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P&A of Valhall DP wells

Njå, Nils Oskar Berg
Master thesis
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P&A of Valhall DP wells.pdf (3.110Mb)
URI
http://hdl.handle.net/11250/183414
Date
2012
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  • Master's theses (TN-IPT 2007-2017) [533]
Abstract
The original platforms on the Valhall field will have to be decommissioned due to integrity issues. The oldest drilling platform, Valhall DP, has 30 wells that must be P&A in order to remove the platform. This thesis examines the challenges for P&A of the Valhall DP wells. To understand why the Valhall DP wells have to be P&A-ed, a detailed field description has been given, especially with regard to compaction and subsidence. Both internal BP regulations and NCS regulations have been evaluated and compared. Alaskan regulations have been compared as well to show the differences between different regulatory regimes. In order to P&A the Valhall DP wells according to NCS and BP regulations, new technology will have to be invented. A review of new technology, non commercialized technology and new plugging materials has therefore been included. A proposal for a general P&A plan has also been included.
Description
Master's thesis in Petroleum engineering
Publisher
University of Stavanger, Norway
Series
Masteroppgave/UIS-TN-IPT/2012;

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