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With the decrease of production in conventional oil and gas resources, increasing attention is turning toward nonconventional oil sources to relieve the pressure caused by the lack of conventional stocks. Heavy oil and natural bitumen as two of the alternative sources are perhaps the most readily available to meet short- and long-term needs. As is well known, the physical and chemical properties of heavy oil and natural bitumen are quite different from conventional oils. Major differences include low content of th...

In-situ combustion is an effective thermal recovery process for heavy oils and natural bitumen. It is widely accepted what the success of an in-situ combustion depends on a stable combustion front. However, field and laboratory data show that combustion front is often unstable, which severely limits the wide application of in-situ combustion technique. The goal of this work is to develop oil-soluble metal-based catalyst to improve the combustion behavior of heavy oils, and thus achieve a stable combustion front. I...

Within the eastern Siberian platform are known objects worth mentioning from the standpoint of organizing the extraction of heavy oil and bitumen. The Siberian platform is characterized by a wide spreading of the surface-bearing and shallow-lying rocks saturated with products of hypergenic oil conversion. The article describes the results of lithologic and petrographic studies of bitumen-saturated carbonate rocks of Anabar anteclise southern slope (Daldyno-Alakit region). The upper part of the section of the sedim...

Asphaltenes extracted from a sample of high-viscosity oils from the Ashalchinskoye deposit of the Republic of Tatarstan and the Boka de Haruko deposit of the Republic of Cuba, as well as a sample of oxidized road bitumen of the BND 50/70 grade produced by TAIF-NK of the Republic of Tatarstan. Five fractions of asphaltenes of these oils and petroleum products were obtained by stepwise extraction with an alcohol-benzene solvent with different alcohol content after precipitation of asphaltenes from oil with hot isooc...

Asphalt-resin-paraffin deposits deposited in the extraction of oils considered difficult to recover are investigated. Specific features of asphalt deposition of resin-paraffin deposits, caused by different content of high-molecular components in them and their properties, are revealed. Redistribution of petroleum paraffin hydrocarbons and asphaltenes between oil and asphalten-resin-paraffinic deposits deposited from them is shown. The process of precipitation of high-molecular components from heavy oil under dynam...

In order to exclude the unprofitability of heavy oil deposits development in Russia and abroad, it is necessary to search and create new more advanced technologies for heavy oil and bitumen deposits development aimed at improving and creating technologies for increasing oil recovery, which allow developing fields with the greatest economic efficiency. This is due to both the structure of "unconventional" oil reserves and the need for more complete production of hydrocarbon reserves with sufficient high production ...

Year by year, the growth of the share of heavy oils in the total volume is steadily increasing. For development of highly effective methods for its processing, approaches to modelling their properties should be elaborated. This thesis is dedicated to deriving and substantiating a formula for calculation of the velocity field in the round pipe volume as adjusted for rheological features of the flow of heavy oil suspensions. The suggested approach is based upon rheodynamics equations reflecting the flow of a rheolog...

Some of the most promising areas for the extraction of heavy oil, maltha and asphalt in the eastern part of the Siberian platform are the southern and southeastern slopes of the Anabar anteclise. Using solvents for mining heavy oil and natural bitumen in a permafrost zone is the only option to steam injection, which is obviously cost ineffective there. Advantages of the solvents include convenience of transportation to field and storage stability. Moreover, the solvents have sufficiently high solubility with respe...

In this research the regularities of heavy oil conversion in supercritical water and the presence of finely dispersed caustobioliths and metal oxides were shown. The process of thermo-catalytic conversion was carried out in a closed reactor under temperature and pressure conditions, providing the transition of the aqueous phase in supercritical fluid. To investigate the selectivity of catalysts, different compositions of catalyst systems were prepared and studied for their effectiveness in the process of degradati...

Vanadium and nickel exist in oils as porphyrin complexes. Metalloporphyrins are concentrated in the asphaltene-resinous part of the oil, while the maximum content of vanadium and nickel is accounted for by asphaltenes. Up to the present time, information about features of content and distribution of vanadium, nickel, and the types of the corresponding metal complexes in asphaltenes and resins of heavy oils and natural bitumens has a disparate and non-systemic character. In this work, composition and distribution o...