Electromagnetic surveying for hydrocarbon reservoirs
US7126338B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2002 |
| Grant date | Oct 24, 2006 |
| Priority date | — |
| Expiry date | Sep 29, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electromagnetic survey method for surveying an area previously identified as potentially containing a subsea hydrocarbon reservoir, comprising obtaining first and second survey data sets with an electromagnetic source aligned end-on and broadside relative to the same or different receivers. The invention also relates to planning a survey using this method, and to analysis of survey data taken in combination allow the galvanic contribution to the signals collected at the receiver to be contrasted with the inductive effects, and the effects of signal attenuation, which are highly dependent on local properties of the rock formation, overlying water and air at the survey area. This is very important to the success of using electromagnetic surveying for identifying hydrocarbon reserves and distinguishing them from other classes of structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.