US 11,747,506 B2
Dual range micro-resistivity measurement method
Youssef Boulaknadal, Houston, TX (US); Stanislav Forgang, Houston, TX (US); and Peter Withers, Hook (GB)
Assigned to BAKER HUGHES OILFIELD OPERATIONS LLC, Houston, TX (US)
Filed by Youssef Boulaknadal, Houston, TX (US); Stanislav Forgang, Houston, TX (US); and Peter Withers, Hook (GB)
Filed on Aug. 3, 2021, as Appl. No. 17/392,851.
Prior Publication US 2023/0037403 A1, Feb. 9, 2023
Int. Cl. G01V 3/24 (2006.01); G01V 3/28 (2006.01); G01V 3/38 (2006.01); E21B 49/00 (2006.01)
CPC G01V 3/24 (2013.01) [G01V 3/28 (2013.01); G01V 3/38 (2013.01); E21B 49/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of operating a resistivity imaging device in a wellbore, comprising:
measuring an impedance of a formation surrounding the wellbore;
configuring a circuit of the resistivity imaging device into one of a first circuit configuration for operating the resistivity imaging device in a first mode and a second circuit configuration for operating the resistivity imaging device in a second mode, based on the impedance of the formation,
wherein the circuit further comprises a first switch and a second switch and configuring the circuit into the first circuit configuration comprises closing the first switch and opening the second switch to place a button electrode of the resistivity imaging device at a reference voltage and a plate electrode of the resistivity imaging device at ground and configuring the circuit into the second circuit configuration further comprises opening the first switch and closing the second switch to place the button electrode at ground and the plate electrode at the reference voltage; and
operating the resistivity imaging device using the circuit in the one of the first circuit configuration and the second circuit configuration.