Invention Grant
- Patent Title: Selective saturation pulse for downhole measurements
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Application No.: US15768419Application Date: 2016-10-18
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Publication No.: US10473602B2Publication Date: 2019-11-12
- Inventor: Chang S. Shin , Mark Cheiron Butler
- Applicant: Halliburton Energy Services, Inc. , Chang S. Shin , Mark Cheiron Butler
- Applicant Address: US TX Houston
- Assignee: Halliburton Energy Services, Inc.
- Current Assignee: Halliburton Energy Services, Inc.
- Current Assignee Address: US TX Houston
- Agency: Haynes and Boone, LLP
- International Application: PCT/US2016/057517 WO 20161018
- International Announcement: WO2017/112055 WO 20170629
- Main IPC: G01N24/00
- IPC: G01N24/00 ; G01N24/08 ; G01R33/44 ; G01V3/32 ; E21B49/08 ; E21B47/12 ; G01R33/58

Abstract:
Various embodiments include a method for configuring and generating a non-adiabatic saturation pulse for use in nuclear magnetic resonance (NMR) logging. One such method configures the pulse by adjusting one or more of pulse amplitude modulation or phase cycling. The modified pulse is transmitted into a fluid such that a substantially uniform nuclear spin saturation or nuclear spin inversion echo response is received from the fluid. A wait time between the pulse transmission and the echo response that indicates that spin equilibrium has been achieved is substantially equal to a T1 time. The wait time is an indication of the characteristics of the fluid.
Public/Granted literature
- US20180321169A1 Selective Saturation Pulse For Downhole Measurements Public/Granted day:2018-11-08
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