压力对稠油拟组分氧化的影响

陈莉娟; 李舒彤; 陈龙; 王田田; 潘竟军; 赵仁保

doi:10.3969/j.issn.1006-6535.2024.03.017

特种油气藏 >

2024 , Vol. 31 >Issue 3: 129 - 135

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.03.017

油藏工程

压力对稠油拟组分氧化的影响

陈莉娟 ,
李舒彤 ,
陈龙 ,
王田田 ,
潘竟军 ,
赵仁保

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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)克拉玛依校区,新疆克拉玛依 834000

陈莉娟(1980—),女,高级工程师,2003年毕业于江汉石油学院石油工程专业,现从事稠油开发理论与工程研究工作。

赵仁保(1971—),男,教授,1994年毕业于河南大学化学化工专业,2006年毕业于中国石油大学(北京)油气田开发专业,获博士学位,现从事稠油火驱理论及提高采收率研究工作。

收稿日期: 2023-02-20

修回日期: 2024-03-31

网络出版日期: 2024-07-26

基金资助

新疆维吾尔自治区高层次人才引进项目“基于垂向火驱井网条件下超稠油的原位改质辅助开发机理研究”(JXDF0221);中国石油新疆油田分公司横向项目“火驱过程中原油组分及放热量的变化规律研究”(HX20170491)

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Effect of Pressure on Oxidation of Heavy Oil Pseudo-Component

Chen Lijuan ,
Li Shutong ,
Chen Long ,
Wang Tiantian ,
Pan Jingjun ,
Zhao Renbao

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1. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
2. National Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing 102249, China;
3. China University of Petroleum-Beijing at Karamay, Karamay, Xinjiang 834000, China

Received date: 2023-02-20

Revised date: 2024-03-31

Online published: 2024-07-26

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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。

关键词： 火驱; 稠油; 燃烧池; 低温氧化; 拟组分; 体系压力

本文引用格式

陈莉娟 , 李舒彤 , 陈龙 , 王田田 , 潘竟军 , 赵仁保 . 压力对稠油拟组分氧化的影响[J]. 特种油气藏, 2024 , 31(3) : 129 -135 . DOI: 10.3969/j.issn.1006-6535.2024.03.017

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 oxidation 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 fraction, temperature and thermal intensity while the pseudo-components of heavy oil reacted with injected air.The results 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 pronounced.The CO and CO₂ production of the pseudo-components with a boiling range of 350 ℃ to 420 ℃ at a system 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.

Key words： in-situ combustion; heavy oil; combustion pool; low temperature oxidation; pseudo-components; system pressure

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