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原油混合过程中沥青质沉淀动力学过程及其对原油蜡行为的影响研究

Study on the Kinetic Process of Asphaltene Precipitation during Crude Oil Mixing and Its Effect on the Wax Behavior of Crude Oil.

作者信息

Lei Yun, Yu Pengfei, Ni Wenqiang, Peng Haoping, Liu Yang, Lv Xiaofang, Zhao Huijun

机构信息

Jiangsu Key Laboratory of Oil and Gas Storage & Transportation Technology, Changzhou University, Changzhou 213164, Jiangsu, China.

Sinopec Marketing Central China Company, Wuhan 430000, Hubei, China.

出版信息

ACS Omega. 2021 Jan 7;6(2):1497-1504. doi: 10.1021/acsomega.0c05121. eCollection 2021 Jan 19.

DOI:10.1021/acsomega.0c05121
PMID:33490809
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7818607/
Abstract

As an important component of crude oil, asphaltene precipitation and deposition are harmful to petroleum production and processing. In previous research, the impacts of asphaltene precipitation on crude oil characteristics were preliminarily explored. In this paper, by mixing different types of crude oil, the dynamic process of asphaltene precipitation and its effect on the crystallization and gelation behaviors of mixed crude oil were in-depth analyzed and discussed using the high-speed centrifugation technique, microscopic observation, differential scanning calorimetry (DSC) thermal analysis, and rheological test. The results showed that the asphaltene precipitation mainly occurred in the early stage of crude oil mixing and was influenced by crude oil composition. As the precipitation time increased, the driving force for asphaltene precipitation was gradually weakened until a dynamic equilibrium between asphaltene precipitation and dissolution was reached. Meanwhile, once the asphaltene precipitation occurred, the crystallization and gelation processes of crude oil were significantly affected. It was discovered that the change in the existing state of asphaltenes due to their precipitation is an important factor affecting the interaction of asphaltenes and waxes, which is critical for the technological development of oil and gas flow assurance.

摘要

作为原油的重要组成部分，沥青质的析出和沉积对石油生产与加工有害。在以往研究中，已初步探讨了沥青质析出对原油特性的影响。本文通过混合不同类型的原油，运用高速离心技术、显微镜观察、差示扫描量热法（DSC）热分析以及流变学测试，深入分析和讨论了沥青质析出的动态过程及其对混合原油结晶和凝胶行为的影响。结果表明，沥青质析出主要发生在原油混合的早期阶段，并受原油组成的影响。随着析出时间的增加，沥青质析出的驱动力逐渐减弱，直至达到沥青质析出与溶解之间的动态平衡。同时，一旦沥青质发生析出，原油的结晶和凝胶过程会受到显著影响。研究发现，沥青质因析出导致的存在状态变化是影响沥青质与蜡相互作用的重要因素，这对油气流动保障技术的发展至关重要。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/4d3eb72911a7/ao0c05121_0011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/6a8c45293a7c/ao0c05121_0002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/bd830dbbeb60/ao0c05121_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/abd25504e3fd/ao0c05121_0007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/12875703c133/ao0c05121_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/4d3eb72911a7/ao0c05121_0011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/6a8c45293a7c/ao0c05121_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/7dbe60835110/ao0c05121_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/0ae1f53725b5/ao0c05121_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/9c374000c334/ao0c05121_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/bd830dbbeb60/ao0c05121_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/abd25504e3fd/ao0c05121_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/c9f100b6539c/ao0c05121_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/1415b6d6ec52/ao0c05121_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/12875703c133/ao0c05121_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3637/7818607/4d3eb72911a7/ao0c05121_0011.jpg

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本文引用的文献

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Rheology modification in mixed shape colloidal dispersions. Part II: mixtures.混合形状胶体分散体的流变学改性。第二部分：混合物。
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Low-Temperature Pack Aluminization Process on Pipeline Steel To Inhibit Asphaltene Deposition.低温条件下管道钢的渗铝处理对沥青质沉积的抑制作用
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