US 11,668,850 B2
Nuclear magnetic resonance data acquisition system
Nicholas Heaton, Cambridge (GB)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Apr. 4, 2022, as Appl. No. 17/657,785.
Application 17/657,785 is a continuation of application No. 16/976,199, granted, now 11,294,093, previously published as PCT/US2019/020177, filed on Mar. 1, 2019.
Claims priority of provisional application 62/636,964, filed on Mar. 1, 2018.
Prior Publication US 2022/0229203 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01V 3/32 (2006.01); G01R 33/44 (2006.01); E21B 47/12 (2012.01)
CPC G01V 3/32 (2013.01) [E21B 47/12 (2013.01); G01R 33/448 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
controlling radio frequency emission circuitry of a nuclear magnetic resonance unit to emit radio frequency energy in at least first and second sequences, the first sequence comprising a phase alternating paired (PAP) sequence including a first wait time between an even number of sequence repeats with an equal number of positive and negative phases, the second sequence comprising a non-phase alternating paired (non-PAP) sequence including a second wait time for a single sequence repeat with a single phase; and
acquiring, via antenna circuitry and analog-to-digital conversion circuitry, nuclear magnetic resonance echoes as digital echo data during and responsive to each of the first and second sequences.