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.