Advances in sour gas injection for enhanced oil recovery-an economical and environmental way for handling excessively produced H2S

Proper handling of produced sour gas is a big challenge for operating companies due to the serious environmental and technical problems caused by H2S. Among various processing methods, reinjection into reservoirs cost-effective environmentally-friendly technique that not only enhances oil recovery but also allows underground storage The high safety requirements working with toxic H2 S have suppressed extensive experimental studies, hence injection has been adequately investigated implemented in laboratory compared other enhanced (EOR) methods. Existing studies show H2S content can bring about higher incremental than CO2 or CH4 highly miscible nature significant reduction minimum miscibility pressure (MMP) interfacial tension. Mineral dissolution as well sulfur asphaltene precipitation might occur consequences induced reactions, thus causing challenges such low injectivity, formation damage, poor sweep efficiency, contrary observations were reported. In addition, economics EOR depends on several critical factors, H 2 crude oil, price, impact. Overall, presents far more deserving full-fledged in-depth investigations. This review comprehensively assessed performance method integrating results experiments, simulation, field test economic analysis.