Apparatus and method for borehole seismic exploration
US6181642A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1997 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Oct 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus are described for the seismic exploration of strata adjacent to a borehole, wherein an arrangement of geophones is lowered into the borehole and clamped to the wall. The geophones are clamped at essentially equal angular distances along the circumference of the borehole. A plurality of such arrangements can be positioned along the longitudinal axis of the borehole. By combining the outputs of the geophones noise signals generated by symmetric guided waves are attenuated. The arrangement can be used for cross-well seismic acquisition and in combination with seismic sources and/or attenuator so as to form an single-unit exploration tool for borehole seismics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.