scholarly journals Evaluation of the aquathermolysis catalyst effect on the composition and properties of high-viscosity oil from the Strelovskoe field

2021 ◽  
pp. 90-96
Author(s):  
I. I. Mukhamatdinov ◽  
◽  
E. E. Giniyatullina ◽  
R. E. Mukhamatdinova ◽  
O. V. Slavkina ◽  
...  
Keyword(s):  
High Efficiency ◽  
Steam Injection ◽  
High Viscosity ◽  
Catalyst Precursor ◽  
Gas Composition ◽  
Laboratory Modeling ◽  
Catalytic Aquathermolysis ◽  
Iron Based ◽  
Catalyst Effect ◽  
High Viscosity Oil

The article examines the aquathermolysis process of high viscosity oil from Strelovskoe field developed by RITEK LLC using steam injection. Laboratory modeling of non-catalytic and catalytic aquathermolysis in a high-pressure reactor was performed. Laboratory tests have demonstrated the high efficiency of the iron-based oil-soluble catalyst developed at Kazan Federal University in the destruction reactions of resinous asphaltenes. Samples of the initial oil as well as products of non-catalytic and catalytic aquathermolysis in the presence of iron tallate and the solvent Asphalt-Resin-Paraffin Deposits were studied at temperatures of 200, 250 and 300°C for 24 hours. In addition, the gas composition of the oil aquathermolysis products and the viscosity-temperature characteristics of the oil samples were determined. The studies have shown that catalytic aquathermolysis has a significant effect on the changes in the composition and properties of oil from the Strelovskoe field. It was found that the presence of a catalyst contributes to decarboxylation reactions, increases the degree of desulfurization and decreases the viscosity of oil samples. Keywords: high-viscosity oil; aquathermolysis; catalyst precursor; steam thermal treatment; viscosity.

scholarly journals Hydrodynamic modeling of field development using enhanced oil recovery methods

2021 ◽  
Vol 317 (2) ◽  
pp. 14-22
Author(s):  
G.Zh. Moldabayeva ◽  
◽  
A.Kh. Agzamov ◽  
R.T. Suleimenova ◽  
D.K. Elefteriadi ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Seismic Data ◽  
Water Injection ◽  
Steam Injection ◽  
High Viscosity ◽  
Oil Fields ◽  
Borehole Data ◽  
Field Development ◽  
High Viscosity Oil ◽  
Cyclic Injection

This article discusses a digital geological model, the transfer of borehole data to the geological grid, and the modeling of the technology of alternating steam and water injection. Alternating injection involves the cyclic injection of steam and water into an injection well in high-viscosity oil fields. The essence of this technology is that during the steam injection for 2-4 months, the formation warms up, leading to a decrease in viscosity and an increase in oil mobility. Then comes the period of water injection, during which the production of already warmed oil continues and the formation pressure is maintained. For digital geological modeling, the following data were collected, processed and prepared: a list of wells that open the object of modeling, coordinates of wellheads, well altitudinal data, inclinometry of well trajectories, GМS data on wells, analysis of wells drilled with core sampling, and digitized seismic data (structural surfaces on the roof of stratigraphic horizons, parameter maps, contact surfaces, faults, structural maps on the roof of target horizons with faults, isochron maps, velocity maps).

scholarly journals Efficiency of horizontal wells in fields with highly viscous oil on the example of Tengri field

2021 ◽  
Vol 3 (2) ◽  
pp. 111-123
Author(s):  
A. S. Mardanov ◽  
R. A. Yussubaliev ◽  
A. A. Yergaliyev ◽  
A. M. Rakhmetullin
Keyword(s):  
Oil Recovery ◽  
High Efficiency ◽  
Complex Structure ◽  
Horizontal Wells ◽  
High Viscosity ◽  
Vertical Wells ◽  
Viscous Oil ◽  
Effective Development ◽  
High Viscosity Oil ◽  
Highly Viscous Oil

Due to the growing share of high-viscosity oils in Kazakhstan, task of their effective development is becoming more complicated. Development of terrigenous reservoirs that have a complex structure and contain high-viscosity oil lead to low rates of sampling and low values of oil recovery factor. Currently, technologies that ensure high efficiency in development of such deposits are very expensive. The paper considers a pilot section of the development horizon of cretaceous system of the Tengri field, drilled with vertical wells in accordance with current project document. Further the average characteristics of the parameters of horizontal wells are compared and measures are proposed to improve the efficiency of further operation of these wells.

