US 11,921,249 B2
Ultrasonic acoustic sensors for measuring formation velocities
Hiroshi Hori, Clamart (FR); Evgeniya Deger, Sugar Land, TX (US); Tatsuaki Kamoi, Kanagawa-ken (JP); and Hiroshi Nakajima, Sugar Land, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 16/967,149
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Feb. 8, 2019, PCT No. PCT/US2019/017145
§ 371(c)(1), (2) Date Aug. 4, 2020,
PCT Pub. No. WO2019/157242, PCT Pub. Date Aug. 15, 2019.
Claims priority of provisional application 62/627,869, filed on Feb. 8, 2018.
Prior Publication US 2021/0055444 A1, Feb. 25, 2021
Int. Cl. G01V 1/50 (2006.01); E21B 49/00 (2006.01); G01V 1/46 (2006.01)
CPC G01V 1/50 (2013.01) [E21B 49/00 (2013.01); G01V 1/46 (2013.01); G01V 2210/1299 (2013.01); G01V 2210/1429 (2013.01); G01V 2210/6222 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A tool for measuring a formation velocity of a formation, the tool comprising:
a sensor to be disposed in the formation, the sensor including a first transmitter, a second transmitter, and a first receiver array carried by a housing, the first transmitter disposed at a first angle relative to the first receiver array and the second transmitter disposed at a second angle relative to the first receiver array; and
a processor to receive signal data from the sensor and determine a first wave propagation velocity of the formation based on signal data associated with the first transmitter and a second wave propagation velocity of the formation based on signal data associated with the second transmitter; and
wherein the processor is further configured to calculate an average velocity of the formation, the average velocity of the formation being an average of the first wave propagation velocity of the formation and the second wave propagation velocity of the formation.