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Technology Assessment & Research (TA&R) Program
 
Project Number 582
Date of Summary November 21,2008
Subject A Probabilistic Approach to Risk Assessment of Managed Pressure Drilling in Offshore Drilling Applications
Performing Activity MOHR Engineering Division
Principal Investigator Ken Malloy
Contracting Agency Minerals Management Service
Estimated Completion Completed
Description Based on studies sponsored by the American Petroleum Institute (API) and Minerals Management Service (MMS) prior to 2008, between 25% to 33% of remaining undeveloped reservoirs were  unfavorable using conventional overbalanced drilling methods due in large to the increased likelihood of well control problems such as differential sticking, lost circulation, kicks, and blowouts. The challenge before industry was to develop an efficient method to drill and develop these reservoirs in a manner that is no less safe than current drilling methods. The goal of this study was to study and develop MPD techniques that dynamically control annular pressures to facilitate drilling of what might otherwise be economically unattainable.
Progress Study completed on November 18, 2008.
Report
AA (3 pages) Comparative risk using MPD techniques, Technical Paper by Kenneth Malloy, Stress Engineering Services, Houston, TX as published in the March/April 2006 Issue of Drilling Contractor.  MMS reuse of this publication was granted by permission from IADC Publications on October 16, 2008.
AB (5 pages) Managed pressure drilling - What is it anyway?, Technical Paper by Kenneth Malloy, Stress Engineering Services, Houston, TX as published in the March 2007 Issue of World Oil.  MMS reuse of this publication was granted by permission from Gulf Publishing Company, October 16, 2008.
AC (204 pages) A Probabilistic Approach to Risk Assessment of Managed Pressure Drilling in Offshore Applications, by Kenneth Malloy, MOHR Engineering, a division of Stress Engineering Services, Inc., Houston, TX , October 31, 2008.

Last Updated: 12/22/2010, 09:38 AM Central Time