摘要
为了深入认识稠油火驱开发低温氧化阶段的原油与尾气变化特征,利用反应釜开展了不同温度条件下的低温氧化实验,进行了原油物性、族组分、官能团、色谱指纹、同位素以及尾气组分等方面的研究。研究表明:(1)稠油在火驱低温氧化阶段以加氧反应为主,并伴随少量的裂解反应;(2)稠油在200℃以下低温氧化阶段原油物性变差,在200℃时黏度、密度达到最大值,之后随着温度升高又逐渐降低,这主要受原油中非烃、沥青质以及氧元素含量影响;(3)由于裂解程度低,原油与族组分的碳同位素没有发生明显的同位素分馏现象;(4)尾气数据表明稠油火驱低温氧化过程中生成了醛、酮、醇或羧酸等含氧化合物。该研究探索了稠油火驱低温氧化过程中原油与尾气的变化规律,并计算出了不同温度下稠油低温氧化反应方程。
In order to better understand the variation characteristics of crude oil and tail gas during the low-temperature oxidation stage of heavy oil reservoir development via fire flooding,the low-temperature oxidation experiments under different temperature conditions were carried out in a reactor,and the physical properties,family components,functional groups,chromatographic fingerprints,isotopes,and tail gas components of crude oil were studied.The results show that:firstly,heavy oil is dominated by oxygenation reaction during the low-temperature oxidation process of fire flooding,accompanied with a small amount of cracking reaction.Secondly,the physical properties of crude oil deteriorates significantly in the low-temperature oxidation stage of heavy oil below 200℃,with the viscosity and density of crude oil reaching a maximum at 200℃,before gradually declining with the rise in temperature.This is mainly affected by the contents of non-hydrocarbon,asphaltene,and oxygen elements in crude oil.Thirdly,no obvious sign of isotope fractionation were seen in the carbon isotope of crude oil and group components due to the low degree of pyrolysis.Finally,tail gas data indicate that oxygen-containing compounds such as aldehydes,ketones,alcohols,or carboxylic acids are generated during the low-temperature oxidation process of fire flooding in heavy oil reservoir.The variation pattern of crude oil and tail gas in the low-temperature oxidation process of fire flooding in heavy oil reservoir was explored,based on which results the low-temperature oxidation reaction equations of heavy oil at different temperatures were formulated.
作者
闫红星
YAN Hong-xing(Research Institute of Oil Exploration and Development,Liaohe Oilfield of Petrochina,Panjin 124010,China)
出处
《科学技术与工程》
北大核心
2021年第13期5326-5332,共7页
Science Technology and Engineering
基金
国家科技重大专项(2016ZX05055)。
关键词
稠油
火驱
低温氧化
色谱指纹
燃烧状态
火驱尾气
heavy oil
in-situ combustion
low temperature oxidation
chromatographic fingerprint
combustion state
tail gas
作者简介
第一作者:闫红星(1987-),男,汉族,河北沧州人,硕士,工程师。研究方向:油气地球化学、油藏地球化学。E-mail:yanhongxing87@126.com。
