Date of Graduation
Statler College of Engineering and Mineral Resources
Petroleum and Natural Gas Engineering
Depleted gas-condensate reservoirs are becoming important targets for carbon dioxide sequestration. Since depleted below the dew point, retrograde condensate has been deposited in the pore system and may be temporarily or permanently trapped in the reservoir, causing severe reductions in gas production rates and the permanent loss of a large portion of the volatile and valuable condensate liquids. Carbon dioxide injection in the depleted gas-condensate reservoirs may allow enhanced condensate recovery by liquid revaporization and reservoir repressurization or pressure maintenance.;The purpose of this research study was to develop a gas-condensate reservoir model using a compositional simulator to investigate the impact carbon dioxide injection on enhanced condensate recovery and to determine the increase in the amount of carbon dioxide being sequestered due to condensate recovery. A practical injection schedule was developed where carbon dioxide is both used in repressuring the depleted reservoir followed by cycling in order to achieve an effective and efficient enhanced recovery schedule.;The injection schedule has shown to increase recovery by 63% and achieve a total liquid recovery of more than 90%. Also, enhanced condensate recovery has shown to increase the amount of carbon dioxide being sequestered into a depleted gas-condensate reservoir by 15%.
Ramharack, Richard M., "Impact of carbon dioxide sequestration in depleted gas-condensate reservoirs" (2010). Graduate Theses, Dissertations, and Problem Reports. 2136.