GEODYN2: A Bottomhole Assembly/Geological Formation Dynamic Interaction Computer Program

Abstract

pnt#nted at SPE meetings are subject to publicatan revlew by Editorial Committees of the Society of Petroleum Engineers Permission to copy IS rostmed to M abstract of not more than 300 words lllustratmns may not be copied The abstract should contain conspicuous acknowledgment of where and by whom the paper is presented Write Publicatmns Manager, SPE. P 0 Box 833836. The basic drill string mechanics implemented within the program, the overall algorithm, and the more pertinent modeling features which permit this level of analysis are briefly outlined. The implementation of these features and how they allow calculation of the response behavior of a bottom hole assembly are demonstrated.Although the development and enhancement of modeling capabilities within GEODYNZ is ongoing, it is anticipated that the preliminary verification results thus far generated will further the understanding of the response behavior of BHAs. INTRODUCTION

Challenges of Modeling Drilling Systems For the Purposes of Automation and Control

“…The drillstring, once rotating, contains huge angular momentum. This distributes itself in a non-uniform manner along its length reflected in the possibility that kilometres of pipe can come completely to rest whilst other parts can spin violently, Aldred (1992), Baird (1985), Dareing (1968), Richard (2007), .…”