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The formation of the composition of unrecovered oils in producing oil fields of Tatarstan
Abstract Analysis of the composition of unrecovered and produced oils of Tatarstan shows that the adsorption-chromatographic process upon oil motion in the reservoir during recovery is manifested in an increase in the density and viscosity of unrecovered oils. They do not contain light hydrocarbons of the IBP −200°C fraction and have dramatically smaller concentrations of both the least polar lube oil hydrocarbons and alcohol-benzene-extractable resins exhibiting the highest polarity. According to GLC data, unrecovered and produced oils are classified with different subtypes of chemical type A1 of nonbiodegraded oils: produced oils are grouped with subtype 1 and unrecovered oils are attributed to subtype 2. The dynamics of the development of areas of produced oils with the use of a technique based on the activation of reservoir microflora showed that the process of the microbiological oxidation manifests itself in the preferential ability of reservoir microflora to digest C12-C34 n-alkane hydrocarbons as compared to cyclic hydrocarbons. Normal C12-C20 alkanes are consumed by bacteria before hydrocarbons with a greater number of carbon atoms C20-C34 of this series. An analysis of extracts from aqueous infusions of oils showed that the dissolution process leads to the transfer of 0.04–0.07 wt % hydrocarbons and heteroatomic components from oil to water.
The formation of the composition of unrecovered oils in producing oil fields of Tatarstan
Abstract Analysis of the composition of unrecovered and produced oils of Tatarstan shows that the adsorption-chromatographic process upon oil motion in the reservoir during recovery is manifested in an increase in the density and viscosity of unrecovered oils. They do not contain light hydrocarbons of the IBP −200°C fraction and have dramatically smaller concentrations of both the least polar lube oil hydrocarbons and alcohol-benzene-extractable resins exhibiting the highest polarity. According to GLC data, unrecovered and produced oils are classified with different subtypes of chemical type A1 of nonbiodegraded oils: produced oils are grouped with subtype 1 and unrecovered oils are attributed to subtype 2. The dynamics of the development of areas of produced oils with the use of a technique based on the activation of reservoir microflora showed that the process of the microbiological oxidation manifests itself in the preferential ability of reservoir microflora to digest C12-C34 n-alkane hydrocarbons as compared to cyclic hydrocarbons. Normal C12-C20 alkanes are consumed by bacteria before hydrocarbons with a greater number of carbon atoms C20-C34 of this series. An analysis of extracts from aqueous infusions of oils showed that the dissolution process leads to the transfer of 0.04–0.07 wt % hydrocarbons and heteroatomic components from oil to water.
The formation of the composition of unrecovered oils in producing oil fields of Tatarstan
Petrova, L. M. (Autor:in) / Romanov, G. V. (Autor:in) / Foss, T. R. (Autor:in) / Abbakumova, N. A. (Autor:in)
Petroleum Chemistry ; 48 ; 254-259
01.07.2008
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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