Method and apparatus for determining the nature of subterranean reservoirs

US7202669B2 · kind B2 · utility

Assignee

• ELECTROMAGNETIC GEOSERVICES ASA · NO

Inventors

• Svein Ellingsrud · Trondheim, NO
• Terje Eidesmo · Trondheim, NO
• Hans Pedersen · Narvik, NO
• Tor Schaug-Pettersen · Trondheim, NO

Key dates

• Filing date: Dec 12, 2005
• Grant date: Apr 10, 2007
• Expiry date: Dec 12, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V3/12
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system for detecting or determining the nature of a subterranean reservoir. An electromagnetic field is applied using a dipole antenna transmitter and this is detected using a dipole antenna receiver. The measurements are taken with the antenna both in-line and parallel and the difference between the two sets of measurements is exploited. A characteristic difference indicates a high resistive layer, which corresponds to a hydrocarbon reservoir.