Fractionation of asphaltenes for determination of their composition and structure in case of heavy oil from Ashal'cha field

Thermal EOR International Workshop III: "Thermal Methods for Enhanced Oil Recovery: Laboratory Testing, Simulation and Oilfields Applications"

Salih, I.^1 ; Mukhamatdinov, I.^1 ; Mukhamatdinova, R.^1 ; Shmeleva, E.^1

Kazan Federal University, 18 Kremlevskaya Str., Kazan, Russia^1

关键词: Aquathermolysis;    Asphaltene fractions;    Batch extraction;    Carbon-heteroatom bonds;    Catalytic hydrothermal treatment;    Cobalt-containing catalysts;    Destructive hydrogenation;    Group composition;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/282/1/012014/pdf
DOI  :  10.1088/1755-1315/282/1/012014

来源: IOP

【 摘 要 】

The asphaltene fractions from initial crude oil of Ashal'cha field were extracted for the further investigation. Moreover, the non-catalytic and catalytic products of aquathermolysis in the presence of cobalt-containing catalyst precursor and hydrogen donor dependent on treatment time were studied. Five fractions of asphaltenes and carben-carboids were obtained by batch extraction method. The catalytic hydrothermal treatment revealed a redistribution of group composition and the reduction of resins and asphaltenes because of destructive hydrogenation processes mainly on carbon-heteroatom bonds. In this paper, we have obtained comprehensive results regarding the redistribution between the asphaltene fractions (extracted by solvents with various compositions) due to catalytic aquathermolysis.