Improvement in Upstream Oil and Gas Production Trough Flare Gas Recovery using Ejector System

Flare gas is a significant source of energy loss and air pollution in the oil and gas industries. In recent years, it has become a major concern, prompting various countries and industries to commit to "zero routine flaring" by 2030. Energy recovery from flare gas can be achieved through the use of a compressor, which is quite expensive. Therefore, this study aimed to analyze and study ejector system technically and economically. To achieve this, ejector geometries with different motive pressures were modeled and simulated using Ansys software. Subsequently, the amount of energy recoverable from flare gas was modeled and simulated with multi-unit processes integrated through Aspen Hysys software. The results showed that ejector recovered energy from flare gas on the XYZ platform by 226,879 mmbtu/year and reduced CO2 emissions by 13,284 tons/year. Economically, the use of this device had a net present value of 3,720,478 USD and a payback period (PBP) of 6 months, underscoring its economic viability.