Patent · US Expired

Electromagnetic method and apparatus for determining the nature of subterranean reservoirs using refracted electromagnetic waves

US6717411B2 · kind B2 · utility

32Cited by

53References

29Claims

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	Apr 6, 2004
Priority date	—
Expiry date	Aug 7, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG01V3/088
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for investigating subterranean strata. An electromagnetic field is applied using a dipole antenna transmitter and this is detected using a dipole antenna receiver. Phase information is extracted from a refracted wave response and used to identify the presence and/or nature of a subterranean reservoir.

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