Den Norske Stats Oljeselskap A.s.

Statoil Asa

Electromagnetic Geoservices As

Norgas Geotekniske Institut

Stale Johansen

Svein Ellingsrud

Terje Eidesmo

Harald Westerdahl

Fan-nian Kong

Anders Farestveit

Sylvia Sandra Pettersen, Legal Representative

A system for investigating subterranean strata. An electromagnetic field and a seismic event are applied from the same location and the responses are detected using respective receivers both located at a second location spaced from the first. The responses are combined to identify the presence and/or nature of subterranean reservoir. The refracted wave components are used.

Method and apparatus for determining the nature of submarine reservoirs

A method for mapping a submarine or subterranean reservoir by conducting an electromagnetic survey using an electromagnetic field in the form of a wave. An electromagnetic field is applied by a transmitter on the seabed and detected by antennae. The nature of the detected reflected waves is used to determine whether the reservoir contains water or hydrocarbons, which may then be produced from a well that penetrates the reservoir.

Electromagnetic surveying for mapping the content of subterranean reservoirs

A system for determining the nature of a subterranean reservoir whose position and geometry is known from previous seismic surveys. An electromagnetic field is applied by a transmitter on the seabed and detected by antennea also on the seabed . The nature of the detected reflected waves is used to determine whether the reservoir contains water or hydrocarbons.

Method and apparatus for determining the content of subterranean reservoirs

Growing community of inventors

Melhus, Norway

Stale Johansen