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|Title:||Air injection potential in Kenmore oilfield in Eromanga Basin, Australia: A screening study through thermogravimetric and calorimetric analyses|
|Citation:||Proceedings of the 16th SPE Middle East Oil and Gas Show and Conference, 2009: pp.1-8|
|Conference Name:||SPE Middle East Oil and Gas Show and Conference (16th : 2009 : Kingdom of Bahrain)|
|Hemanta Sarma and Shyamol Das|
|Abstract:||Although air injection process has been a proven low-cost EOR technique for tight high-temperature light-oil reservoirs elsewhere, there has not been any Australian field application even though several reservoirs appear to meet the screening criteria for the process. Moreover, air injection could be a more attractive alternative for reservoirs that are amenable to hydrocarbon gas processes, thus freeing “cleaner and greener” gases for use for energy resource. Moreover, unlike most EOR processes, the air injection process does not require water, a scarce natural resource in Australia. In this screening stud, y Kenmore oilfield in Eromanga Basin operated by Beach Petroleum has been chosen as the candidate oil. Kenmore reservoir is a 1395-m deep tight (4.4mD) light-oil (48.7°API) reservoir at 92°C. As the process feasibility depends primarily on the oxidation characteristics of the oil and its ability to sustain the ignition front during the process, the first step undertaken is the thermogravimetric and calorimetric characterization of Kenmore oil to (i) identify the temperature range over which the oil reacts with oxygen, (ii) examine the oxidation behavior within the temperature range identified, and (iii) evaluate the mass loss characteristics during the oxidation. A series of thermogravimetric analysis (TGA) and pressurized differential scanning calorimetric (DSC) tests were conducted on Kenmore oil. Tests showed two distinct exothermic reactivity regions of temperatures within 200-340ºC and 360-450ºC, with an 85-95% mass loss when the temperature reached 450ºC. Endothermic reactions are attributed to evaporation, distillation, and thermolysis; whereas exothermic reactions are due to low temperature oxidation, pyrolysis, and high temperature oxidation. It was observed that at an elevated pressure resulted in accelerated the bond scission reactions, a positive sign as far as the application of the air injection process is concerned; for, it suggests that Kenmore oil has the oxidation potential under high pressure air injection.|
|Appears in Collections:||Australian School of Petroleum publications|
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