Discover of GWLI as chemical flooding using SIT: experiment and analysis on key influence factor for oil recovery improvement

[摘要] Spontaneous Imbibition Test (SIT) is regarded as an important mechanism of oil recovery by water-flood, particularly in heterogeneous or fractured reservoirs where direct displacement of oil by water is usually poor. In this paper a new chemical technology (i.e. Gaberoun Water Lake Injection (GWLI)) has been discovered. It has several advantages which are relatively cheap and reliable. It potentially would have a wide range of applications in brine injection such as altering the rock wettability and responsible for increased ultimate recovery. Two stages of GWLI were discussed with changing pH and salinity. The first stage was used the core samples from carbonate and sandstone, which aged in oil for long time period. The second stage was used the core samples, which aged in oil for short time period. SIT was performed at 27, 30, 40, 50, 60 and 70°C with sandstone and carbonate rock with different aging time. The result showed that the oil recovery was decreased with a decrease in pH values and increased with a decrease salinity. However, the oil recovery in the long aging process was low comparing to the short aging process. The findings in this research that GWLI can be used for oil recovery processes.

[发布机构] Petroleum Engineering of Faculty of Mining and Energy, Sebha University, Indonesia^1;Chemistry Engineering, Faculty of Science, Sebha University, Indonesia^2;Mechanical Engineering, Faculty of Engineering, Misurata University, Indonesia^3

[效力级别] 矿业工程

[关键词] Brine injection;Chemical flooding;Chemical technologies;Experiment and analysis;Fractured reservoir;Oil recovery process;Rock wettability;Spontaneous imbibition