Comparison of Results from Some Wellbore Simulators Using a Data Bank

Abstract

Five wellbore simulators have been tested using a data bank of selected data from around the world. These simulators were programmed on the various computers available at the Institute from information published in the technical press. Comparisons are made with the measured dynamic pressure and temperature profiles or the measured output or deliverability curve. The limitation of the simulators is demonstrated particularly with respect to the assumptions made in the methods of analysis. Some of the methods assume only pure water, others take account of solids, mainly chlorides, whilst others include the effect of gases. Some of the simulators allow for wellbore heat transfer, others allow the simulation to proceed up or down the well. The choice of a productivity index also varies from method to method. This paper discusses these points and points the way for a simulator that includes these and other effects.