石油化工高等学校学报2025，Vol.38Issue(2)：10-20,11.DOI:10.12422/j.issn.1006-396X.2025.02.002
油井堵塞成因分析及对堵塞物中沥青质性质研究
Analysis of Wellbore Blockage Causes and Study on the Asphaltene Properties in Blockage Materials
摘要
Abstract
To address the challenge of wellbore blockage during the development of a certain oilfield,Y3 crude oil was taken as the research object.Laboratory experiments were conducted to analyze the composition of the crude oil and the main components of wellbore blockage materials.Toluene extraction was performed on formation blockage materials collected from the oilfield,and XRD was used to analyze the composition of toluene-insoluble substances.The soluble fraction was separated into four components,with a focus on studying the composition and properties of asphaltenes in the soluble fraction and Y3 oil samples.Through asphaltene adsorption experiments,oil-water interfacial tension,underwater contact angle,etc.,were measured to explore the effects of asphaltene polarity and aromaticity on interfacial properties.The experimental results show that the main minerals of the formation blockage of the wellbore are quartz,feldspar,calcite,etc.Compared with the asphaltene in Y3 crude oil,the asphaltene in the blockage has higher molecular weight,heteroatomic mass fraction and aryl carbon ratiowith minimal wax content in blockage materials.The main cause of wellbore blockage was the adsorption of asphaltenes on sandstone.The heteroatom mass fraction and polarity of asphaltenes had significant effects on adsorption capacity and interfacial tension.关键词
井筒堵塞/沥青质/沉淀成因/蜡/地层砂石Key words
Wellbore blockage/Asphaltene/Precipitation formation/Wax/Dinas分类
石油、天然气工程引用本文复制引用
刁大龙,杜新娟,冯海顺,张欣莹,王继乾,张龙力..油井堵塞成因分析及对堵塞物中沥青质性质研究[J].石油化工高等学校学报,2025,38(2):10-20,11.基金项目
国家自然科学基金项目(U22B20144). （U22B20144）
