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首页> 外文会议>Geothermal Resources Council annual meeting >Imaging Fracture Zones at Eleven-Mile Canyon Using Anisotropic Least-Squares Reverse-Time Migration
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Imaging Fracture Zones at Eleven-Mile Canyon Using Anisotropic Least-Squares Reverse-Time Migration

机译：利用各向异性最小二乘逆时偏移成像对11英里峡谷的断裂带成像

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Accurate imaging of fracture zones is crucial for geothermal energy exploration. Fracture zones and most geologic formations behave as anisotropic media for seismic-wave propagation. Properly accounting for subsurface anisotropic properties is essential for high-resolution imaging of fracture/fault zones for geothermal exploration. We develop a novel anisotropic least-squares reverse-time migration method for reliable imaging of fracture zones. The method employs an efficient implicit wavefield-separation scheme to reduce image artifacts and improve the image quality. We verify the capability of our new imaging method using synthetic data for a geophysical model of the Eleven-Mile Canyon site in Nevada containing several fracture/fault zones. We apply our new method to seismic data acquired along five 2D lines at Eleven-Mile Canyon for geothermal energy exploration. Our imaging results demonstrate that our new anisotropic least-squares reverse-time migration improves image resolution and reduces image artifacts.
机译：裂缝区的准确成像对于地热能勘探至关重要。断裂带和大多数地质构造均表现为地震波传播的各向异性介质。正确地解释地下各向异性对地热勘探裂缝/断层带的高分辨率成像至关重要。我们开发了一种新颖的各向异性最小二乘逆时偏移方法，用于对断裂带进行可靠的成像。该方法采用有效的隐式波场分离方案来减少图像伪像并提高图像质量。我们使用包含多个裂缝/断层带在内华达州十一英里峡谷站点的地球物理模型的合成数据，验证了我们新成像方法的功能。我们将新方法应用于沿着11英里峡谷的5条2D线采集的地震数据，以进行地热能勘探。我们的成像结果表明，我们新的各向异性最小二乘逆时偏移可提高图像分辨率并减少图像伪影。

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