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Proceedings of IADC Middle East Drilling Conference, Dubai, November 1998. 1 IADC Middle East Drilling Conference

Summary: Proceedings of IADC Middle East Drilling Conference, Dubai, November 1998. 1
IADC Middle East Drilling Conference
Case-Based Reasoning, a method for gaining experience and giving advise on how to avoid and
how to free stuck drill strings.
IADC Middle East Drilling Conference, Dubai, Nov. 3 - 4, 1998.
P. Skalle, A. Aamodt, J. Sveen
Paul Skalle, Assoc. Professor, NTNU, Dept. of Petroleum Technology, N-7034 Trondheim, Norway
Agnar Aamodt, Professor, NTNU, Dept. of Information Technology, N-7034 Trondheim, Norway
Jostein Sveen, Senior researcher, SINTEF, Dept. of Safety and Reliability, N-7034 Trondheim, Norway
Stuck pipe seems to be an unavoidable problem. Based on historical data every third well will experience stuck pipe, and various
estimates indicates that associated costs exceeds 250 mill $ per year for the industry. Since the problem is repetetive, a logical
countermeasure is to store the data describing stuck pipe situations and implement procedures that reuse this information to solve
similar problems when encountered. When a sufficiently large data base is created, it can be applied to analyse any new stuck pipe
situation: How does the new situation (new case) compare to any of the previous cases and what was the solution to the most
successful of them? What are the recommendations for the new case? If the new problem is solved, a new case can be created which
supports the recommended solution, or if the solution is different, an additional case can be created containing new insight and
experience. Along with the description of a case-based reasoning system implemented to study this problem, this paper also
presents statistical material of stuck pipe incidents from an operator for the years 1990-1996, together with how this material was
used to select the parameters for building a hierarchical knowledge model. A realistic case demonstrates the idea and how the overall


Source: Aamodt, Agnar - Department of Computer and Information Science, Norwegian University of Science and Technology


Collections: Computer Technologies and Information Sciences