ENHANCED OIL RECOVERY USING AIR INJECTION (CO2)

petroleum and natural gas engineering

Air injection has traditionally been employed to extract heavy crude oil in the production field, however studies have shown that this practice is abandoned when light crude oil in the reservoir runs out. Therefore, in order to comprehend their potential for high-pressure air injection (HPAI) enhanced oil recovery (EOR), this work investigated the kinetics and combustion of light crude oil in-situ the reservoir. The approaches provided a precise description of the combustion and kinetics of three (3) light crude oils taken from the Canadian offshore of Newfoundland. The crude with the lowest API, 30.214, had the lowest enthalpy change, 10.9 J/g, and the highest onset oxidation temperature, 220 oC, while the crude with the highest API, 46.963, had the highest onset oxidation temperature. had the highest enthalpy (24.6 J/g), and its beginning oxidation temperature (140 oC) was the lowest. Studying the effects of 10% water saturation on one of the crude samples (Sample A), it was found that the onset oxidation temperature increased by 40 oC and the enthalpy change decreased by 9 J/g. These results showed that the flexible Differential Scanning Calorimetry thermograms may produce accurate oil recovery results with good correlation coefficients (r > 0.9) when combined with kinetic modeling technique. Then, accurate thermo-kinetic parameters might be provided using this trustworthy information, such as the onset, peak, and endset temperatures and their corresponding heat flow patterns. kinetic triplets like the reaction model, pre-exponential, and activation energy Accurate reservoir screening requirements for an air injection EOR process can also be determined. Then, using ARC, mine tailings with a high pyrrhotite content were utilized as a catalyst to examine its impact on the temperature at which the crude iol begins to oxidize. When tailings made up 20% of the crude oil, the average beginning oxidation temperature dropped from 148 oC to 116 oC. A high conversion rate in the crude oil oxidation reaction as well as the production of miscible flu gas, which favored an automated oil recovery process, are also indicated by the fact that it had the largest oxidation temperature range of 63 oC between the onset and endset temperatures and the highest pressure drop of 2.4 bar.

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