Effect of decalin as hydrogen-donor for in-situ upgrading of heavy crude oil in presence of nickel-based catalyst

Numerous studies have contributed to a better understanding of the in-situ combustion process that have allowed to determine the most suitable conditions to carry out this process in reservoirs from volatile to extra-heavy crude oils. One of the elements that alter the behavior of this process is the compositional gradient. In this work, the effects of areal compositional variations in the in-situ combustion of three Mexican extra-heavy crude oil samples obtained from the same reservoir and extracted under similar production conditions were studied. Physicochemical, thermal, and kinetics analyses (by means of one non-linear method) were carried out to study the areal compositional variations of the extra-heavy crude oil samples, and their effect on the in-situ combustion of this type of crude oil was also analyzed. Physicochemical characterization includes measurements of viscosity, density, water content, and SARA content. Thermal analyses were performed using three heating rates (5 °C/min, 10 °C/min, and 15 °C/min), while kinetic analyses were calculated using Friedman’s method.

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The Effect of Carbon-Supported Nickel Nanoparticles in the Reduction of Carboxylic Acids for in Situ Upgrading of Heavy Crude Oil

Energy & Fuels ◽

10.1021/acs.energyfuels.7b00809 ◽

2017 ◽

Vol 31 (6) ◽

pp. 6045-6055 ◽

Cited By ~ 17

Author(s):

Kun Guo ◽

Yahe Zhang ◽

Quan Shi ◽

Zhixin Yu

Keyword(s):

Crude Oil ◽

Carboxylic Acids ◽

Nickel Nanoparticles ◽

Heavy Crude Oil ◽

Heavy Crude

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Characteristics of Newly Isolated Geobacillus sp. ZY-10 Degrading Hydrocarbons in Crude Oil

Polish Journal of Microbiology ◽

10.5604/01.3001.0009.2120 ◽

2015 ◽

Vol 64 (3) ◽

pp. 253-263 ◽

Cited By ~ 6

Author(s):

Yumei Sun ◽

Zhanguo Ning ◽

Fan Yang ◽

Xianzhen Li

Keyword(s):

Crude Oil ◽

Cellular Fatty Acid ◽

Short Chain ◽

Heavy Crude Oil ◽

16S Rdna Sequence ◽

Carbohydrate Fermentation ◽

Heavy Crude ◽

Production Tolerance ◽

Long Chain

An obligately thermophilic strain ZY-10 was isolated from the crude oil in a high-temperature oilfield, which was capable of degrading heavy crude oil. Phenotypic and phylogenetic analysis demonstrated that the isolate should be grouped in the genus Geobacillus, which shared the highest similarity (99%) of the 16S rDNA sequence to Geobacillus stearothermophilus. However, the major cellular fatty acid iso-15:0 (28.55%), iso-16:0 (24.93%), iso-17:0 (23.53%) and the characteristics including indole production, tolerance to NaN3 and carbohydrate fermentation showed some difference from the recognized species in the genus Geobacillus. The isolate could use tridecane, hexadecane, octacosane and hexatridecane as sole carbon source for cell growth, and the digesting rate of long-chain alkane was lower than that of short-chain alkane. When the isolate was cultured in the heavy crude oil supplement with inorganic salts and trace yeast extract, the concentration of short-chain alkane was significantly increased and the content of long-chain alkane was decreased, suggesting that the larger hydrocarbon components in crude oil were degraded into shorter-chain alkane. Strain ZY-10 would be useful for improving the mobility of crude oil and upgrading heavy crude oil in situ.

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