹最初完全打开的情况外，对归一化的本征角频率仅具有微弱的影响。对于较大的裂纹界面刚度，衰减更大。还显示出，对于较大的裂纹界面刚度，归一化的本征角频率随渗透率而变小，而衰减随渗透率而变强。当没有裂纹界面刚度时，渗透率对归一化特征角频率和衰减强度的影响很小。

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