Carbon dioxide sequestration and enhanced oil recovery co-optimization

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2021-9
Akhundov, Nuri
The worldwide growth of industry leads to continuous rise of anthropogenic emission amount into the atmosphere, which causes greenhouse effect all over the world, that is heating up the atmosphere and changing the global climate. On the other hand, carbon dioxide injection into oil reservoirs for the purpose of enhancement of oil recovery (CO2-EOR) has been commercially used for nearly 50 years. The operations in petroleum sector are being carried out in a way to maximize the recovered oil while keeping the amount of CO2 injected at its minimum due to the purchase cost of carbon dioxide. To overcome the economic restrictions for CO2 sequestration during EOR, it is necessary to simultaneously maximize economic oil recovery and the volumes of CO2 injected in oil reservoirs using an engineering approach. This process is named as co-optimization. For this purpose, several simulations for different scenarios are being carried out to find the maximum amount of CO2 that can be stored, maximum amount of oil that can be produced, and an optimal point for simultaneous maximization of both numbers. Results show, that using inverted 5 spot pattern and implementing water-alternating-gas (WAG) injection can significantly contribute to the co-optimization, while other vi parameters, such as pattern area and injection rate need to be evaluated on case by case basis, considering economical factors as well.

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Citation Formats
N. Akhundov, “Carbon dioxide sequestration and enhanced oil recovery co-optimization,” M.S. - Master of Science, Middle East Technical University, 2021.