Comparison of oil removal in surfactant alternating gas with water alternating gas, water flooding and gas flooding in secondary oil recovery process.

摘要: Growing oil prices coupled with large amounts of residual after operating common enhanced recovery methods has made using higher operational cost economically feasible. Nitrogen is one the gases used in both miscible and immiscible gas injection process reservoir. In heterogeneous formations tends to breakthrough early production wells due overriding, fingering channeling. Surfactant alternating (SAG) commonly decrease this problem. Foam which formed on contact nitrogen surfactant increases viscosity injected gas. This oil–gas sweep efficiency, although adsorption rock surface can causes difficulties costs process. Many parameters must be considered design SAG One most important ratio that should optimum value improve flooding efficiency. In study, initially concentration was optimized minimization results lower surfactant. So, different sodium dodecyl sulfate (SDS) concentrations 100, 500, 1000, 2000, 3000 4000 ppm were obtain at 70 °C 144.74×105 Pa. A simple, clean relatively fast spectrophotometric method for determination based formation an ion-pair. Then effect volume secondary during execution examined experimentally. The experiments performed sand pack under certain temperature, pressure constant rate. Experiments 1:1, 1:2, 1:3, 2:1 3:1 1.2 pore injected. Then, comparisons between obtained water flooding, (WAG) processes. This study shows 1500 ppm solution practical economical. Results also show 1:1 0.2 cm3/min temperature 144.74×105 Pa, maximum removal efficiency. ratio, stable foam viscous delayed comparison other ratios. Finally, demonstrated displacement (water WAG).