Tensile stresses around boreholes due to transient fluid flow

✍ Scribed by Derek Y. C. Chan; Barry D. Hughes; Lincoln Paterson

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 478 KB
• Volume: 17
• Category: Article
• ISSN: 0363-9061
• DOI: 10.1002/nag.1610170905

✦ Synopsis

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.