In-situ combustion within steam-injected heavy oil reservoirs: Combustion characteristics and produced oil properties

IF 3.5 2区化学 Q2 CHEMISTRY, ANALYTICAL

Thermochimica Acta Pub Date : 2025-11-01 Epub Date: 2025-08-22 DOI:10.1016/j.tca.2025.180111

Shuai Zhao , Chunyun Xu , Wanfen Pu , Haolong He , Chengdong Yuan , Mikhail A. Varfolomeev

{"title":"In-situ combustion within steam-injected heavy oil reservoirs: Combustion characteristics and produced oil properties","authors":"Shuai Zhao , Chunyun Xu , Wanfen Pu , Haolong He , Chengdong Yuan , Mikhail A. Varfolomeev","doi":"10.1016/j.tca.2025.180111","DOIUrl":null,"url":null,"abstract":"<div><div>A lack of research existed on the in-situ combustion (ISC) characteristics and produced oil properties in steam-injected heavy oil reservoirs. This study focused on investigating combustion characteristics in steam-developed (steam huff-and-puff and steam flooding) heavy oil reservoirs by the combustion tube (CT) and experimental schemes, followed by a thorough characterization of the produced oils. The results indicated that as the secondary water body (SWB) was situated in the initial segment of CT, the combustion front propagated through the SWB region with oxygen concentration below 2 % and CO<sub>2</sub> concentration of 11 %-13 %. In contrast, when SWB was positioned in the second half of CT, the peak temperatures at thermocouples 5 and 6 dipped below 300°C, failing to achieve the stable propagation of combustion front. The location of SWB significantly influenced combustion front propagation. Notably, three key indicators were found to assess the ISC effectiveness.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"753 ","pages":"Article 180111"},"PeriodicalIF":3.5000,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermochimica Acta","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040603125001868","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/22 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}

引用次数: 0

Abstract

A lack of research existed on the in-situ combustion (ISC) characteristics and produced oil properties in steam-injected heavy oil reservoirs. This study focused on investigating combustion characteristics in steam-developed (steam huff-and-puff and steam flooding) heavy oil reservoirs by the combustion tube (CT) and experimental schemes, followed by a thorough characterization of the produced oils. The results indicated that as the secondary water body (SWB) was situated in the initial segment of CT, the combustion front propagated through the SWB region with oxygen concentration below 2 % and CO₂ concentration of 11 %-13 %. In contrast, when SWB was positioned in the second half of CT, the peak temperatures at thermocouples 5 and 6 dipped below 300°C, failing to achieve the stable propagation of combustion front. The location of SWB significantly influenced combustion front propagation. Notably, three key indicators were found to assess the ISC effectiveness.

查看原文本刊更多论文

注蒸汽稠油油藏的原位燃烧：燃烧特性和采出油性质

对于注蒸汽稠油油藏的原位燃烧特性和采出油性质的研究还比较缺乏。本研究的重点是通过燃烧管（CT）和实验方案研究蒸汽开发（蒸汽吞吐和蒸汽驱）稠油油藏的燃烧特性，然后对采出油进行全面表征。结果表明：由于二次水体（SWB）位于CT初始段，燃烧锋面在氧浓度低于2%、CO2浓度为11% ~ 13%的情况下通过SWB区域传播；相比之下，当SWB位于CT的后半段时，热电偶5和6的峰值温度降至300℃以下，无法实现燃烧锋的稳定传播。SWB的位置对燃烧锋的传播有显著影响。值得注意的是，我们发现了评估ISC有效性的三个关键指标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Thermochimica Acta 化学-分析化学

CiteScore

6.50

自引率

8.60%

发文量

210

审稿时长

40 days

期刊介绍： Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes