Ionic transport in swelling shale

✍ Scribed by J.D. Sherwood

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 784 KB
• Volume: 61
• Category: Article
• ISSN: 0001-8686
• DOI: 10.1016/0001-8686(95)00259-s

✦ Synopsis

A model of hindered transport of solute in shale is described, and then used to predict the radial flow of water and solute away from a wellbore. Shale strata in the field may be assumed to extend to infinity, but laboratory tests are performed using finite samples of shale; both cases are studied. Osmotic effects can create transient changes in the pore pressure (and total stress) which may lead to a disintegration of the drilled shale and mechanical instability of the wellbore.