压力对稠油拟组分氧化的影响
Effect of Pressure on Oxidation of Heavy Oil Pseudo-Component
陈莉娟 1李舒彤 2陈龙 1王田田 2潘竟军 1赵仁保3
作者信息
- 1. 中国石油新疆油田分公司,新疆 克拉玛依 834000
- 2. 中国石油大学(北京)油气资源与工程国家重点实验室,北京 102249
- 3. 中国石油大学(北京)油气资源与工程国家重点实验室,北京 102249;中国石油大学(北京)克拉玛依校区,新疆 克拉玛依 834000
- 折叠
摘要
为进一步明确稠油火驱过程中的反应动力学行为和产出原油组分变化规律,通过实沸点蒸馏法将新疆红浅 1 井区稠油划分为不同沸程的拟组分,研究了体系压力对沸程高于 350℃的稠油拟组分氧化行为的影响,并在线性升温条件下进行燃烧池实验,研究体系压力对稠油各拟组分与空气反应时的产气体积分数、温度和放热量的变化规律.结果表明:体系压力对低温氧化阶段的加氧反应和脱羧反应有显著影响,且对低沸程拟组分的影响更加明显;沸程为 350～420℃的拟组分在体系压力为 3.0 MPa时的CO+CO2 生成量是其在 1.0 MPa时的 10 倍;高沸程拟组分虽然受体系压力影响较小,但沸程大于 500℃的拟组分的放热量可高达 12.26 kJ/g;稠油火驱的改质效果取决于重质组分的消耗量和裂解反应.研究结果为火驱过程中稠油组分的缺失情况和油藏温度的合理分析及预测提供了借鉴.
Abstract
To further clarify the performance of reaction kinetic and the variety pattern of oil components in the process of in-situ combustion,the heavy oil of well Hongqian-1(Xinjiang)was divided into pseudo-components with different boiling ranges by the method of true boiling point(TBP).The effect of system pressure on the oxida-tion performance of pseudo-components with boiling range higher than 350℃was studied.The combustion pool was tested with linear temperature program to study the variety pattern of system pressure on the gas volume frac-tion,temperature and thermal intensity while the pseudo-components of heavy oil reacted with injected air.The re-sults show that the system pressure has significant effects on the oxygenation reaction and decarboxylation during the low-temperature oxidation stage,and the effect on the pseudo-components of low boiling range is further pro-nounced.The CO and CO2 production of the pseudo-components with a boiling range of 350℃to 420℃at a sys-tem pressure of 3.0 MPa is 10 times higher than its production at 1.0 MPa.Although the pseudo-components with high boiling range are less affected by the system pressure,the thermal intensity of the pseudo-components with a boiling range greater than 500℃can be as high as 12.26 kJ/g;the upgrading of heavy oil in the process of in-situ combustion depends on the consumption of heavy components and pyrolysis reactions.The research results provide reference for the analysis of components loss and reasonable analysis and prediction of reservoir temperature in the process of in-situ combustion.
关键词
火驱/稠油/燃烧池/低温氧化/拟组分/体系压力Key words
in-situ combustion/heavy oil/combustion pool/low temperature oxidation/pseudo-components/system pressure引用本文复制引用
基金项目
新疆维吾尔自治区高层次人才引进项目(JXDF0221)
中国石油新疆油田分公司横向项目(HX20170491)
出版年
2024
国家科技期刊平台
NSTL
万方数据