Paper: COMPARATIVE STUDY OF DOWNHOLE CARDS USING MODIFIED EVERITT-JENNINGS METHOD AND GIBBS METHOD
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Abstract
COMPARATIVE STUDY OF DOWNHOLE CARDS USING MODIFIED EVERITT-JENNINGS METHOD AND GIBBS METHOD
Presenters
Victoria Ehimeakhe
Weatherford International
The Gibbs method has been the most widely used method for calculating downhole data in sucker rod pumping. This paper presents how the Everitt-Jennings algorithm was modified and applied to the calculation of downhole position vs. time and load vs. time data.
This modified Everitt-Jennings algorithm incorporates iteration on the net stroke and damping factor along with a fluid level calculation as part of the calculation. This paper compares the downhole cards calculated from surface data retrieved in the lab and field, using the modified Everitt-Jennings algorithm and the Gibbs method.