Huang Huirong, Wang Daqing, Liu Huishu, Duan Jimiao, Huang Qian, Long Xueyuan, Meng Jiang, Qi Zhilin, Gong Jing
School of Petroleum Engineering, Chongqing University of Science and Technology, Chongqing 401331, China.
College of Mechanical and Transportation Engineering, China University of Petroleum Beijing, Beijing 102249, China.
ACS Omega. 2025 Apr 7;10(15):15065-15074. doi: 10.1021/acsomega.4c10540. eCollection 2025 Apr 22.
The high content of heavy components and poor fluidity of heavy oil present a substantial challenge to its efficient transportation in the petroleum industry. Diluting heavy oil with light oil is one of the approaches utilized to improve its fluidity. However, existing research has given relatively little attention to the deposition behavior of blended crude oil. In this study, a loop experiment device was systematically employed to investigate the effects of light oil components, the blending oil ratio, and properties on the deposition of diluted heavy oil. The wax, resin, asphaltene, and carbon contents of the deposits were analyzed using four components analysis and high-temperature gas chromatography. The results indicated that a higher content of wax, resin, and asphaltene in light oil led to an increase in the wax appearance temperature and the deposit thickness of the blended oil. Additionally, a reduction in the light oil ratio was associated with an increase in deposit thickness. When analyzing the deposit components, an upward trend was observed in the wax content and average carbon number. A discussion on the interaction mechanism was carried out, suggesting that the molecular diffusion and aging effect were accountable for the variations in both the thickness and composition of the deposits in the blended system. This research contributes to a deeper understanding of the transportation of heavy oil diluted with light crude oil.
重油中重组分含量高且流动性差，这对其在石油工业中的高效运输构成了重大挑战。用轻油稀释重油是提高其流动性的方法之一。然而，现有研究对混合原油的沉积行为关注相对较少。在本研究中，系统地采用了环路实验装置来研究轻油组分、混合油比例和性质对稀释重油沉积的影响。使用四组分分析和高温气相色谱法分析沉积物中的蜡、树脂、沥青质和碳含量。结果表明，轻油中蜡、树脂和沥青质含量较高会导致混合油的析蜡点温度和沉积物厚度增加。此外，轻油比例降低与沉积物厚度增加有关。在分析沉积物成分时，蜡含量和平均碳数呈上升趋势。对相互作用机制进行了讨论，表明分子扩散和老化效应是混合体系中沉积物厚度和组成变化的原因。本研究有助于更深入地理解轻质原油稀释重油的运输过程。
