Abstract
Fundamental concepts related on subsurface pressures are firstly introduced, including hydrostatic pressure, in situ stress, formation pore pressure, and formation fracture pressure. Based on them, the origin of abnormal pressures is analyzed. After that, prediction and detection of abnormal formation pore pressures, formation fracture pressure, and formation collapse pressure are discussed in detail. In the second section, the rock engineering mechanical characteristics are presented with respect to uniaxial strengths and triaxial strengths, rock brittleness, rock hardness, rock drillability, rock abrasiveness. Finally, the influencing factors of confining pressure on rock mechanical properties are analyzed.
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© 2021 China University of Petroleum Press and Springer Nature Singapore Pte Ltd.
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Guan, Z., Chen, T., Liao, H. (2021). Engineering Geological Conditions for Drilling Operations. In: Theory and Technology of Drilling Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-9327-7_1
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DOI: https://doi.org/10.1007/978-981-15-9327-7_1
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Publisher Name: Springer, Singapore
Print ISBN: 978-981-15-9326-0
Online ISBN: 978-981-15-9327-7
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