Paleomagnetic Projects in the North Sea & Netherlands

Paleomagnetic projects in the North Sea and the Netherlands include many examples where Applied Paleomagnetics provided paleomagnetic services to petroleum and geotechnical companies since 1986. Our paleomagnetic projects in the North Sea and the Netherlands relied on our paleomagnetic core orientation service to determine natural fracture, bedding, and in situ stress orientations in oil and gas fields. In the North Sea, our paleomagnetic projects focused on paleomagnetic core orientation in the following formations: Carboniferous, Rotliegend, Zechstein, Bunter, Skagerrak, Brent, Heather, Central Graben, Crommer Knoll, Barremian limestone, Maastrichtian and Danian chalk (Tor, Ekofisk) in the following oil fields: Pelican, Tern, Marnock, Skua, Auk, Ekofisk, Gert, Lulu, N. Jens, Valdemar, Gorm, Skjold, Dan, Galleon, Barque, Clipper, U.K. blocks 3/3, 30/6, 48/19, Dutch blocks F/3, K/4, K/17, P/1, Q/16. Onshore Netherlands, our paleomagnetic projects focused on paleomagnetic core orientation in Zechstein carbonates from Emmen and Schoonebeek fields. In the Norwegian Sea, our paleomagnetic projects involved paleomagnetic core orientation of Engelvaer shale and Tomma sandstone from Heidrun field on the Haltenbanken. The goals of our paleomagnetic core orientation projects in the North Sea and the Netherlands were to determine fracture permeability anisotropy in fractured reservoirs; to determine in situ stress by paleomagnetically orienting geomechanical test samples and induced fractures in cores; to measure paleocurrent orientations from cross-beds in sands; and to determine structural dip from bedding in shale. Understanding natural fractures and in situ stress in oil and gas fields in the North Sea and the Netherlands is important for planning optimum trajectories and locations for deviated and horizontal wells. Understanding sediment transport directions from paleomagnetically oriented cross-beds in cores from the North Sea and the Netherlands is important because permeability anisotropy in many oil and gas fields is controlled by trends of channel and tidal sand bodies or by paleowind directions in eolian Rotliegend sandstone. Other paleomagnetic projects we conducted in the North Sea were focused on tectonic and diagenetic histories and changes in magnetic properties caused by hydrocarbon migration along faults and fractures in oil and gas reservoirs, especially in the Viking and Central Graben.

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