Method of using semblance of corrected amplitudes due to source mechanisms for microseismic event detection and location
US10036819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2015 |
| Grant date | Jul 31, 2018 |
| Priority date | — |
| Expiry date | Aug 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/65
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining hypocenters of microseismic events includes entering as input to a computer seismic signals recorded by a plurality of seismic sensors disposed proximate a volume of subsurface to be evaluated. For each point in space in the volume, and for a plurality of preselected origin times, a seismic energy arrival time at each seismic sensor is determined. Event amplitudes for each arrival time are determined. A synthetic event amplitude is calculated for each arrival time. A semblance between the determined event amplitudes and the synthetic event amplitudes is determined. Existence of an actual microseismic is determined event when the semblance exceeds a selected threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.