Review of current research on drilling-mud sumps in permafrost terrain

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Review of current research on drilling-mud sumps in permafrost terrain.pdf (710.32 KB, 下载次数: 5)

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ABSTRACT
Sumps in the Mackenzie Delta region of the Northwest Territories are intended to encapsulate drilling wastes within
frozen ground, but subsidence of sump covers suggests that the permafrost has degraded. Recent research on drillingmud
sumps in permafrost is reviewed to assess key factors related to sump performance. Mean permafrost
temperature is significantly associated with sump integrity, and can supersede the effect of sump closure practices.
Tall shrubs and deep snow on the sump cap play an important role in the thermal evolution and long-term integrity of
drilling-mud sumps. Climate warming is also likely to have significant impacts on drilling-mud sump integrity. These
studies suggest the importance of a long-term sump management approach.