Conversion of extra-heavy Ashal’chinskoe oil in hydrothermal catalytic system

Abdrafikova, Ilmira Maratovna; Kayukova, G. P.; Петров, С. М.; Рамазанова, А. И.; Мусин, Р. З.; Морозов, В. И.

doi:10.1134/s0965544115020024

Cited by 25 publications

(15 citation statements)

References 2 publications

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“…In this order, the injection of chemicals for in situ upgrading has emerged as a promising solution to produce an oil of higher quality after its interaction with catalysts in the reservoir [9]. This occurs through the decomposition of the heaviest oil components into lighter molecules by means of different reactions such as water-gas shift, steam reforming, methanation, and aquathermolysis, among others, that occur under the pressure and temperature conditions of the steam injection process [10], leading to an increase in the American Petroleum Institute (API) gravity, decreasing the sulphur content [11], and promoting an increase in saturated hydrocarbons [12].…”

Section: Of 20mentioning

confidence: 99%

Upgrading of Extra-Heavy Crude Oils by Dispersed Injection of NiO–PdO/CeO2±δ Nanocatalyst-Based Nanofluids in the Steam

et al. 2019

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The main objective of this study is to evaluate the injection of a dispersed nanocatalyst-based nanofluid in a steam stream for in situ upgrading and oil recovery during a steam injection process. The nanocatalyst was selected through adsorption and thermogravimetric experiments. Two nanoparticles were proposed, ceria nanoparticles (CeO2±δ), with and without functionalization with nickel, and palladium oxides (CeNi0.89Pd1.1). Each one was employed for static tests of adsorption and subsequent decomposition using a model solution composed of n-C7 asphaltenes (A) and resins II (R) separately and for different R:A ratios of 2:8, 1:1, and 8:2. Then, a displacement test consisting of three main stages was successfully developed. At the beginning, steam was injected into the porous media at a temperature of 210 °C, the pore and overburden pressure were fixed at 150 and 800 psi, respectively, and the steam quality was 70%. This was followed by CeNi0.89Pd1.1 dispersed injection in the steam stream. Finally, the treatment was allowed to soak for 12 h, and the steam flooding was carried out again until no more oil production was observed. Among the most relevant results, functionalized nanoparticles achieved higher adsorption of both fractions as well as a lower decomposition temperature. The presence of resins did not affect the amount of asphaltene adsorption over the evaluated materials. The catalytic activity suggests that the increase in resin content promotes a higher conversion in a shorter period of time. Also, for the different steps of the dynamic test, increases of 25% and 42% in oil recovery were obtained for the dispersed injection of the nanofluid in the steam stream and after a soaking time of 12 h, compared with the base curve with only steam injection, respectively. The upgraded crude oil reached an API gravity level of 15.9°, i.e., an increase in 9.0° units in comparison with the untreated extra-heavy crude oil, which represents an increase of 130%. Also, reductions of up to 71% and 85% in the asphaltene content and viscosity were observed.

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Section: Of 20mentioning

confidence: 99%

Upgrading of Extra-Heavy Crude Oils by Dispersed Injection of NiO–PdO/CeO2±δ Nanocatalyst-Based Nanofluids in the Steam

et al. 2019

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“…In our previous works on Ashalcha oil, intensive coke formation was observed, but at higher temperatures, in air, and with other catalysts. 18 Probably, the use of a complex of catalysts (Fe, Co, and Cu) with carboxylate ligands 63 in this work inhibits the formation and precipitation of coke.…”

