Invention Grant
- Patent Title: Measurement of formation parameters using rotating directional EM antenna
- Patent Title (中): 使用旋转方向EM天线测量地层参数
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Application No.: US12136858Application Date: 2008-06-11
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Publication No.: US08193813B2Publication Date: 2012-06-05
- Inventor: Jean Seydoux , Reza Taherian
- Applicant: Jean Seydoux , Reza Taherian
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent Darla P. Fonseca; Brigitte J. Echols; Charlotte Rutherford
- Main IPC: G01V3/08
- IPC: G01V3/08 ; G01V3/30

Abstract:
A logging tool and method to make subsurface measurements is disclosed, wherein the tool is placed within a borehole penetrating a formation. The tool has a transmitter antenna and a receiver antenna spaced apart along a longitudinal axis of the tool, and at least one of the transmitter or receiver antennas has a dipole moment that is non-coaxial with the longitudinal axis of the tool. The at least one non-coaxial antenna can rotate relative to the other antenna. Energy is transmitted from the transmitter antenna and a signal associated with the transmitted energy is measured at the receiver antenna while the at least one non-coaxial antenna rotates relative to the other antenna.
Public/Granted literature
- US20090309600A1 MEASUREMENT OF FORMATION PARAMETERS USING ROTATING DIRECTIONAL EM ANTENNA Public/Granted day:2009-12-17
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