Limit of crustal drilling depth

查看全文 作　　者：[1]Y.S.Zhao;[1]Z.J.Feng;[1]B.P.Xi;[1]D.Yang;[1]W.G.Liang;[2]Z.J.Wan

机构地区：[1]Key Laboratory of In Situ Property-improving Mining of Ministry of Education,Taiyuan University of Technology;[2]College of Mining Engineering,China University of Mining and Technology

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》索引2017年第9卷第5期,共4页

基　　金：the financial supports by the National Natural Science Foundation of China(Grant Nos.50534030 and 51404161);the National Science Foundation for Distinguished Young Scholars of China(Grant No.51225404) 摘　　要：Deep drilling is becoming the direct and the most efficient means in exploiting deep mineral resources,facilitating to understanding the earthquake mechanism and performing other scientific researches on the Earth's crust.In order to understand the limit of drilling depth in the Earth's crust,we first conducted tests on granite samples with respect to the borehole deformation and stability under high temperature and high pressure using the triaxial servo-controlled rock testing system.Then the critical temperaturepressure coupling conditions that result in borehole instability are derived.Finally,based on the testing results obtained and the requirements for the threshold values of borehole deformations during deep drilling,the limit of drilling depth in the Earth's crust is formulated with ground temperature. 关键词：DRILLING well LIMIT of DRILLING depth HIGH temperature HIGH pressure BOREHOLE INSTABILITY

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Limit of crustal drilling depth

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