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Expedition POS504 with RV POSEIDON: Seepage process analyses at the abandoned well Blowout site (22/4b, North Sea)

Chief scientist: Dr. Jens Schneider von Deimling, Universität Kiel

The main target of the expedition der Expedition was the investigation of the so-called blowout at the abandaned well 22/4b in the British sector of the North Sea. The crater resulted from explorative drilling in 1990 and ist still emitting large amounts of methane.

Objective of the expedition was the study of dirfferent gas emission processes. Main task of ROV PHOCA was the documentation of these processes by means of cameras and sonar (CODAECHOSCOPE), deployment and recovery of different tools such as ADCP, Bubble Box and Bubble Catcher for quantification of emission rates and for later qualitative analyses of the gases (e.g. regarding microbiology), as well as sampling of sediments.

8 dives with approximately 25 hours bottom time were conducted.

Images (unless otherwise noted): ROV-Team GEOMAR; for enquiries of usage of image material please contact Pressestelle GEOMAR or Dr. Friedrich Abegg.


  • Scientific Head

    Dr. Friedrich Abegg
    GEOMAR Helmholtz Centre for Ocean Research Kiel
    Wischhofstr. 1-3
    D-24148 Kiel
    Technology & Logistics Centre
    Tel.: 0049 431 600-2134
    Fax: 0049 431 600-2680
    E-mail: fabegg(at) 

    Technical Head

    Martin Pieper (Dipl. Ing.)
    Technology & Logistics Centre
    Tel.: 0049 431 600-1688
    Fax: 0049 431 600-2680
    E-mail: mpieper(at) 

    Scientific Advisor

    Dr. Peter Linke
    Technik- & Logistikzentrum
    Tel.: 0431 600-2115
    Fax: 0431 600-1601
    E-mail: plinke(at)