Catalytic Aquathermolysis of High-Viscosity Oil Using Iron, Cobalt, and Copper Tallates

2018 ◽  
Vol 53 (6) ◽  
pp. 905-912 ◽  
Author(s):  
D. A. Feoktistov ◽  
G. P. Kayukova ◽  
A. V. Vakhin ◽  
S. A. Sitnov
Keyword(s):  
High Viscosity ◽  
Iron Cobalt ◽  
Catalytic Aquathermolysis ◽  
High Viscosity Oil

scholarly journals Disposal of flue gases in oil reservoirs with high-viscosity oil in order to increase oil recovery and improve the environmental situation

2019 ◽  
Vol 116 ◽  
pp. 00075
Author(s):  
Evgeniy Shchesnyak ◽  
Anatoliy Ryzhkov ◽  
Iosif Ledovich ◽  
Andrey Osipov ◽  
Artur Musin
Keyword(s):  
Carbon Dioxide ◽  
Oil Recovery ◽  
Carbon Dioxide Emissions ◽  
High Efficiency ◽  
High Viscosity ◽  
Flue Gases ◽  
Chemical Effect ◽  
Natural Bitumen ◽  
Water Steam ◽  
High Viscosity Oil

The reserves of highly viscous oils and natural bitumen are several times higher than the stocks of light oils. In the development of such oils by thermal methods, steam is produced, the development of which is accompanied by significant emissions into the atmosphere of flue gases, including carbon dioxide. According to estimates, the extraction of high-viscosity oils annually releases about 34.5 million tons of carbon dioxide into the atmosphere. However, carbon dioxide emissions from steam generation can be reduced to zero by injecting flue gases along with steam into the formation. In addition to environmental benefits, the technology of co-injection of water vapor and combustion gases (nitrogen and carbon dioxide) has a complex (thermal and physico-chemical) effect on the formation with a synergistic effect. The article is devoted to the analysis of the mechanisms affecting the increase in oil recovery during the co-injection of steam with flue gases, the description of equipment for the injection of flue gases into the reservoir, as well as the analysis of field experience in using this technology. The calculations for one of the fields of high-viscosity oil show the high efficiency of co-injection of water steam with flue gases.

Aquathermolysis of High-Viscosity Oil in the Presence of an Oil-Soluble Iron-Based Catalyst

2017 ◽  
Vol 53 (5) ◽  
pp. 666-674 ◽  
Author(s):  
A. V. Vakhin ◽  
S. A. Sitnov ◽  
I. I. Mukhamatdinov ◽  
Ya. V. Onishchenko ◽  
D. A. Feoktistov
Keyword(s):  
High Viscosity ◽  
Soluble Iron ◽  
Iron Based ◽  
High Viscosity Oil

scholarly journals Extra-Heavy Oil Aquathermolysis Using Nickel-Based Catalyst: Some Aspects of In-Situ Transformation of Catalyst Precursor

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 189
Author(s):  
Alexey V. Vakhin ◽  
Firdavs A. Aliev ◽  
Irek I. Mukhamatdinov ◽  
Sergey A. Sitnov ◽  
Sergey I. Kudryashov ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Nickel Sulfide ◽  
Batch Reactor ◽  
Saturated Hydrocarbon ◽  
Steam Injection ◽  
Oil Field ◽  
Catalyst Precursor ◽  
Catalytic Aquathermolysis ◽  
Gas Products

In the present work, we studied the catalytic performance of an oil-soluble nickel-based catalyst during aquathermolysis of oil-saturated crushed cores from Boca de Jaruco extra-heavy oil field. The decomposition of nickel tallate and some aspects of in-situ transformation of the given catalyst precursor under the steam injection conditions were investigated in a high-pressure batch reactor using XRD and SEM analysis methods. The changes in physical and chemical properties of core extracts after the catalytic aquathermolysis process with various duration were studied using gas chromatography for analyzing gas products, SARA analysis, GC-MS of saturated and aromatic fractions, FT-IR spectrometer, elemental analysis, and matrix-activated laser desorption/ionization (MALDI). The results showed that nickel tallate in the presence of oil-saturated crushed core under the injection of steam at 300 °C transforms mainly into nonstoichiometric forms of nickel sulfide. According to the SEM images, the size of nickel sulfide particles was in the range of 80–100 nm. The behavior of main catalytic aquathermolysis gas products such as CH4, CO2, H2S, and H2 depending on the duration of the process was analyzed. The catalytic upgrading at 300 °C provided decrease in the content of resins and asphaltenes, and increase in saturated hydrocarbon content. Moreover, the content of low-molecular alkanes, which were not detected before the catalytic aquathermolysis process, dramatically increased in saturates fraction after catalytic aquathermolysis reactions. In addition, the aromatics hydrocarbons saturated with high molecular weight polycyclic aromatic compounds—isomers of benzo(a)fluorine, which were initially concentrated in resins and asphaltenes. Nickel sulfide showed a good performance in desulfurization of high-molecular components of extra-heavy oil. The cracking of the weak C–S bonds, which mainly concentrated in resins and asphaltenes, ring-opening reactions, detachment of alkyl substitutes from asphaltenes and inhibition of polymerization reactions in the presence of catalytic complex reduced the average molecular mass of resins (from 871.7 to 523.3 a.m.u.) and asphaltenes (from 1572.7 to 1072.3 a.m.u.). Thus, nickel tallate is a promising catalyst to promote the in-situ upgrading of extra-heavy oil during steam injection techniques.

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