Artificial Lift Methods Selection for New Fractured Horizontal Wells in the Wolfcamp a Formation, Delaware Basin, New Mexico

Abstract The objectives of this study are outlined as follows: (1) to develop a characteristic Inflow Performance Relationship (IPR) model for the Wolfcamp A Formation, and (2) to design and optimize the selection of Artificial Lift (AL) methods for new fractured horizontal wells in the Wolfcamp A Formation, Delaware Basin, New Mexico. The research begins by constructing an algorithm to calibrate the IPR model using data from four production wells in the Wolfcamp A Formation. Subsequently, predictions are made regarding changes in IPRs over time and production rates. Some commercial software was used to assess fracture characteristics and build Outflow Performance Relationship curves. Current widely used AL methods are considered based on their applicability to the operating conditions in the Wolfcamp A Formation, followed by a screening process. A matrix of applicable cases is constructed and evaluates the production efficiency by optimizing each method for individual cases. The analysis is conducted through a combination of analytical techniques and the utilization of commercial software. The proposed selection of appropriate AL methods for the Wolfcamp A Formation is based on an economic analysis of each case. With this study, the IPR model has been calibrated for the Wolfcamp A Formation, Delaware Basin, New Mexico, characterized by a set of new coefficients specific to the region. The IPR changes rapidly within 7 to 10 months, transitioning from the initial stage to the depletion stage. Four distinctive IPR curves for the Wolfcamp A Formation and each production well have been developed. Through a screening process, three AL methods suitable for the production conditions in the Wolfcamp A Formation were selected: Gas lift, Electric Submersible Pump (ESP), and Rod Pump combined with Natural Flow. Optimization and economic comparisons were conducted for 20 scenarios using a combination of these methods. The results indicate that the optimal selection for fractured horizontal wells in the Wolfcamp A Formation is Natural Flow for the first 3 months, followed by the deployment of ESP. AL design for fractured horizontal wells is challenging due to the complex and rapidly changing formation condition in unconventional reservoir. These wells experience the production rate decline in short periods of time; thus, traditional AL design approaches may not be suitable. The research proposed an optimal AL methods selection for new fractured horizontal wells in the Wolfcamp A Formation. It contributes to a deeper understanding of production characteristics and optimal design AL methods for prolonging well life in the area.