Influence of Asphaltenes on the Direction of Thermal Transformations of Heavy Oil Hydrocarbons

Voronetskaya, N. G.; Певнева, Г. С.; Korneev, D. S.; Головко, А. К.

doi:10.1134/s0965544120020103

Cited by 8 publications

(1 citation statement)

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“…Desulphurization catalysts were thoroughly discussed in a review article [27]. According to the proposed mechanism, the yield of hydrogen justifies conduction of cyclization reactions and aromatization of hydrocarbons and this path was justified in another scientific paper [28].…”

Section: Use Of Hydrogen Donorsmentioning

confidence: 99%

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

et al. 2021

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The aquathermolysis process is widely considered to be one of the most promising approaches of in-situ upgrading of heavy oil. It is well known that introduction of metal ions speeds up the aquathermolysis reactions. There are several types of catalysts such as dispersed (heterogeneous), water-soluble and oil soluble catalysts, among which oil-soluble catalysts are attracting considerable interest in terms of efficiency and industrial scale implementation. However, the rock minerals of reservoir rocks behave like catalysts; their influence is small in contrast to the introduced metal ions. It is believed that catalytic aquathermolysis process initiates with the destruction of C-S bonds, which are very heat-sensitive and behave like a trigger for the following reactions such as ring opening, hydrogenation, reforming, water–gas shift and desulfurization reactions. Hence, the asphaltenes are hydrocracked and the viscosity of heavy oil is reduced significantly. Application of different hydrogen donors in combination with catalysts (catalytic complexes) provides a synergetic effect on viscosity reduction. The use of catalytic complexes in pilot and field tests showed the heavy oil viscosity reduction, increase in the content of light hydrocarbons and decrease in heavy fractions, as well as sulfur content. Hence, the catalytic aquathermolysis process as a distinct process can be applied as a successful method to enhance oil recovery. The objective of this study is to review all previously published lab scale and pilot experimental data, various reaction schemes and field observations on the in-situ catalytic aquathermolysis process.

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Section: Use Of Hydrogen Donorsmentioning

confidence: 99%