Apparatus and methods for multicomponent marine geophysical data gathering
US7239577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2002 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Aug 30, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In one embodiment the invention comprises a particle velocity sensor that includes a housing with a geophone mounted in the housing. A fluid that substantially surrounds the geophone is included within the housing. The particle velocity sensor has an acoustic impedance within the range of about 750,000 Newton seconds per cubic meter (Ns/m3) to about 3,000,000 Newton seconds per cubic meter (Ns/m3). In another embodiment the invention comprises method of geophysical exploration in which a seismic signal is generated in a body of water and detected with a plurality of co-located particle velocity sensors and pressure gradient sensors positioned within a seismic cable. The output signal of either or both of the particle velocity sensors or the pressure gradient sensors is modified to substantially equalize the output signals from the particle velocity sensors and the pressure gradient sensors. The output signals from particle velocity sensors and pressure gradient sensors are then combined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.