Arctic well completion. Part 1. How permafrost thaw/freeze creates wellbore loading
Journal Article
·
· World Oil; (United States)
OSTI ID:6956205
Selected nonproprietary technology related to permafrost behavior, Arctic drilling problems, cement requirements, logging and testing concepts, casing and wellhead installation, specialized completion equipment, and permafrost protection methods are discussed. Part 1 defines and analyses the effects of thaw subsidence, excess ice, external freezeback, gas-hydrate decomposition, and lithology on soil behavior around the casing string as evidenced in field tests performed at Prudhoe Bay. The studies show that thaw subsidence can be attributed to four mechanisms - excess ice melting, consolidation with fluid expulsion, pore-pressure reduction, and stiffness reduction.
- OSTI ID:
- 6956205
- Journal Information:
- World Oil; (United States), Journal Name: World Oil; (United States) Vol. 185; ISSN WOOIA
- Country of Publication:
- United States
- Language:
- English
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