OPTIMIZATION OF THERMAL ENHANCED OIL RECOVERY (EOR) WITH SURFACTANT INJECTION Astra A. Pramana, Prilly A. Ayudita, Dara A. Maharsi
Petroleum Engineering Dept., Universitas Pertamina, Jakarta, Indonesia
Abstract
Indonesia has abundant amount of viscous of oil which need to be produced by decreasing the viscosity through thermal (steam) injection. This research is based on reservoir simulations using EOR thermal method, specifically steam flood with surfactant injection addition. The simulations were performed using three scenarios to get important parameters such as oil recovery factor (RF), oil rate, and steam oil ratio. The simulation was carried out using a reservoir engineering software. The first scenario was done by injecting water, while the second one was done by injecting steam. The third scenario was done by combination of both a 6 month injection of steam followed by surfactant injection. The first scenario only gave an RF of 3.8% while the second gave an RF of 46%. The most optimum result was found from the third scenario, which gives an RF of 68% with highest oil rate of 4000bbl / day. The reason behind the success of the third scenario is because of capability of surfactant in altering the reservoir rock^s wettability and decrease the interfacial tension between the hot less viscous oil and hot water.
