发明申请
- 专利标题: DIRECTIONAL RESISTIVITY MEASUREMENT FOR WELL PLACEMENT AND FORMATION EVALUATION
- 专利标题(中): 方向电阻测量,用于井架和地层评估
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申请号: US13030780申请日: 2011-02-18
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公开(公告)号: US20110238312A1公开(公告)日: 2011-09-29
- 发明人: Jean Seydoux , Dzevat Omeragic , Dean M. Homan
- 申请人: Jean Seydoux , Dzevat Omeragic , Dean M. Homan
- 主分类号: G06F19/00
- IPC分类号: G06F19/00 ; G01V3/08
摘要:
The present disclosure relates to a method to determine a formation property of a subsurface formation. A downhole logging tool having two or more antennas, at least two of the antennas having a transversely-sensitive element and an axially-sensitive element is provided. Azimuthally-sensitive measurements are obtained using the antennas of the downhole logging tool. The measurements are fitted to a Fourier series having Fourier coefficients that include channel gains, if any. A DC component, a first harmonic component, and a second harmonic component are determined from the Fourier series, a measurement type is determined using the DC component, the first harmonic component, and/or the second harmonic component, and the formation property of the subsurface formation is determined using the determined measurement type.