"Among the methods for determining the in-situ state of stress within the earth’s crust, hydraulic fracturing has been and is receiving much attention. This method, in principle, measures stress directly with no delicate electronic equipment required nor knowledge of the elastic modulus of the material.
This dissertation investigates experimentally whether or not control of fracture orientation can be achieved by the introduction of circular and elliptical prefractures along with sand inclusions into cast hydrostone blocks which are hydraulically fractured. A mathematical model is presented and analytically solved for the stress condition associated with a circular crack containing fluid pressure with a superimposed biaxial or uniaxial confining load. An analysis and correlation is made between the experimental results and the mathematical expectations.
It is concluded that under restricted stress conditions, fracture orientation and control can be achieved; however, for a general state of stress, fracture orientation cannot be achieved such that the plane of the hydraulic fracture will turn so as to become perpendicular to the least compressive stress"--Abstract, page ii.
Scott, James J.
Ph. D. in Physics
National Science Foundation (U.S.)
University of Missouri at Rolla
xiv, 153 pages
© 1966 William Joseph Kabeiseman, All rights reserved.
Dissertation - Open Access
Library of Congress Subject Headings
Oil wells -- Hydraulic fracturing
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Kabeiseman, William Joseph, "An investigation of the control of hydraulic fracturing through the inclusions of prefractures" (1966). Doctoral Dissertations. 446.