Low frequency distributed acoustic sensing hydraulic fracture geometry
US11352878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2018 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Dec 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/646
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Monitoring and diagnosing completion during hydraulic fracturing operations provides insights into the fracture geometry, inter-well frac hits and connectivity. Conventional monitoring methods (microseismic, borehole gauges, tracers, etc.) can provide a range of information about the stimulated rock volume but may often be limited in detail or clouded by uncertainty. Utilization of DAS as a fracture monitoring tool is growing, however most of the applications have been limited to acoustic frequency bands of the DAS recorded signal. Low-frequency Distributed Acoustic Sensing (DAS) signal is used to constrain hydraulic fracture geometry. Events like fracture opening and closing, stress shadow creation and relaxation, ball seat and plug isolation can be clearly identified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.