Section: Resultsmentioning

confidence: 94%

Catalytic Hydrothermal Conversion of Heavy Oil in the Porous Media

et al. 2021

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In this study, the specific features of Ashal’cha heavy oil conversion were revealed. The hydrothermal catalytic experiments were carried out in a CO2 environment and in the presence of oil-soluble carboxylate metals such as Fe, Co, and Cu at the temperature of 300 °C. The results have shown that the catalyst and minerals of reservoir rocks have significant impact on the transformation behavior of group, structural group, and hydrocarbon compositions of oil. The most significant changes in the composition of heavy oil were established after hydrothermal treatment in the presence of a rock-forming additive, clay mineral (kaolin), which are reflected in a significant increase in the content of saturated and aromatic hydrocarbons and a decrease in the content of resins and asphaltenes. Furthermore, the changes in the structure of asphaltenes led to the increase of aromaticity and oxidation degrees. It was found that the catalyst metals mainly concentrate on the asphaltene structures and on the rock-forming reservoir minerals. It has been shown that the concentration of Fe increases up to 5.84% and that of Cu from 0 to 0.25% after catalytic treatment of oil with kaolin. A similar change was observed in the asphaltene content of rock extracts where Fe and Cu concentrations reach 1.38 and 0.31%, respectively, with no Co presence in asphaltene content. The number of catalytically active metals such as Ti, Fe, Cr, Mn, Co, Ni, Cu, Zr, and Ba was found in the rock obtained after the experiment and the extraction of organic matter. Moreover, a slight decrease from 2.27 to 1.93% in Fe concentration included in the catalytic complex has been established with an increase in Co and Cu concentrations, which were practically absent in the original rock, to 0.036 and 0.038%, respectively. It has been established as well that the studied metal complexes (Fe, Co, and Cu) with carboxylate ligands can penetrate not only into the pore space of the rock but also into asphaltenes, thereby allowing them to catalyze the process of heavy oil upgrading under hydrothermal conditions.

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“…It should be noted that in all our experiments on the conversion of heavy oils and OM of Domanic and other sedimentary rocks, we observed an increase in the content of saturated hydrocarbons. But in the experimental products the degree of aromaticity, as determined by IR Fourier spectroscopy data, increased [32]. According to the IR Fourier spectroscopy, we estimate the structural-group composition of the averaged molecule.…”

Section: Characteristic Of Products Of Hydrothermal Experimentsmentioning

confidence: 95%

“…On the one hand, an increase in the values of the aromaticity index can be determined by the contribution to its value of highly condensed structures of the carbene-carboides type, which are formed during the thermal decomposition of kerogen [33]. In the experimental products, the degree of condensation of aromatic hydrocarbons, resins, and asphaltenes is also increasing [21,32].…”

Section: Characteristic Of Products Of Hydrothermal Experimentsmentioning

confidence: 99%

Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

et al. 2018

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The model experiments regarding the conversion of organic matters from carbonate rock samples of Dankov-Lebedyan deposits of Zelenogorskaya area and siliceous-carbonate rocks of Semiluki-Mendym deposits of Berezovskaya area of Domanic formations of Romashkino oil field were carried out. Two types of experiments were carried out: (1) the hydrothermal treatment of rocks at a temperature of 350°C in the presence of carbonic acid and a water content of 30%; (2) pyrolysis at temperatures of 350 and 600°C in the presence of hydrogen. The yield and quality of extracted hydrocarbons from the rocks depending on the mineral composition of rocks, content and composition of organic matter, and thermal stability of kerogen under hydrothermal influences were evaluated. Application of electron paramagnetic resonance in pyrolysis processes revealed the difference in mineral content of rocks (Mn2+, SO3−, and SO2− ions) and free radicals R∗, as well as in vanadyl ion (VO2+) concentration. It is established that an increasing temperature of pyrolysis promotes the formation of new free organic radicals in rock samples: in Domanic rocks of Semiluki-Mendym deposits at 350°С and in carbonate rocks of Dankov-Lebedyan horizon at 600°С. This indicates different ability of oil-generating potential of rocks with hydrothermal and pyrolysis technologies.

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Conversion of extra-heavy Ashal’chinskoe oil in hydrothermal catalytic system

Cited by 25 publications

References 2 publications

Upgrading of Extra-Heavy Crude Oils by Dispersed Injection of NiO–PdO/CeO2±δ Nanocatalyst-Based Nanofluids in the Steam

Upgrading of Extra-Heavy Crude Oils by Dispersed Injection of NiO–PdO/CeO2±δ Nanocatalyst-Based Nanofluids in the Steam

Catalytic Hydrothermal Conversion of Heavy Oil in the Porous Media

Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

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