US 12,242,009 B2
Method and system for measuring strain rate at a scale shorter than gauge length
Vladimir Kazei, Houston, TX (US); Konstantin Osypov, Houston, TX (US); and Harold Merry, Houston, TX (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on Dec. 7, 2022, as Appl. No. 18/063,010.
Prior Publication US 2024/0192396 A1, Jun. 13, 2024
Int. Cl. G01H 9/00 (2006.01); G01V 1/22 (2006.01); G01V 1/42 (2006.01)
CPC G01V 1/42 (2013.01) [G01H 9/006 (2013.01); G01V 1/226 (2013.01); G01V 2210/121 (2013.01); G01V 2210/1429 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
deploying a plurality of discrete seismic receivers and a distributed acoustic system (DAS) in a borehole extending into a formation;
obtaining a first DAS measurement (DAS1) between a first position and a second position;
obtaining a second DAS measurement (DAS2) between a third position and a fourth position;
obtaining a discrete seismic receiver measurement between the second position and the fourth position;
determining an DAS equivalent discrete measurement (DASeq) from the discrete seismic receiver measurement;
determining a sub-gauge DAS measurement (DASsg) based, at least in part, on the first DAS measurement, the second DAS measurement and the DAS equivalent discrete measurement; and
determining mechanical characteristics of the formation based, at least in part, on the sub-gauge DAS measurement.