Optimization of Weight on Bit During Drilling Operation Based on Rate of Penetration Model

Abstract

Drilling optimization is very important during drilling operation. This is because it could save time and cost of operation thus increases the profit. Drilling optimization aims to optimize controllable variables during drilling operation such as weight on bit and bit rotation speed for obtaining maximum drilling rate. In this project, Bourgoyne and Young ROP model had been selected to study the effects of several parameters during drilling operation. Important parameters such as depth, pore pressure, equivalent circulating density, bit weight, rotary speed, bit tooth wear and jet impact force are extracted from a final drilling report. In order to study their relationship statistical method which is multiple regressions analysis has been used. The penetration model for the field is constructed using the results from statistical method. In the end, the result from analysis is used to determine optimum values of weight on bit that give optimum drilling operation. Overall, this project provides a study of the most complete mathematical model for rate of penetration that was constructed by Bourgoyne and Young. From the research the constants that represented several drilling variables had been determined. The rate of penetration for the field had been predicted based on constants for every data vs. Depth. Finally, optimized weight on bit had been calculated for several data points. In the end, drilling simulator (Drill-Sim 500) was used to prove the results based on actual field data.

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