Recovery of light oil by air injection at medium temperature: Experiments

Gargar, N. Khoshnevis; Mailybaev, Alexei A.; Marchesin, D.; Bruining, Hans

doi:10.1016/j.petrol.2015.05.017

Cited by 15 publications

(6 citation statements)

References 44 publications

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“…The changes in the saturate, aromatic, resin, and asphaltene (SARA) components during the reaction were analyzed using liquid chromatography. The saturated hydrocarbons are not affected by the reaction, and the resin content decreases, which is consistent with the results from Babu et al In recent experiments on saturate (pure hexadecane) carried out by Gargar et al, it was demonstrated that the oxygen fraction tended to decrease and that the CO and CO 2 fractions increased until the temperature reached 200 °C. This result shows that the pure saturate could react with air at medium temperature.…”

Section: Resultssupporting

confidence: 89%

Experimental Study on the Safety of Exhaust Gas in the Air Injection Process for Light Oil Reservoirs

Liu

Feng

et al. 2016

Energy Fuels

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Air injection is a very important technique that is used to enhance the recovery of light oil. To investigate the safety of exhaust gas in an air injection process for light oil reservoirs, static low-temperature oxidation experiments were carried out on oil samples from a block of the Liaohe oilfield in northeast China. The effects of the temperature (80−140 °C) and pressure (10−20 MPa) on the oxygen content of the exhaust gas were studied. It was found that the oxygen consumption rate increases with the temperature. When the temperature rises to 130 °C, the oxygen content in the exhaust gas is much lower than the theoretical calculation of the safe oxygen content, and when the temperature reaches 140 °C, it is nearly exhausted. The effect of the pressure on the oxygen consumption rate is extremely low. Using a component analysis of the crude oil prior to and after the reaction, we observe that aromatic hydrocarbons are barely involved in the reaction at temperatures less than 120 °C. However, when the temperature increases above 130 °C, the aromatic hydrocarbons contribute to the reaction, which results in a large amount of oxygen consumption. Therefore, if the temperature can be controlled within 130−140 °C during the air injection process at the Liaohe oilfield, the oxygen content of the exhaust gas will remain in a safe range.

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Section: Resultssupporting

confidence: 89%

Experimental Study on the Safety of Exhaust Gas in the Air Injection Process for Light Oil Reservoirs

Liu

Feng

et al. 2016

Energy Fuels

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“…The oxidation of one light oil, one medium oil, and two heavy oils with different asphaltene contents was investigated by HP-DSC under the same conditions in our previous work . The oxidation process of all four crude oils at 5 MPa is completed at about 500 °C (Figure in ref ), and the whole process includes three main stages: LTO, a transition stage (named fuel deposition or middle-temperature oxidation), and HTO. ,,− For medium and light oils, heat release (HR) in LTO is much higher than that in HTO. For heavy oils, it mainly depends on the content of asphaltenes.…”

Section: Resultssupporting

confidence: 89%

Catalytic Oxidation of Alkanes by Organometallics in an In Situ Combustion Process

Yuan

Emelianov

et al. 2022

Energy Fuels

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The complicated composition of crude oils increases the difficulties in understanding their complex oxidation mechanism and catalysis in an air injection enhanced oil recovery (EOR) process, which therefore makes it necessary to use oil components as study objects. In this work, n-hexadecane (C16H34) was used as the representative of saturates to study its catalytic oxidation using oil-dispersed organometallics as catalysts. Its exothermic reaction behavior and kinetics during the oxidation process were analyzed. The catalytic effect of Co-, Cu-, and Fe-based organometallics on these exothermic reaction behaviors and kinetics was evaluated and compared to decide which metal has a higher catalytic activity for alkane oxidation. The results indicated that the onset temperature of exothermic reactions was shifted from 210 to 172, 181, and 190 °C and the first reaction peak was shifted from 219 to 186, 196, and 201 °C by Co-, Cu-, and Fe-based organometallics, respectively. This indicates that Co-, Cu-, and Fe-based organometallics can promote the initial oxidation of alkanes and shift the reaction interval to lower temperatures. In addition, these organometallics can significantly reduce the activation energy of the oxidation process of C16H34, which thus alters the pathways of chain-branching reactions. This research is the start of investigating catalytic oxidation of crude oil by organometallics using pure oil components. The findings not only provide theoretical basis to understand the catalytic effect on each oil component by organometallics but also give an indication about in which case these organometallics should be used for which purpose in air injection EOR processes.

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“…There has been recent progress in the development of the mathematical theory for the recovery mechanism of light oil by air injection at medium pressures [32,33], which was confirmed by numerical simulations [20] and by laboratory experiments [22]. Note that air injection can be very effective even in heterogeneous light oil reservoirs, as the oil evaporates away from low permeability parts to be collected at higher mobility streaks.…”

Section: Introductionmentioning

confidence: 78%

“…There is high temperature oxidation (HTO) [30,31], in which cracking occurs forming coke, which is subsequently oxidized at high temperatures, and low temperature oxidation (LTO), in which the oxygen is absorbed or incorporated by the hydrocarbon molecules to form alcohols, aldehydes, acids, or other oxygenated hydrocarbons [16,17,19]. The LTO may be followed by complete scission of molecules into small reaction products such as water, CO, or CO 2 [14,17,18,22].…”

Section: Introductionmentioning

confidence: 99%

Oxidation wave structure and oxygen breakthrough for air injection into light oil reservoirs

2016

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This paper combines analytical and numerical studies of light oil recovery by air injection. We investigate in detail the internal structure of oxidation fronts in two-phase flow in a porous medium, taking into account reaction, vaporization, and condensation of liquid fuel, with longitudinal heat conduction. Our solution shows that between regimes of total and partial oxygen consumption there is a change in the oxidation wave, which may have negative implications for oxygen breakthrough in light oil recovery process. In spite of the simplifications used to derive the analytical solution, the latter agrees with direct numerical simulations. Finally, based on our analytical solution, we provide a phase diagram to predict conditions for total or partial oxygen consumption in light oil recovery process.

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Recovery of light oil by air injection at medium temperature: Experiments

Cited by 15 publications

References 44 publications

Experimental Study on the Safety of Exhaust Gas in the Air Injection Process for Light Oil Reservoirs

Experimental Study on the Safety of Exhaust Gas in the Air Injection Process for Light Oil Reservoirs

Catalytic Oxidation of Alkanes by Organometallics in an In Situ Combustion Process

Oxidation wave structure and oxygen breakthrough for air injection into light oil reservoirs

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