轻质油藏注空气低温氧化模式及热动力学研究

doi:10.3969/j.issn.1006-6535.2025.06.011

特种油气藏 ›› 2025, Vol. 32 ›› Issue (6): 92-99.DOI: 10.3969/j.issn.1006-6535.2025.06.011

轻质油藏注空气低温氧化模式及热动力学研究

刘鹏刚

中国石化西南油气分公司采气二厂,四川阆中 637400

收稿日期:2024-08-10 修回日期:2025-09-10 出版日期:2025-12-25 发布日期:2025-12-31
作者简介:刘鹏刚(1990—),男,工程师,2012年毕业于西南石油大学石油工程专业,2018年毕业于该校油气田开发工程专业,获硕士学位,现从事油气田开发方面的研究及管理工作。
基金资助:
国家自然科学基金青年基金“原油氧化机理、反应动力学及氧化增能改善储层结构研究”(52204049)

Low-temperature oxidation patterns and thermodynamics in light oil reservoirs under air injection

LIU Penggang

The Second Gas Production Plant of Sinopec Southwest Oil and Gas Company,Langzhong,Sichuan 637400,China

Received:2024-08-10 Revised:2025-09-10 Online:2025-12-25 Published:2025-12-31

摘要/Abstract

摘要： 针对轻质油藏高压注空气开发过程中低温氧化模式不明确、常规空气驱安全风险高的问题,以新疆X油藏为例,采用静态等温氧化管实验和非等温热重测试(TG/DTG-DTA)手段,结合色谱测试、红外光谱分析、物性测量以及经典的Arrhenius动力学模型,从微观角度分析氧化过程中原油碳烃分子结构的变化及氧化特征。结果表明:原油主要体现的低温氧化模式为加氧反应、缩聚反应和碳键剥离反应;增大氧含量和储层岩石的非均相催化作用可以使低温氧化更易进行,加深氧化程度,形成更多后续燃料沉积所需的基质;原油在氧含量为13%的减氧空气中仍具有较高的氧化活性和较强的燃料基质生成能力,同时储层岩石中存在黏土矿物和活性金属元素,这为新疆X油藏成功实施减氧空气驱展现出极大的潜力。研究成果对于储层中黏土矿物含量较高的轻质油藏实施减氧空气驱具有一定的指导意义和理论支撑。

关键词: 轻质油藏, 高压注空气, 低温氧化, 氧化模式, 敏感性分析, 热动力学

Abstract: Addressing the unclear patterns of low-temperature oxidation(LTO)and high safety risks of conventional air flooding in light oil reservoirs during high-pressure air injection,this study took the Xinjiang X reservoir as an example.Using static isothermal oxidation tube experiments and non-isothermal thermogravimetric analysis(TG/DTG-DTA),combined with chromatography,infrared spectroscopy,physical property measurements,and the classical Arrhenius kinetic model,analysis was done from a microscopic perspective about the changes in crude oil hydrocarbon molecular structure and oxidation characteristics during oxidation.Results showed that the main LTO reactions of the crude oil were oxygen-addition,polycondensation,and C-C bond scission.Increasing oxygen concentration and the heterogeneous catalytic effect of reservoir rock facilitated LTO,deepening oxidation and generating more fuel-grade residue precursors.Crude oil in 13% O₂ depleted air still exhibited high oxidation reactivity and strong fuel-residue generation capacity,and the presence of clay minerals and active metal elements in the reservoir rock indicated great potential for implementing oxygen-depleted air injection in the Xinjiang X reservoir.This study provides positive guidance and theoretical support for implementing oxygen-depleted air flooding in high-clay-content light oil reservoirs.

Key words: light oil reservoir, high-pressure air injection, low-temperature oxidation, oxidation pattern, sensitivity analysis, thermodynamics

中图分类号:

TE341

刘鹏刚. 轻质油藏注空气低温氧化模式及热动力学研究[J]. 特种油气藏, 2025, 32(6): 92-99.

LIU Penggang. Low-temperature oxidation patterns and thermodynamics in light oil reservoirs under air injection[J]. Special Oil & Gas Reservoirs, 2025, 32(6): 92-99.

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轻质油藏注空气低温氧化模式及热动力学研究

Low-temperature oxidation patterns and thermodynamics in light oil reservoirs under air injection

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