Publications

Field "A" in South Sumatera is one of Indonesia’s older fields where Enhanced Oil Recovery (EOR) implementation is a major focus. After passing through the screening process, chemical injection is currently the best method that can be implemented and this paper shows a comparison of chemical use and which is most advantageous. Surfactant based processes can recover trapped and bypassed oil to drastically reduce interfacial tension and improve displacement efficiency. In the laboratory, the surfactant studied was using three concentrations of 0.3%, 0.5% and 1 %. The rheological test was performed to determine that the viscosity of surfactant used is greater than the oil viscosity. The filtration test is performed to determine that the surfactant doesn’t precipitate. The thermal stability test at reservoir temperature (60°C) and compatibility test is intended to determine the compatibility between surfactant and formation water. The initial plan was for surfactant to be injected in Field "A". However, based on experiments in the laboratory and literature study, the combined solution of Surfactant-Polymer is investigated. Polymers that aim to control injection water mobility by improving their viscosity can also improve sweep efficiency. Flopam3230S was used with two concentrations of 500 ppm and 1000 ppm. The key factors leading to improved performance is that surfactant ensures the emulsification of oil to facilitate production and polymer can create a slug to prevent fingering. This paper provides a feasibility study of affordable chemical injection in Indonesian fields to further understand and develop CEOR within existing operations and provide a simple explanation of EOR knowledge. This is important to improve productivity in the Oil and Gas industry in Indonesia.