Using the Equal Slope Methods to Optimized Artificial Lift in K Field With Two Artificial Lift Types

Abstract

Equal slope method is the simplest method in gas lift allocation and includes a linear optimization method. Where this method looks for the same gradient or degree of slope in gas lift performance curve. Optimization in a field with more than one artificial lift method is usually done using computational methods, while simple optimization methods such as equal slope have so far been applied to the field with one artificial lift, in gas lift only. So far, the application of the equal slope method to artificial lift other than gas lift has not been applied. In this study, we propose the use of the equal slope method to optimize the field using artificial lift such as an electrical submersible pump (ESP) and a gas lift to be simultaneously. The results showed that the equal slope method can be used to optimize the field with two lifting methods simultaneously. Before being applied to optimize the gas lift and ESP simultaneously, the proposed equal slope method is first tested to optimize other artificial lift besides gas lift. Using equal slope to optimize the ESP pump in the K field I s quick and simple. The results of the optimization with the proposed method for the K field with processing capacity limits (the maximum liquid processing capacity limit is 70,000 bpd, the maximum oil processing limit is 34,500 bopd), the ESP pump selected for the KE-1 well is the HN13500 pump, for the 2nd well the J7000N pump and K-3 well pump HN13500, with a QLtotal of 38,861 bbl / d, QOtotal 7,763.29 bbl / d and QWtotal 31,097.71 bbl / d. The case of optimization of two artificial lift on the ESP pump and gas lift that needs to be considered is the performance curve graph before combining, the curve on the x-axis must be in a similar variable so that it can be added to the master slope. Optimization using the equal slope method in field conditions that have two artificial lifts, for ESP and gas lift, in limited gas conditions and there are limitations on surface facilities, the field production rate is 61,361 bbl / d with a well flow rate using a gas lift of 22,500 bbl / d and wells using ESP of 38,861 bbl / d. Whereas for unlimited gas, the field production rate was 65,271 bbl / d with a well flow rate using gas lift of 26,271 bbl / d.