GAS LIFTING DESIGN USING CONTINUOUS GAS LIFTING METHOD: A CASE STUDY OF NPDC WELL 22L IN PTIX FIELD

ABSTRACT This project focuses on the gas lift design and performance analysis of Well 22L, located in the PTIX field with a reservoir depth of 9,000 ft. The study evaluates the well's initial production parameters, reservoir characteristics, and subsequent performance enhancements through a staged gas lift system. With a reservoir pressure of 2,500 psi, a productivity index of 9.0 STB/D/psi, and a target production rate of 3,000 BOPD, the well's gas lift process was optimized by strategically placing 12 valves at depths ranging from 2,100ft to 7,600ft. The first valve, which should be installed at depth 2100ft known as the kick off valve, initiates production by displacing fluids and reducing hydrostatic pressure, while subsequent valves, known as unloading valve maintain tubing pressure and the last valve, known as the operating valve should be installed at depth 7600ft, ensure efficient gas injection. The volume of gas needed to achieve 3000BOPD production rate was obtained as 960,000 SCF (960mscf/d) (320 SCF/bbl × 3,000 BOPD). The project highlights the impact of gas lift on stabilizing flow conditions, minimizing operational costs, and extending well productivity despite declining reservoir pressure. A comparative analysis of initial and current performance revealed significant improvements in flowing bottom hole pressure, stabilized production rates, and reduced gas injection costs.