TY - GEN
T1 - On the high stress compression of Canadian oil sand
AU - Doan, D. H.
AU - Delage, P.
AU - Nauroy, J. F.
AU - Tang, A. M.
AU - Mainguy, M.
PY - 2011/1/1
Y1 - 2011/1/1
N2 - High stress oedometric compression tests (maximum 65 MPa) were carried out on samples of oil sand from Athabasca. X-Ray microtomography observation suggested that the initially dense interlocked grain fabric of the natural specimen has been altered by extraction, stress release, temperature change, storage, transport and sample trimming, resulting in a clearly apparent micro-crack network. Some time dependent effects that overestimated sample compressibility were observed when using the standard step loading procedures and a procedure with short steps (5 mn instead of 24 h) appeared to be better adapted. At low stresses, the sample disturbance appeared to overestimate the sand compressibility and it is suggested that better parameters could be obtained once submitting the sample to the maximum stress supported during its geological history (here 24 MPa). Grain crushing at high stresses was also evidenced and the role of grain crushing during the history of the deposit was also commented.
AB - High stress oedometric compression tests (maximum 65 MPa) were carried out on samples of oil sand from Athabasca. X-Ray microtomography observation suggested that the initially dense interlocked grain fabric of the natural specimen has been altered by extraction, stress release, temperature change, storage, transport and sample trimming, resulting in a clearly apparent micro-crack network. Some time dependent effects that overestimated sample compressibility were observed when using the standard step loading procedures and a procedure with short steps (5 mn instead of 24 h) appeared to be better adapted. At low stresses, the sample disturbance appeared to overestimate the sand compressibility and it is suggested that better parameters could be obtained once submitting the sample to the maximum stress supported during its geological history (here 24 MPa). Grain crushing at high stresses was also evidenced and the role of grain crushing during the history of the deposit was also commented.
UR - https://www.scopus.com/pages/publications/80052453336
M3 - Conference contribution
AN - SCOPUS:80052453336
SN - 9781617829666
T3 - 73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011: Unconventional Resources and the Role of Technology. Incorporating SPE EUROPEC 2011
SP - 991
EP - 995
BT - Society of Petroleum Engineers - 73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011 - Incorporating SPE EUROPEC 2011
PB - Society of Petroleum Engineers
ER -