轻油油田沥青和石油中沥青质中所含化合物的组成特征,Energy & Fuels

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轻油油田沥青和石油中沥青质中所含化合物的组成特征
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-01-20 , DOI: 10.1021/acs.energyfuels.0c03022
Yulia M. Ganeeva ₁ , Ekaterina E. Barskaya ₁ , Ekaterina S. Okhotnikova ₁ , Tatiana N. Yusupova ₁

Affiliation

沥青质骨料由在苯（甲苯）溶液芯中堆积良好且稳定的填料和堆积松散的外围构成，它们可以分别吸收和吸附其他油馏分。以前（iao等。能源燃料 2005，180），有人建议“封闭的化合物已受到很好的保护，免受油藏中发生的次级变质过程的影响，可以认为是原始油，而吸附的化合物却受到次级演化过程的影响。 ”。本文研究并比较了多效Bavly油田（俄罗斯）的原油和从同一油田的烃源岩床（Domanic地层）提取的沥青中沥青质的吸附和吸附化合物。发现吸附的化合物的含量可高达20％或更高，并且主要由树脂组分（主要是极性树脂）控制。对油，沥青和吸附在沥青质上的化合物的结构基团和烃组成进行了比较分析。与石油麦芽糖醇相比，正构烷烃与沥青质沥青烯的吸附化合物组成相似。在油沥青质中所含的化合物中，检测到被认为是残余烃的正构和单甲基取代的烷烃的同源性系列，而在沥青质沥青质中所含的化合物中，则发现了痕量的高分子量正烷烃和一甲基仅取代的烷烃。所获得的数据表明，吸附在沥青质上的化合物（如被封端的化合物）也可以表征原始油（原石油）的成分，并且该油与Bavly油田的沥青之间可能存在相关性。

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Features of the Composition of Compounds Trapped in Asphaltenes of Oils and Bitumens of the Bavly Oil Field

The asphaltene aggregates are made of a well-packed and stable in benzene (toluene) solution core and a loose-packed periphery, which can respectively occlude and adsorb the other oil fractions. Previously (Liao et al. Energy Fuels 2005, 180), it was proposed that the “occluded compounds have been well-protected from the secondary alteration processes that occurred in the oil reservoir and could be considered to be the original oil, whereas the adsorbed compounds have been affected by the secondary evolving processes”. In this paper, the compounds adsorbed and occluded in asphaltenes both of crude oils of the multipay Bavly oil field (Russia) and bitumens extracted from the source bed (Domanic formation) of the same oil field are studied and compared. It is found that the content of adsorbed compounds can reach up to 20% and higher and is dominated by resin components (mostly the polar resins). A comparative analysis of the structural-group and hydrocarbon compositions of oils, bitumens, and compounds adsorbed on the asphaltenes is carried out. It is found that the compounds adsorbed on oil asphaltenes are enriched with fragments of ethers, esters, and amides of acids and the high-molecular-weight n-alkanes in comparison with oil maltenes, while the composition of compounds adsorbed on bitumen asphaltenes is similar to that of bitumen maltenes. In the compounds occluded in oil asphaltenes, the homological series of normal and monomethyl substituted alkanes, which are considered to be relict hydrocarbons, are detected, while in compounds occluded in bitumen asphaltenes, the trace of high-molecular-weight n-alkanes and monomethyl substituted alkanes only. The obtained data indicate that compounds adsorbed on asphaltenes, like occluded compounds, can also characterize the composition of the original oil (protopetroleum) and that there may be a correlation between the oil and the bitumen of the Bavly oil field.

更新日期：2021-02-04

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