Fracture Closure Stress (FCS) and Lost Returns Practices Conference Paper uri icon


  • In the mid 1990's the operator's lost returns mitigation practices were modified to align with a simple, but robust, rock mechanics concept that described the manner in which LCM and other products work. The model holds that regardless of the type of treatment used, integrity is increased by widening the fracture to increase its closing stress. Field practices have been changed to enhance a variety of mechanisms that may play a role in this process. Depending on the product, these mechanisms may include development of an immobile mass, deposition of solids in layers, development of viscous resistance, and the deposition of adhesive solids. The paper presents the development of the rock mechanics perspective, the resulting Fracture Closure Stress (FCS) Practices, a treatment selection guide, worldwide results, and discussion of the key factors that continue to limit performance in some situations. Copyright 2005, SPE/IADC Drilling Conference.

author list (cited authors)

  • Dupriest, F. E.

citation count

  • 88

publication date

  • January 2005


  • SPE  Publisher