- Patent Title: Hybrid amplitude adjustment algorithm for resistivity logging tools
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Application No.: US15032213Application Date: 2013-12-30
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Publication No.: US09772424B2Publication Date: 2017-09-26
- Inventor: Qi Cao , Chi Wei Lim , Alberto Quintero , William J. Schaecher
- Applicant: Halliburton Energy Services, Inc.
- Applicant Address: US TX Houston
- Assignee: Halliburton Energy Services, Inc.
- Current Assignee: Halliburton Energy Services, Inc.
- Current Assignee Address: US TX Houston
- Agency: Kilpatrick Townsend & Stockton LLP
- International Application: PCT/US2013/078347 WO 20131230
- International Announcement: WO2015/102583 WO 20150709
- Main IPC: G01V3/00
- IPC: G01V3/00 ; G01V3/08 ; G01V3/18 ; G01V3/20 ; G01V3/34 ; G01V3/40

Abstract:
In one aspect, a resistivity logging tool for a fluid-producing formation if provided. The resistivity logging tool includes at least one transmitter device connected to at least one excitation electrode, multiple receiver devices respectively connected to monitoring electrodes, and a controller. The transmitter can inject an excitation current into the formation via the excitation electrode. Each receiver device can determine a respective voltage level induced by the excitation current. The controller can determine whether a voltage level measured by at least one receiver device is within a specified range. Based on the measured voltage level, the controller can select a global amplitude adjustment algorithm for modifying excitation currents or a localized amplitude adjustment algorithm for modifying one or more gains of one or more receiver devices. The controller can modify the excitation current or gains by executing the selected algorithm.
Public/Granted literature
- US20160274261A1 HYBRID AMMPLITUDE ADJUSTMENT ALGORITHM FOR RESISTIVITY LOGGING TOOLS Public/Granted day:2016-09-22
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