Hasian P. Septoratno Siregar
With low oil prices at this time, efforts must be directed at optimizing current production and looking for the right EOR method and cost-effective. One of the most cost-effective methods compared to thermal / chemistry, is the use of water and gas available. Hydrocarbon gas produced is often burned / disposed of because it is not economical for sale or its own production and its positive impact on production, but this practice is now systematically reduced due to strict environmental regulations. CO2 emissions are also a growing concern and the release to the atmosphere needs to be reduced. These worries encourage efforts to re-schedule hydrocarbons and CO2 to the reservoir in the form of EOR or CO2 storage. The purpose of this study is to compare the gas injection method and its variant, water Alternative gas injection in terms of oil recovery performance. Three conceptual geological models and two three-component fluid models are built for this purpose. Impact of injection parameters such as snail size, wag ratio, injection rate and injection pressure, reviewed using sensitivity studies. Simulation studies show that the WAG significantly increases the efficiency of sweep, delaying breakthroughs and thus increasing recovery compared to continuous gas injection. The use of N2 in this study aims to test proper alternatives if CO2 gas sources and hydrocarbons are not geographically close to support the project economy. N2 can be produced on location and is released from the gas sales at a low cost.
Application of appropriate technology
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