基于非结构化有限元的三维井地电阻率法约束反演

王智, 王程, 方思南

Constraint inversion of three-dimensional borehole-to-surface resistivity based on unstructured finite element

WANG Zhi, WANG Cheng, FANG Si-Nan

图6 三维反演结果 a—传统电阻率反演结果z=-7 m处xoy切片;b—传统电阻率反演结果y=25 m处xoz切片;c—施加不等式约束的反演结果z=-7 m处xoy切片;d—施加不等式约束的反演结果y=25 m处xoz切片;e—传统电阻率反演结果的三维剖面(电阻率小于50 Ω · m);f—施加不等式约束反演结果的三维剖面(电阻率小于50 Ω · m)

Fig.6 3D inversion results a—traditional resistivity inversion results:horizontal slice xoy at z=-7 m; b—traditional resistivity inversion results:cross-section slice xoz at y=25 m; c—inversion results with inequality constraints:horizontal slice xoy at =-7 m; d—inversion results with inequality constraints:cross-section slice xoz at y=25 m; e—3D view of traditional resistivity inversion results(resistivity is less than 50 Ω · m); f—3D view of inversion results with inequality constraints(resistivity is less than 50 Ω · m)