Fathan, Thoriqu (2024) Studi Sensitivitas Metode Water Alternating Gas Injection Di Lapangan Java Field Berdasarkan Water Co2 Ratio Menggunakan Software Tnavigator. Other thesis, Universitas Islam Riau.

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Abstract

Java Field is an offshore field that has 3 production wells and 2 injection wells. This field started production in 2015 using the waterflood method, and after 10 years of production, this field experienced a significant decline in production. Therefore, efforts are needed to increase the productivity of the Java Field which has decreased through the next stage, namely tertiary recovery or EOR. CO2 WAG is the method chosen in this field because of the effectiveness of macroscopic and microscopic sweeping, as well as the suitability of reservoir characteristics with EOR screening criteria. The effectiveness of this method can be influenced by several factors, such as slug size, soaking time, cycle time, and WAG ratio. Therefore, research was conducted in the form of a sensitivity study on one of the parameters determining the effectiveness of WAG injection in order to obtain the best scenario that can be applied to the Java Field. There are 3 scenarios tested in this study, namely 1:1, 1:2, and 2:1 with a slug size of 0.3 PV. From the results of the research that has been done, WAG injection with the most optimal ratio between CO2 and water is 1:2, with a recovery factor obtained of 30%. These results indicate that a large volume of water injection in one WAG cycle provides a better sweeping effect to push oil towards the production well.

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