Method of exploring a region below a surface of the earth
US9389325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2008 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Jun 16, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/1236
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A passive method for exploring a region below the surface of the earth. The method comprises using a plurality of sensors to obtain seismic data obtained by recording ambient seismic interface waves in a frequency range whose lower limit is greater than 0 Hz, and whose upper limit is less than or equal to substantially 1 Hz. The sensors may be sensitive to three orthogonal components. Recordings may be made simultaneously by all sensors and normalization of data is unnecessary. The sensors may be moved and clean data may be selected. Local dispersion curves may be determined to improve vertical resolution. The data are processed so as to obtain a measure of the energy in a frequency band within the frequency range. The energy measure may be calculated by integrating the spectrum in the frequency domain over a desired frequency range. The resulting calculated energy provides information about the region of the earth being explored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.