Method and apparatus for determining the content of subterranean reservoirs

US6628119B1 · kind B1 · utility

Assignee

• Den Norske Stats Oljeselskap A.S. · NO

Inventors

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

Key dates

• Filing date: Jul 9, 2001
• Grant date: Sep 30, 2003
• Expiry date: Jul 9, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A90/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system for determining the nature of a subterranean reservoir 12 whose position and geometry is known from previous seismic surveys. An electromagnetic field 24, 25, 26, 27 is applied by a transmitter 18 on the seabed 14 and detected by antennea 21, 22, 23 also on the seabed 14. The nature of the detected reflected waves 25, 26, 27 is used to determine whether the reservoir 12 contains water or hydrocarbons.