Application of Expert System to Lost Circulation Problem in Geothermal Wells

Abstract

Lost circulation is one of the most severe problems encountered in drilling and completing geothermal wells. New Energy and Industrial Technology Development Organization (NEDO) is conducting an active research and development aimed at solving lost circulation problems. The objective of the R & D is to develop systematic procedures for field use in combating lost circulation, and the program consists of loss zone detection/analysis techniques and meterials/placement techiques.
In this program, the application of expert system to fluid loss control is devised. An expert system is a computer program which simulates a decision process of human expert in a given field. In a preliminary system, the existing body of knowledge on lost circulation methods and materials has been assembled in such a manner as to provide a computerized tool for use in the field. Based on known drilling parameters and available information, the system wold suggest courses of action to be taken which would reduce uncertainity and mistake in the decision process of field personnel.