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首页> 外文会议>Geothermal Resources Council Annual Meeting >Fracture Characterization by Using Resonance of Penny-Shaped Fluid-Filled Crack Model in the Higashi-Hachimantai Field, Japan
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Fracture Characterization by Using Resonance of Penny-Shaped Fluid-Filled Crack Model in the Higashi-Hachimantai Field, Japan

机译：利用日本Higashi-Hachimantai领域的便士形填充裂缝模型共振的裂缝特征

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Fracture characterization was attempted by the use of crack waves which were detected in the Higashi-Hachimantai geothermal model field, Japan. For the characterization, field data observed during drilling a well near the target crack were used. Characterization method was constructed based on the dynamics of a penny shaped crack filled with fluid. By the use of this characterization method, it is possible to estimate crack aperture, radius and interfacial stiffness due to partial contact between upper and lower crack surfaces. These factors are estimated by comparing peak frequencies detected from field data with eigen frequencies suggested by the crack model. The magnitude of the factors is dependent on reservoir pressure or wellhead pressure of one of the observatory wells. For example, crack aperture is around 0.3mm in the case that the wellhead pressure is lower than 2MPa and aperture is around 0.5mm in the case that the wellhead pressure is higher than 2MPa.
机译：通过使用在日本的Higashi-Hachimantai地热模型领域检测到的裂纹试图裂缝表征。为了表征，使用在钻孔附近靠近目标裂缝期间观察到的现场数据。基于填充有流体的便士形裂缝的动态构建特征方法。通过使用该表征方法，由于上下裂缝表面之间的部分接触，可以估计裂缝孔径，半径和界面刚度。通过比较从裂缝模型建议的特征频率检测到的现场数据检测到的峰值频率来估计这些因素。因素的幅度取决于一个天文台孔的储层压力或井口压力。例如，在井口压力低于2MPa的情况下，裂纹孔径约为0.3mm，并且在井口压力高于2MPa的情况下，孔径约为0.5mm。

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