Patent · US Expired

Electromagnetic methods and apparatus for determining the content of subterranean reservoirs

US6696839B2 · kind B2 · utility

29Cited by

36References

18Claims

0Family size

Assignee

STATOIL ASA · NO

Inventors

Svein Ellingsrud · Trondheim, NO
Terje Eidesmo · Trondheim, NO
Harald Westerdahl · Råholt, NO
Fan-Nian Kong · Oslo, NO

Key dates

Filing date	Aug 7, 2002
Grant date	Feb 24, 2004
Priority date	—
Expiry date	Aug 7, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG01V3/12
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system for investigating subterranean strata. An electromagnetic field is applied using a fixed dipole antenna transmitter and this is detected using a dipole antenna receiver. The receiver is moved from one location to another in dependence upon the strength of the detected signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.