Perpustakaan Digital ITB

Surfactant flooding has for several years been recognized as having a significant potential with respect to increasing oil recovery. Many researches have been conducted to investigate surfactant effectiveness either on a laboratory scale or a field scale. However there are still very little studies dealing with effect of surfactant on well inflow performance. It is predicted that there will be a well productivity improvement obtained as a result of the surfactant injection. An increase of well performance which is represented by productivity improvement term is the main objective addressed in this thesis. A single well reservoir modeling is built to determine the surfactant injection effect on well productivity. To observe the well productivity changes, huff and puff method is selected as the most representative method, and then, comparison of two main scenarios - before and after surfactant injection – productivity index is analyzed. Furthermore, through a parametric study, the important controlling parameters towards productivity improvement after surfactant injection are identified using an extensive sensitivity analyses. The results indicate that there are well productivity improvement observed after surfactant injection which are controlled by several parameters. All controlling parameters are then correlated to well productivity index in new empirical equation to represent the general effect of related parameters to well productivity changes. The new equation is beneficial to determine an optimum surfactant properties as well as slug volume and time soaking. In conclusion, by using this new equation, the application of surfactant huff and puff method in production well is expected to be simpler.