Time-dependent borehole deformation in shale rocks and the influences on in-situ stress inversion
Hongxue Han, Maurice B. Dusseault, Shunde Yin, Zhuoheng Chen
In the proceedings of: GeoVirtual 2020: 73rd Canadian Geotechnical ConferenceABSTRACT: This paper presents a novel, economical, and prompt method to estimate the in-situ stresses and geomechanical parameters from borehole deformation data, which are determined from four-arm caliper logs. The methodology includes a poro-visco-elastic Finite Element Method simulation to quantify the time-dependent borehole deformation of shale and an optimization approach of the in-situ stresses inversion. It is observed first that the time-dependent borehole deformation is mainly influenced by the visco-elastic properties of the rock; second, that the inverted maximum horizontal in-situ stress for visco-elastic shale rocks is substantially smaller than that of a linear-elastic calculation; and last, the estimate Young’s modulus for visco-elastic rocks is much higher than the Young’s modulus calculated from linear-elastic rocks.
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Han, Hongxue, Dusseault, Maurice B., Yin, Shunde, Chen, Zhuoheng (2020) Time-dependent borehole deformation in shale rocks and the influences on in-situ stress inversion in GEO2020. Ottawa, Ontario: Canadian Geotechnical Society.
@article{Han_GEO2020_162,
author = Hongxue Han, Maurice B. Dusseault, Shunde Yin, Zhuoheng Chen,
title = Time-dependent borehole deformation in shale rocks and the influences on in-situ stress inversion ,
year = 2020
}
title = Time-dependent borehole deformation in shale rocks and the influences on in-situ stress inversion ,
year = 2020
}