ZHANG Xian, CHE Hongchang, LIU Yisheng, et al. Improved efficiency of in-situ combustion by application of submicro metal oxides particles[J]. Petroleum Reservoir Evaluation and Development, 2019, (4): 36-40. DOI: 10.13809/j.cnki.cn32-1825/te.2019.04.007.
Improved efficiency of in-situ combustion by application of submicro metal oxides particles
In order to identify the effect of ultra-fine transition metal catalyst on the in-situ combustion of heavy oil
thermal analysis and isoconversional method were used to evaluate the burning oxidation kinetics of three ultra-fine transition metal particles—NiO
α·Fe
2
O
3
and Co
3
O
4
. And then
one-dimensional in-situ combustion experiment was carried out by the optimized catalyst. The experimental results showed that
in the presence of Co
3
O
4
the activation energy of heavy oil decreased the m
ost
up to 41.7 %. Meanwhile
Co
3
O
4
had higher catalytic activity
that made it suitable for in-situ combustion experiment. Compared to conventional in-situ combustion
high temperature oxidation reaction of crude oil was enhanced under the catalytic condition of Co
3
O
4
. The oxygen utilization ratio increased by 6.79 %
the combustion time shortened by 11.8 %
the average temperature of the leading edge of combustion increased by 20 ℃
the maximum temperature difference of the leading edge of combustion reduced by 4 ℃
the combustion was more stable
the advance speed of the leading edge increased by 0.042 cm/min
the final oil displacement efficiency increased by 5.7 %
and the viscosity reduction rate of the produced oil increased by 7.2 %. The research results have important guiding significance for expanding the application of heavy oil recovery by in-situ combustion.
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references
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Patrick G. O. Ossai,Princewill N. Ohia,Boniface Obah,Ugochukwu I. Duru.In situ combustion methods: Applicability to heavy oil reservoirs in the Niger Delta[J].Petroleum Science and Technology,2017.
Y. Hamedi Shokrlu,Y. Maham,X. Tan,T. Babadagli,M. Gray.Enhancement of the efficiency of in situ combustion technique for heavy-oil recovery by application of nickel ions[J].Fuel,2013.
Catalytic Effects of Metallic Additives on The Combustion Properties of Crude Oils by Thermal Analysis Techniques[J].Journal of Thermal Analysis and Calorimetry,2001(3).