Incipient Yielding and Solids Production for Perforated Casing Completions

[+] Author and Article Information
E. P. Fahrenthold

Department of Mechanical Engineering, University of Texas, Austin, Tex. 78712

J. B. Cheatham

Department of MEMS, Rice University, Houston, Tex. 77251

J. Energy Resour. Technol 108(4), 321-325 (Dec 01, 1986) (5 pages) doi:10.1115/1.3231284 History: Received June 10, 1985; Revised September 30, 1986; Online October 22, 2009


Production rate limits for perforated casing completions in weak rock formations are estimated for a material obeying a quadratic yield condition. Plastic stresses around a spherical cavity are calculated to determine the well pressure value which precipitates solids production. Elastic solutions for a cylindrical cavity are utilized to place upper and lower bounds on the well pressure value which initiates yielding around a perforated casing. The separate analyses define consistent critical well pressure values for initial yield and solids production as a function of rock properties and in-situ conditions.

Copyright © 1986 by ASME
Topics: Solids , Pressure , Cavities , Rocks , Stress
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