[1]王伟伟.沈625区块高凝油减氧空气驱实验研究与应用[J].复杂油气藏,2019,12(03):68-71.[doi:10.16181/j.cnki.fzyqc.2019.03.014]
　WANG Weiwei.Experimental research of oxygen-reducing air flooding for highpour-point oil in Shen 625 block and its application[J].Complex Hydrocarbon Reservoirs,2019,12(03):68-71.[doi:10.16181/j.cnki.fzyqc.2019.03.014]
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沈625区块高凝油减氧空气驱实验研究与应用()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
12卷
期数:
2019年03期
页码:
68-71
栏目:
油气工程
出版日期:
2019-09-25

文章信息/Info

Title:
Experimental research of oxygen-reducing air flooding for highpour-point oil in Shen 625 block and its application
作者:
王伟伟
中国石油辽河油田分公司,国家能源稠(重)油开采研发中心,辽宁 盘锦 124010
Author(s):
WANG Weiwei
PetroChina Liaohe Oilfield Company, National Energy Heavy Oil R&D Center, Panjin 124010,China
关键词:
沈625区块 高凝油 减氧空气驱 O2浓度 低温氧化 驱油效率
Keywords:
Shen 625 block;  high pour point oil;  deoxygenated air flooding;  O2 concentration;  low temperature oxidation;  oil displacement efficiency
分类号:
TE341
DOI:
10.16181/j.cnki.fzyqc.2019.03.014
文献标志码:
A
摘要:
针对目前辽河油田沈625区块潜山油藏在注水开发方式下,回采效果差及采收率低等问题,开展了不同浓度减氧空气驱的室内实验研究。不同O2浓度ARC实验结果表明,随O2浓度降低,原油累积热量时间变长且氧化反应剧烈程度有所下降,但监测到的反应温度不变,放热温度为165℃,氧化反应加剧时温度为195℃。说明沈625块油藏温度低于165℃时放热量很少,不能产生有效热效应,适合采用减氧空气驱。不同O2浓度静态氧化与动态驱替实验表明,随O2浓度增加,原油的氧化程度有所增加,但产出的尾气中剩余O2含量较高; 驱油效率贡献率有所增加,但驱油效率变化很小,说明O2浓度对低温氧化影响较小。结合室内实验结果及氧含量的安全标准,采用氧含量为5%的减氧空气驱替原油,可以有效提高产油量,控制综合含水,既可以降低安全风险,又能够提高油藏采收率。
Abstract:
Aiming at the problems of poor effect of bad production and low oil recovery rate of buried hill reservoir in Shen 625 block of Liaohe Oilfield under water injection development mode, laboratory experiments were carried out on oxygen-reducing air flooding with different concentration. The results of ARC experiments with different O2 concentration show that with the decrease of O2 concentration, the cumulative heat time of crude oil increases and the degree of oxidation reaction decreases, but the monitored reaction temperature remains unchanged, the exothermic temperature is 165 ℃, and the temperature is 195 ℃ when the oxidation reaction intensifies. The results indicate that the heat release of Shen 625 reservoir is very little when the temperature is lower than 165 ℃, which can not produce effective thermal effect, so it is suitable to use oxygen-reducing air flooding. Static oxidation and dynamic displacement experiments with different O2 concentration show that the oxidation degree of crude oil increases with the increase of O2 concentration, but the residual O2 content in the tail gas is higher; the contribution rate of oil displacement efficiency increases, but the change of oil displacement efficiency is small, indicating that O2 concentration has little effect on low temperature oxidation. Combining with laboratory test results and safety standards of oxygen content, using oxygen-reducing air with oxygen content of 5% to displace crude oil can effectively increase oil production and control comprehensive water cut, which can not only reduce safety risk, but also improve reservoir recovery.

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备注/Memo

备注/Memo:
收稿日期:2019-05-14; 改回日期:2019-06-11。
作者简介:王伟伟(1982—),女,工程师,现从事油田稠油开发室内实验研究工作。E-mail:wwwsun10@sina.com。
更新日期/Last Update: 2024-01-18