Characterization of chemical composition of high viscosity heavy oils: Macroscopic properties, and semi-quantitative analysis of molecular composition using high-resolution mass spectrometry

• DOI: 10.1016/j.petsci.2024.02.019
• Publication Date: 2024-03-04T17:27:48Z
• Authors: Jian-Xun Wu; Shuo-Fan Li; Qi-Fu Li; Feng Yan; Qi-Lin Zhou; Shuai Ma; Ya-He Zhang; Suo-Qi Zhao; Quan Shi

Heavy oil is an important resource in current petroleum exploitation, and the chemical composition information of heavy crucial for revealing its viscosity-inducing mechanism solving practical exploitation issues. In this study, techniques high-temperature gas chromatography high-resolution mass spectrometry equipped with electrospray ionization source were applied to reveal typical oils from western, central, eastern China. The results indicate that these display significant variations their bulk properties, initial boiling points all above 200 °C. Utilizing pre-treatment ESI spectrometry, analysis molecular saturated hydrocarbons, aromatic acidic oxygen compounds, sulfur basic nitrogen neutral compounds within was conducted. Ultimately, a semi-quantitative achieved by integrating elemental content. Shengli-J8 conventional Shengli crude show lacks alkanes low weight which contributes high viscosity. Additionally, characteristic sets different identified based on composition. may provide valuable reference data establishing theoretical models designing viscosity-reducing agents exploitation.