Journal article
Biot critical frequency applied as common friction factor for pore collapse and failure of chalk with different pore fluids and temperatures
A fluid effect toward higher strengths for oil-saturated chalk compared with water-saturated chalk has previously been identified and labeled the "water-weakening phenomenon," but has not been further characterized physically. The hypothesis of this paper is that the Biot critical frequency with a strain or stress-rate dependence can be used to explain this behavior on the pore scale and can be extrapolated to the macroscale failure and pore-collapse properties.
A large set of previously published laboratory test results on chalk with different pore fluids was collected, and as a supplement we present a new test series on Stevns chalk with unconfined compression and Brazilian strength results. Copyright © 2011 Society of Petroleum Engineers.
Language: | English |
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Year: | 2011 |
Pages: | 1002-1009 |
ISSN: | 19300220 and 1086055x |
Types: | Journal article |
DOI: | 10.2118/130447-PA |
ORCIDs: | Andreassen, Katrine Alling and Fabricius, Ida Lykke |