COOP - CRUSTAL ONSHORE-OFFSHORE PROJECT (RESEARCH AND MAPPING PROJECT)

The Geological Survey of Norway (NGU) has carried out a follow-up on the successful onshore-offshore projects in the Norwegian and Barents Seas. The study areas comprises an area of approx. 120.000 km². The pro-ject covers the Froan, Møre, Viking, Stord, Egersund, Norwegian-Danish and Central basins. The project in-cludes acquisition of six airborne surveys. The offshore surveys have a profile spacing of 500 m and 1 km, and a sensor altitude of 100 metres. Three combined aer-omagnetic and radiometric surveys along the coast of western Norway have a line spacing of 250 m and a flying altitude of 60 metres.

NGU has within the frame of the Coop studies compiled existing aeromagnetic surveys on the mainland and in the North Sea (e.g. VGET-95, VGVG-96, Q17, Viking-93 and SAS-96) and provides a comprehensive and state of the art aeromagnetic grid. High-resolution aero-magnetic surveys are particularly useful for detailed mapping of sand channels, volcanics, igneous bodies, salt diapirs, fault systems, deep weathering and depth to magnetic basement. This information provides a structural overview and is valuable for further survey planning like seismic, gravity and CSEM data acquisi-tion. The products of the projects include a basement character ization as well as full 3D crustal and thermal basement models. The new surveys constitute a part of an aeromagnetic remapping program of the Norwegian continental shelf and coastal areas.

ODLEIV OLESEN Team Leader, Continental Shelf Geophysics

odleiv.olesen@ngu.no Tel: +47 73 90 44 56

MORE INFORMATION?ORDERING:

Price Coop 1/2: 1,92 million NOK Coop 3: 1,68 million NOK

Outline of the Coop aeromagnetic surveys in the North Sea (CNAS-10) and along the coast of western Norway (BESTAS-10, SAS-11, TRAS-13 and STAS-13 and CAS-15). Dark blue and green lines show previous NGU and TGS surveys, respectively in the offshore areas.

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3D model of crust and mantle constituting the foundation for a 3D thermal model.

NGU - GEOLOGICAL SURVEY OF NORWAY

CONTACT ADDRESS

PO Box 6315 Sluppen NO-7491 Trondheim Phone: +47 73 90 40 00

VISITING ADRESS

Leiv Eirikssons vei 39, TrondheimE-mail: ngu@ngu.nowww.ngu.no/continental_shelf_geophysics

SOCIAL MEDIA

Facebook /Norges.geologiske.undersokelseTwitter /nguwebYoutube /nguweb

SPONSORSProject completion: Phase 1: 31 January 2013 Phase 2: 30 September 2015 Phase 3: 30 April 2018

NGU, NPD, Bayerngas, BKK, Centrica, ConocoPhillips, Det norske, DONG, Eni, E.ON, GdF Suez, Lundin, Maersk, Noreco, Repsol, RWE-Dea, Statoil, Suncor, Total, VNG og Wintershall .

Maps

• Aeromagnetic total field data-sets• Free air, Bouguer and isostatic gravity maps• Filtered magnetic and gravity maps• Heat flow map• Depth to magnetic sources• Combined interpretation maps (incl. basement

lithology and potential weathering)• Gravity and magnetic modelling along key transects• Combined interpretation with seismic data• Geodynamic and tectonic interpretations maps

Reports• Processing Reports • Interpretation Reports

DELIVERABLES

COASTAL SURVEY SPECIFICATIONS (BESTAS-10, SAS-11,

TRAS-13):

Line/tie-line spacing: 250 m / 2,5 km

Sensor elevation: approx. 60 m

Total flying distance: 260,000 km

Aeroplane: 2 x Piper Navajo and Cessna Reims F406

Magnetometers: 3 x Geomatrics G-822A

Spectrometers: 3 x Radiation Solutions RSX-5

OFFSHORE SURVEY SPECIFICATIONS (CNAS-10 and CAS-15):

Line/tie-line spacing: 500m -1 km / 4 km

Sensor elevation: approx. 100 m

Total flying distance: 163,000 km

Aeroplane: Piper Chieftain and Piper Narajo

Magnetometer: Scintrex Cesium Vapour MEP410

Noise envelope: ±0.1 nT

Sensor: CS-3 mounted in towed bird and stinger

MAIN OBJECTIVES

• Basement characterization • Lithology and age • Deep weathering • Heat production

• Depth to basement • Fault zones (onshore-offshore)• Dyke and sill intrusions • 2D & 3D crustal modelling • 3D thermal modelling • Geodynamic and tectonic interpretations • Subcrop mapping • Quaternary sand channels