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Tensile stresses around boreholes due to transient fluid flow
Author(s) -
Chan Derek Y. C.,
Hughes Barry D.,
Paterson Lincoln
Publication year - 1993
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610170905
Subject(s) - borehole , coalbed methane , geotechnical engineering , ultimate tensile strength , stress (linguistics) , flow (mathematics) , transient (computer programming) , geology , pore water pressure , effective stress , porosity , cylinder stress , petroleum engineering , materials science , mechanics , engineering , coal mining , coal , composite material , linguistics , philosophy , physics , computer science , operating system , waste management
We present solutions for the effective stress induced by gas flow through a porous solid into a borehole resulting from sudden pressure reduction. Tensile effective stress that exceeds the strength of the solid will lead to borehole failure. This has applications to the intentional creation of cavities, relevant to the efficient recovery of coalbed methane, and the avoidance of borehole stability problems in conventional gas production.