Invention Grant
- Patent Title: Triaxial antenna electromagnetic measurements
- Patent Title (中): 三轴天线电磁测量
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Application No.: US12975664Application Date: 2010-12-22
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Publication No.: US08417455B2Publication Date: 2013-04-09
- Inventor: Lili Zhong , Qiming Li
- Applicant: Lili Zhong , Qiming Li
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent Kenneth Liu; Darla Fonseca
- Main IPC: G01V1/40
- IPC: G01V1/40 ; G01V3/00

Abstract:
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 one of the antennas being a non-co-located triaxial antenna, 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 and the non-co-location of the triaxial antenna is compensated for by adjusting the Fourier coefficients. Compensated measurements are determined using the adjusted Fourier coefficients and the formation property of the subsurface formation is determined using the compensated measurements. The compensating may use one or more scale factors that depend on an amplitude, phase, and/or frequency of the received signal, and an alignment angle between the triaxial antenna and another of the antennas of the logging tool.
Public/Granted literature
- US20120166086A1 TRIAXIAL ANTENNA ELECTROMAGNETIC MEASUREMENTS Public/Granted day:2012-06-28
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