Method for marine geoelectrical exploration with electrical current focusing
US8762062B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 25, 2009 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Nov 30, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for marine geoelectrical exploration use a dipole source, to send electric pulses into the medium. Geometrical probing is performed during current pulses, and probing on transient processes is performed in the intervals. Measurements are taken using measuring apparatus mounted on the seafloor. The apparatus includes, five electrodes: a central electrode with four others around it. During the current flow period and intervals between current pulses, the second electric potential difference between external electrodes and the central electrode, as well as the first electric potential difference between three pairs of external electrodes is measured. Measured values are used to calculate three sets of standard electrical parameters. A model of the medium is produced from the parameters. Techniques disclosed provide for elimination of lateral effect on probing results, and delineation of hydrocarbon accumulation with high contrast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.