基于岩心分析的稠油火驱过程中组分转化路径  

Component Transformation Path in the Process of Heavy Oil Fire Flooding Based on Core Analysis

作　　者：孙新革[1] 杨凤祥[1] 李海波[1] 展宏洋 高成国[1] 袁士宝[2] Sun Xin′ge;Yang Fengxiang;Li Haibo;Zhan Hongyang;Gao Chengguo;Yuan Shibao(PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;College of Petroleum Engineering,Xi′an Shiyou University,Xi′an,Shaanxi 710065,China)

机构地区：[1]中国石油新疆油田分公司,新疆克拉玛依834000 [2]西安石油大学石油工程学院,陕西西安710065

出　　处：《特种油气藏》2024年第3期85-90,共6页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“基于热-流-固-化多场耦合的火驱储层热次生孔道演化及盐沉析调控机理研究”(52274039);中国石油重大开发试验项目“新疆红山嘴油田红浅1井区火驱工业化试验”(2023YQX10411ZK)。

摘　　要：针对火驱现场原油组分转化不明确的问题,以新疆油田红浅1井区稠油油藏为例,运用红外光谱和GC-MS方法,结合岩心分析结果与稠油反应机理,认为稠油组分反应变化分为烃类分子氧化、稠油组分化学键断裂和芳环自由基缩合生焦变化。将研究成果应用于稠油组分转化路径的分析,结果表明:低温阶段,稠油组分反应最集中,以缩聚和热裂解反应为主;燃烧阶段,芳环自由基聚合生焦,C-H键断裂加氧形成OH、CHO、CO等官能团;高温氧化阶段,为焦炭和重质组分(胶质、沥青质)的燃烧。研究内容验证了火驱过程中焦炭燃烧使稠油升温降黏、稠油组分转化为焦炭启动燃烧的结论,加深认识火驱过程中燃料形成和转化的意义。To address the issues of unclear conversion of oil components in in-situ combustion process,the heavy oil reservoir in Hongqian-1 well field of Xinjiang Oilfield was taken as an example:by using infrared spectroscopy and GC-MS method,combined with core analysis results and heavy oil reaction mechanism,the reaction variation of heavy oil components are divided into hydrocarbon oxidation,chemical bond cleavage of heavy oil components and coking formed by aryl radical condensation.The research results are applied to the analysis of the conversion path of heavy oil components.The findings show that the reaction of heavy oil components is the most concentrated in the low temperature stage,which is dominated by condensation and thermal cracking reactions;in the combustion stage,the aryl radical condensation produces coke,and the C-H bond is broken and oxygenated to form oxides such as OH,CHO,and CO;at the high temperature oxidation stage,the coke and heavy components of gum and asphaltene combust.The findings of this study confirm the conclusion that coke combustion induces a rise in temperature and a decrease in viscosity of heavy oil,leading to the transformation of heavy oil components into coke during the fire drive process,thereby enhancing our understanding of the significance of fuel formation and transformation during fire flooding.

关 键 词：火驱 稠油 氧化反应 热反应 转化路径 岩心分析 

分 类 号：TE345[石油与天然气工程—油气田开发工程]