Pgs Geophysical as

Marit Ronaess

Ulf Peter Lindqvist

Stig Rune Lennart Tenghamn

Kenneth Karlsen

Bruce William Harrick

Rune Johan Magnus Mattsson

Oliver Colin Peppe

Martin Austad

Anders Göran Mattsson

Svein Torleif Vaage

Toril Margrethe Bruun Vaage

Lena Kristina Frenje Lund

Eivind Fromyr

Svend Edland

Stig Rune Tenghamn

Rune Johan Mattsson

Anders Goeran Mattsson

Lena Kristina Lund

Knut Johan Roessberg

Anders Goran Mattsson

Lena Kristina Frenje

Knut Rossberg

Disclosed are methods and systems for towing one or more electromagnetic sensor streamers from deflectors in an additional geophysical sensor streamer spread. An embodiment discloses a marine geophysical survey system, comprising: a survey vessel; an electromagnetic sensor streamer; and a geophysical sensor streamer spread configured to be towed by the survey vessel, wherein the geophysical sensor streamer spread comprises: sensor streamers configured to be laterally spaced apart from one another; and deflectors adapted to spread the sensor streamers substantially transversely in relation to a direction of motion of the survey vessel, wherein the electromagnetic sensor streamer is configured to be towed from at least one of the deflectors.

Towing methods and systems for geophysical surveys

A receiver streamer system for marine electromagnetic surveying includes a first streamer, and a second streamer disposed substantially parallel to and spaced apart from the first streamer. A first pair of electrodes is associated with the first streamer and a second pair of electrodes is associated with the second streamer. Each of the first and second pairs of electrodes is functionally associated with a voltage measuring circuit configured to measure voltage along an inline direction. At least one electrode on each of the first and second streamers is configured and associated with a voltage measuring circuit to make voltage measurements in a cross-line direction.

Receiver streamer system and method for marine electromagnetic surveying

A method for reducing motion induced voltage in marine electromagnetic measurements includes measuring an electromagnetic field parameter at at least one position along a sensor cable towed through a body of water. Motion of the sensor cable is measured at at least one position along the cable; Voltage induced in the cable is estimated from the motion measurements. The measured electromagnetic field parameter is corrected using the estimated voltages.

Method and apparatus for reducing induction noise in measurements made with a towed electromagnetic survey system

Growing community of inventors

Gjettum, Norway

Marit Ronaess