Production and optimisation of a well by hybrid artificial activation
Abstract
This paper focuses on proposing a hybrid activation mechanism for the production and optimisation of a well called X101 (for confidentiality reasons), which has become non-eruptive. Completion, pressure, volume, temperature (PVT), reservoir, and the X101 well profile data are processed by Pipesim and Excel software and integrating a certain number of calculations using nodal and decline curve analysis methods. The activation of the X101 well by an electric submersible pump (ESP) having 450 stages provided an oil production flow rate of 9189.329 stock tank barrels per day with a bottom-hole pressure of 2746.151 psi. Over time, the X101 well activated by the ESP having 450 stages faces a succession of maintenance operations occurring in very short time intervals following the reduction in the efficiency of the ESP. To overcome the problem of frequent maintenance which disrupts production times, the gas lift is added to the X101 well activated by a new ESP having 199 stages. The installation of the gas lift reveals that the adequate gas injection flow rate is 2 million standard ft3 per day and 2 valves must be installed at 4,959 ft and 3,966 ft to suitably meet the production requirements. The X101 well activated by the combination of ESP and gas lift delivered a production flow rate of 7954.601 stock tank barrels per day with a bottom-hole pressure of 2873.623 psi and its optimisation made it possible to obtain a net oil flow rate of 9,035 stock tank barrels per day at the bottom-hole pressure of 2,762 psi. The profitability of the X101 well activated by the combination of ESP and gas lift is USD 73,163,517 for a return on investment after 9 months and 22 days for 13 years of production.
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