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US 10,895,659 B2Granted
Detecting nuclear magnetic resonance logging tool motion
AssigneeHalliburton Energy Services, Inc.
InventorsArcady Reiderman, Songhua Chen, Mark Cheiron Butler
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Abstract
Methods, devices, and systems for tracking lateral motion of a nuclear magnetic resonance (NMR) tool are disclosed. In some embodiments, a phase shift for one or more spin-echo signals received by the NMR tool is detected during a velocity measurement sequence that corresponds to at least one formation measurement sequence. A lateral velocity of the NMR tool is determined based, at least in part, on the detected phase shift.
Claims19
A method comprising:
- generating a velocity measurement pulse sequence and at least one corresponding formation measurement pulse sequence;
- detecting a phase shift for one or more spin-echo signals received by a nuclear magnetic resonance (NMR) tool during the velocity measurement pulse sequence;
- and
- determining a lateral velocity of the NMR tool based, at least in part, on the detected phase shift.
1 more element
An apparatus comprising:
- a nuclear magnetic resonance (NMR) tool comprising a quadrature detector configured to,
- generate a velocity measurement pulse sequence and at least one corresponding formation measurement pulse sequence;
- and
- detect a phase shift for one or more spin-echo signals received during the velocity measurement sequence that;
- and
- a measurement processing system comprising:
- a processor;
- and
- a machine-readable medium having program code executable by the processor to cause the apparatus to determine a lateral velocity of the NMR tool based, at least in part, on the detected phase shift.
6 more elements
Dependencies are inferred from the claim text.