US 12,386,095 B2
Determining formation conductivity with propagation measurements
Gong Li Wang, Sugar Land, TX (US); and Dean Homan, Damon, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 17/995,209
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Mar. 30, 2021, PCT No. PCT/US2021/024949
§ 371(c)(1), (2) Date Sep. 30, 2022,
PCT Pub. No. WO2021/202572, PCT Pub. Date Oct. 7, 2021.
Claims priority of provisional application 63/002,945, filed on Mar. 31, 2020.
Prior Publication US 2023/0184987 A1, Jun. 15, 2023
Int. Cl. G01V 3/38 (2006.01); E21B 49/00 (2006.01); G01V 3/28 (2006.01)
CPC G01V 3/38 (2013.01) [E21B 49/00 (2013.01); G01V 3/28 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
acquiring, via a processor, propagation measurements in a wellbore through a geological formation using one or more propagation well logging tools having at least two receivers;
converting, via the processor, the propagation measurements to an apparent conductivity without inverting the propagation measurements, the converting based at least in part on:
an operating frequency associated with the propagation measurements;
a relative longitudinal position of the at least two receivers; and
a phase shift measurement, an attenuation measurement, or both the phase shift measurement and the attenuation measurement, associated with the propagation measurements; and
generating, via the processor, a well log based at least in part on the apparent conductivity.