A Comparison of Oil Recovery from Shale Reservoirs by Huff and Puff Gas Injection Using Methane, Rich Gas, Carbon Dioxide, Nitrogen and Flue Gases
Date
2022-01-13
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Abstract
This thesis investigates the effect of Huff and Puff (H&P) gas injection on oil recovery from shale reservoirs. H&P is performed in multi-stage hydraulically fractured horizontal wells with data sets representative of the Eagle Ford shale in Texas. Different injection gases are used including methane (CH4), carbon dioxide (CO2), rich gas (70% CH4, 20% propane C3H8, plus 10% hexane C6H14), nitrogen (N2) and flue gases with different combinations of N2 and CO2; 25 cases are investigated using a compositional reservoir simulator.
The thesis also discusses some ideas regarding geologic containment of fluids in inverse order in the same structure (gas at the bottom, condensate in the middle and oil at the top), and the importance of containment for conducting successful H&P gas injection projects. The geologic containment idea is also useful for advancing the possibility of Carbon Capture, Utilization and Storage (CCUS) of the CO2 employed for H&P gas injection.
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Bao, X. (2022). A Comparison of Oil Recovery from Shale Reservoirs by Huff and Puff Gas Injection Using Methane, Rich Gas, Carbon Dioxide, Nitrogen and Flue Gases (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.)