Mapping near-surface heterogeneities in a subterranean formation
US11561312B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2019 |
| Grant date | Jan 24, 2023 |
| Priority date | — |
| Expiry date | Sep 28, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/67
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems for identifying near-surface heterogeneities in a subterranean formation using surface seismic arrays can include: recording raw seismic data using sensors at ground surface; applying a band bass filter to the raw seismic data using a central frequency; picking a phase arrival time for the filtered data; generating an initial starting phase velocity model for tomographic inversion from the raw seismic data; applying tomographic inversion to the filtered data to generate a dispersion map associated at the central frequency; repeating the applying a band bass filter, picking a phase arrival time, generating an initial starting velocity model, and applying tomographic inversion steps for each of a set of central frequencies; and generating a three-dimensional dispersion volume representing near-surface conditions in the subterranean formation by combining the dispersion maps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.