Experiment on electric field-enhanced CO<sub>2</sub>-oil miscibility flooding in tight sandstone reservoirs

Zhang Wentong; Wang Ruorong; Huang Hai; Ning Zhengfu; Li Zheng; He Yanlong; Yang Bing; Zheng Yong

doi:10.7623/syxb202604010

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Experiment on electric field-enhanced CO₂-oil miscibility flooding in tight sandstone reservoirs

更新时间：2026-08-04

- Experiment on electric field-enhanced CO₂-oil miscibility flooding in tight sandstone reservoirs
- ACTA PETROLEI SINICA Vol. 47, Issue 4, Pages: 881-892(2026)
- 作者机构：
  
  1. 西安石油大学新能源学院,陕西,西安,710065
  2. 西安石油大学石油工程学院,陕西,西安,710065
  3. 油气资源与工程全国重点实验室, 中国石油大学(北京),北京,102249
  4. 成都理工大学油气藏地质及开发工程全国重点实验室,四川,成都,610500
- 作者简介：
- 基金信息：
- DOI：10.7623/syxb202604010
  CLC： TE357
- Online First：11 May 2026，
  
  Published：2026
- 稿件说明：
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张文通, 王若榕, 黄海, 宁正福, 李正, 何延龙, 杨兵, 郑永. 电场强化致密砂岩储层CO

Zhang Wentong, Wang Ruorong, Huang Hai, et al. Experiment on electric field-enhanced CO₂-oil miscibility flooding in tight sandstone reservoirs[J]. ACTA PETROLEI SINICA, 2026, 47(4): 881-892. DOI: 10.7623/syxb202604010.
张文通, 王若榕, 黄海, 宁正福, 李正, 何延龙, 杨兵, 郑永. 电场强化致密砂岩储层CO DOI： 10.7623/syxb202604010.

Zhang Wentong, Wang Ruorong, Huang Hai, et al. Experiment on electric field-enhanced CO₂-oil miscibility flooding in tight sandstone reservoirs[J]. ACTA PETROLEI SINICA, 2026, 47(4): 881-892. DOI: 10.7623/syxb202604010. DOI：

摘要

针对新能源背景下油田生产的绿电资源难以消纳及CO

驱矿场应用中油气难以混相的难题

经过室内实验发现电场可以强化储层CO

驱油气混相

提出面向矿场应用的"电场+CCUS"新模式。实验结果表明:电场可以有效提高致密砂岩储层CO

驱油效率

且存在最佳的电场强度

其中

以1 V/cm的电场强度作用效果最好

可促使驱油效率达到71.25%

相比未加电场作用下的驱油效率(55.34%)

增幅可达28.75%;通过对不同电场强度下的出口端原油开展气相色谱和傅里叶红外光谱分析发现

电场可以促使原油中的重质组分含量下降

中质组分含量上升;基于原油组分结果利用单烷烃形成复配模拟油

采用高温高压可视化反应釜开展油气混相实验发现

电场作用后的模拟油最小混相压力为21.6 MPa

相比电场施加前的模拟油最小混相压力(22.5 MPa)

最小混相压力下降了4%。研究表明

电场通过调控原油组分增强CO

—原油的混相能力

进而提高了CO

驱油效果

为"电场+CCUS"新模式在矿场规模化应用提供理论和技术支撑。

Abstract

This study aims to tackle the challenges of underutilized wind and solar-generated green electricity in oilfields under the context of renewable energy and the difficulty of achieving CO

-oil miscibility in field applications. Laboratory experiments reveal that electric fields can enhance oil-gas miscibility during CO

flooding. On this basis

a novel "Electric Field + CCUS" model for field applications is proposed. Experimental results demonstrate that electric

fields can significantly improve CO

flooding efficiency in tight sandstone reservoirs

with an optimal electric field strength identified. Specifically

an electric field strength of 1 V/cm yielded the best oil displacement efficiency of 71.25 %

representing a 28.75 % increase compared to the 55.34 % efficiency observed without the electric field. Gas chromatography and Fourier transform infrared spectroscopy analyses of crude oil at the outlet under varying electric field intensities indicate that the electric field contributes to a decrease in the content of heavy components and an increase in that of medium components. Based on the component analysis of crude oil

single alkanes were used to reconstitute simulated oil blends. High-temperature and high-pressure visual reactor experiments demonstrate that the minimum miscibility pressure (MMP) of the simulated oil treated with the electric field is 21.6 MPa

exhibiting a 4 % reduction compared to the MMP of 22.5 MPa before application of the electric field. The study shows that electric fields can enhance CO

-oil miscibility by modulating crude oil components

thereby improving CO

flooding efficiency. This provides both theoretical and technical support for the large-scale application of the "Electric Field+CCUS" model in oilfields.

关键词

Keywords

references

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AI问答

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Experiment on electric field-enhanced CO2-oil miscibility flooding in tight sandstone reservoirs

DOI：10.7623/syxb202604010

摘要

Abstract

关键词

Keywords

references

Experiment on electric field-enhanced CO₂-oil miscibility flooding in tight sandstone reservoirs