US 12,130,394 B2
Fiber optic interrogation system
Paul Stopford, Clamart (FR); Surya Simanjuntak, Clamart (FR); and Dmitry Kortukov, Houston, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 17/754,406
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Oct. 2, 2020, PCT No. PCT/US2020/053894
§ 371(c)(1), (2) Date Mar. 31, 2022,
PCT Pub. No. WO2021/067662, PCT Pub. Date Apr. 8, 2021.
Claims priority of provisional application 62/910,194, filed on Oct. 3, 2019.
Prior Publication US 2022/0334279 A1, Oct. 20, 2022
Int. Cl. G01V 1/22 (2006.01); E21B 47/135 (2012.01); G02B 6/42 (2006.01)
CPC G01V 1/226 (2013.01) [E21B 47/135 (2020.05); G02B 6/4215 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fiber optic sensing system for use in a wellbore, the system comprising:
Distributed Acoustic Sensing (DAS) instrumentation comprising an interrogator;
Distributed Temperature Sensing (DTS) instrumentation comprising an interrogator;
a first coupler comprising a first input and a second input, the DAS instrumentation coupled to the first input, and the DTS instrumentation coupled to the second input;
a filter disposed between the DAS instrumentation and the first coupler, the filter configured to allow DAS produced light to pass through but reject DTS produced light; and
a multicore optical fiber coupled to the first coupler, wherein the first coupler is disposed between the DAS instrumentation and the multicore optical fiber, and wherein the first coupler is disposed between the DTS instrumentation and the multicore optical fiber.