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EFFECT OF TRIPOLI OF THE PERVOMAYSKOE FIELD ON THE HEAVY CRUDE OIL COMBUSTION BY HP-DSC
Abstract
In situ combustion (ISC) method is considered as a relatively inexpensive and effective method for enhanced oil recovery (EOR). It can achieve a very high oil recovery factor due to a significant increase of pressure and temperature during the combustion process of crude oil. Over the last ten years, high pressure differential scanning calorimetry (HP-DSC) has been widely used for understanding the oxidation process of heavy oil. In this paper, HP-DSC experiments were carried out to investigate the alteration of combustion behavior of Iraq heavy oil by addition of Pervomaysky tripoli. In general, for the oxidation process two obvious exothermic reaction intervals were observed for Iraq pure oil and for the mixture: low-temperature oxidation (LTO) and high-temperature oxidation (HTO). It can be seen that the addition of Pervomaysky tripoli shifted both LTO and HTO peaks into lower temperatures to 255 ?C and 398 ?C from 263 and 437 ?C, respectively. Especially, it showed a stronger promotion on the HTO, which means that the presence of Pervomaysky tripoli might promote the formation of fuel and its combustion in high-temperature range. This implies that Pervomaysky tripoli is favorable for the stability of combustion front in an ISC process.
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