TY - JOUR
T1 - Experimental validation of core-based pre-stress evaluations in rock
T2 - A case study of Yutengping sandstone as CO2 storage reservoir rock
AU - Wu, Jian Hong
AU - Lin, Hung Ming
AU - Chen, Yu You
N1 - Publisher Copyright:
© 2016 Terrestrial, Atmospheric and Oceanic Sciences (TAO). All rights reserved.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/6
Y1 - 2017/6
N2 - Yutengping Sandstone is a potential reservoir for geological CO2 storage in Tieh-chan-shan, Taiwan. Cyclic loadings were applied to rock samples taken from an outcrop to create artificial pre-stress. The accuracies of pre-stress evaluations using two core-based techniques, acoustic emission (AE) and deformation rate analysis (DRA), were investigated under different pre-stresses, delay times, and curing temperatures. The experimental results validate the evaluation of pre-stresses by AE and DRA. Delay time and curing temperature were shown to have minor impacts on the accuracy of these measurements. However, though both axial strain and lateral strain can be used in DRA, the stress memory fades as the delay time increases. Therefore, delay time, which represents the time from the borehole drilling to the DRA test, must be carefully considered when applying these techniques to evaluate the in situ stress of Yutengping sandstone.
AB - Yutengping Sandstone is a potential reservoir for geological CO2 storage in Tieh-chan-shan, Taiwan. Cyclic loadings were applied to rock samples taken from an outcrop to create artificial pre-stress. The accuracies of pre-stress evaluations using two core-based techniques, acoustic emission (AE) and deformation rate analysis (DRA), were investigated under different pre-stresses, delay times, and curing temperatures. The experimental results validate the evaluation of pre-stresses by AE and DRA. Delay time and curing temperature were shown to have minor impacts on the accuracy of these measurements. However, though both axial strain and lateral strain can be used in DRA, the stress memory fades as the delay time increases. Therefore, delay time, which represents the time from the borehole drilling to the DRA test, must be carefully considered when applying these techniques to evaluate the in situ stress of Yutengping sandstone.
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U2 - 10.3319/TAO.2015.09.21.02(GSC)
DO - 10.3319/TAO.2015.09.21.02(GSC)
M3 - Article
AN - SCOPUS:85019771049
VL - 28
JO - Terrestrial, Atmospheric and Oceanic Sciences
JF - Terrestrial, Atmospheric and Oceanic Sciences
SN - 1017-0839
IS - 3
ER -