US 12,487,075 B2
Characterizing rock properties with optical energy sources in a wellbore
Damian Pablo San Roman Alerigi, Al Khobar (SA); Safiyah Alghamdi, Dhahran (SA); and Sameeh Batarseh, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Apr. 18, 2024, as Appl. No. 18/639,393.
Prior Publication US 2025/0327656 A1, Oct. 23, 2025
Int. Cl. G01B 11/02 (2006.01); E21B 49/00 (2006.01); G01B 9/02 (2022.01); G01B 11/30 (2006.01); G01V 8/02 (2006.01)
CPC G01B 11/026 (2013.01) [E21B 49/006 (2013.01); G01B 9/02094 (2013.01); G01B 11/303 (2013.01); G01V 8/02 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A downhole tool system, comprising:
a bottom hole assembly, comprising:
a connector configured to couple to a downhole conveyance run into a wellbore from a terranean surface to a reservoir rock formation;
a laser head configured to emit a laser beam toward the reservoir rock formation at a fixed frequency;
at least one light source emitter configured to emit a light beam toward the reservoir rock formation; and
a sensing assembly comprising at least one optical receiver configured to (1) receive a reflected laser beam from the reservoir rock formation and a reflected light beam from the reservoir rock formation, and (2) interfere the reflected laser beam with the reflected light beam; and
a controller communicably coupled to the sensing assembly and configured to perform operations comprising:
generating at least one speckle interferogram based on the interference between the reflected laser beam and the reflected light beam; and
determining an angular displacement and an axial displacement of the wellbore based on the at least one speckle interferogram.