US 12,345,153 B2
Distributed fiber-optic telemetry for data transmission and real-time location of downhole autonomous sensing devices
Marwan Charara, Moscow (RU); Anton Egorov, Moscow (RU); Anton Gryzlov, Moscow (RU); Huseyin Seren, Houston, TX (US); and Max Deffenbaugh, Houston, TX (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Appl. No. 18/263,096
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
PCT Filed Aug. 12, 2022, PCT No. PCT/RU2022/000253
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2024/035271, PCT Pub. Date Feb. 15, 2024.
Prior Publication US 2025/0020057 A1, Jan. 16, 2025
Int. Cl. E21B 47/12 (2012.01); E21B 47/135 (2012.01); E21B 47/14 (2006.01); E21B 47/16 (2006.01)
CPC E21B 47/135 (2020.05) [E21B 47/138 (2020.05); E21B 47/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for fiber-optic telemetry and autonomous sensor localization, comprising:
installing a Distributed Acoustic Sensor (DAS) system in a borehole comprising at least one fiber-optic cable connected to at least one corresponding interrogator;
deploying at least one autonomous sensor;
conducting at least one measurement by the at least one autonomous sensor;
encoding the at least one measurement in at least one encoded acoustic signal;
transmitting the at least one encoded acoustic signal from the at least one autonomous sensor to the at least one fiber-optic cable, wherein the at least one encoded acoustic signal comprises the at least one measurement;
detecting the at least one encoded acoustic signal with the DAS system;
recording the at least one encoded acoustic signal received by the DAS system at a surface location; and
processing the at least one encoded acoustic signal with a processing unit to decode and obtain the at least one measurement conducted by the at least one autonomous sensor and at least one location of the at least one autonomous sensor,
wherein a distributed temperature sensor (DTS) system is used for an additional sensor depth determination by matching a temperature profile recorded by the DTS system with a temperature transmitted by the at least one autonomous sensor in the at least one encoded acoustic signal.