孔隙介质中超临界CO2泡沫稳态传输机制及数值模拟方法

doi:10.7623/syxb202407007

石油学报 ›› 2024, Vol. 45 ›› Issue (7): 1122-1129.DOI: 10.7623/syxb202407007

• 油田开发 • 上一篇

孔隙介质中超临界CO₂泡沫稳态传输机制及数值模拟方法

魏兵¹, 杨孟珂¹, 赵金洲¹, Kadet Valeriy², 蒲万芬¹

1. 西南石油大学油气藏地质及开发工程全国重点实验室四川成都 610500;
2. 古勃金国立石油与天然气大学俄罗斯莫斯科 119991

收稿日期:2023-11-07 修回日期:2024-05-02 发布日期:2024-08-06
通讯作者: 魏兵,男,1983年8月生,2013年获加拿大新布伦瑞克大学博士学位,现为西南石油大学教授、博士生导师,主要从事复杂油气藏提高采收率理论和技术研究。Email:bwei@swpu.edu.cn
作者简介:魏兵,男,1983年8月生,2013年获加拿大新布伦瑞克大学博士学位,现为西南石油大学教授、博士生导师,主要从事复杂油气藏提高采收率理论和技术研究。Email:bwei@swpu.edu.cn
基金资助:
国家重点研发计划项目(2023YFE0120700)、国家自然科学基金项目(No.52274041)、四川省杰出青年科学基金项目(2023NSFSC1954)和高等学校学科创新引智计划项目(D18016)资助。

Steady-state flow regimes and numerical simulation method of supercritical CO₂ foam in porous media

Wei Bing¹, Yang Mengke¹, Zhao Jinzhou¹, Kadet Valeriy², Pu Wanfen¹

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. Gubkin Russian State University of Oil and Gas, Moscow 119991, Russia

Received:2023-11-07 Revised:2024-05-02 Published:2024-08-06

摘要/Abstract

摘要： CO₂泡沫是降低气相流度,扩大气体波及体积和提高CO₂封存效率的现实手段,其孔隙介质中的稳态传输行为对表征泡沫流变特征和流度控制能力至关重要。针对超临界CO₂泡沫稳态传输机制不清的问题,建立了模拟超临界CO₂泡沫长期稳态流动的实验装置及方法,系统研究了气液表观流速、泡沫质量对其传输行为的影响规律,绘制了稳态压力梯度等值线图版,创建了表征低干度区域上翘行为的液膜拖拽力函数模型,建立了描述孔隙介质中超临界CO₂泡沫稳态传输机制的数值模拟方法。研究结果表明:①在渗透率为302 mD的孔隙介质中,超临界CO₂泡沫稳态传输产生的压力梯度在0.620~1.872 MPa/m;②超临界CO₂泡沫的稳态传输不符合传统的高、低干度机制,低干度区域压力梯度等值线上翘,即随着液相流速增大,压力梯度逐渐降低;③在传统隐性泡沫结构模型的基础上,引入液膜拖拽力函数模型,可以准确描述超临界CO₂泡沫的稳态传输机制,特别是低干度区域的上翘行为;④在高、低干度区域,超临界CO₂泡沫均表现出剪切变稠的流变特征。

关键词: CO₂驱油和封存, 流动控制, 超临界CO₂泡沫, 稳态传输机制, 数值模拟方法

Abstract: CO₂ foam is a practical means to reduce the mobility of gas phase, and improve the sweep efficiency of oil reservoir and CO₂ storage efficiency, whose steady-state flow behaviors in porous media are critical to characterize the rheological characteristics and mobility control ability of foam. In response to the unclear steady-state flow regimes of supercritical CO₂ foam in porous media, the authors established an experimental device and method for simulating the long-term steady-state flow of supercritical CO₂ foam, systematically investigated the influences of superficial velocities of gas and liquid, foam quality on the steady-state flow behaviors, drawn the contour map of steady-state pressure gradient, built the drag force function model of liquid film for characterizing the upwarp behavior in low quality regime, and also developed a numerical simulation method for describing the steady-state flow regimes of supercritical CO₂ foam in porous media. The results indicate that:(1)The pressure gradient generated by the steady-state transport of supercritical CO₂ foam in porous media with a permeability of 302 mD ranges from 0.620 MPa/m to 1.872 MPa/m. (2)The steady-state flow of supercritical CO₂ foam in porous media does not conform to the traditional high and low quality regimes, and the pressure gradient contour line in the low quality area tilts upwards, i.e., as the liquid phase flow velocity increases, the pressure gradient gradually decreases. (3)On the basis of the traditional implicit-texture foam model (IT model for short), the liquid film drag force function model can accurately describe the steady-state flow regime of supercritical CO₂ foam, especially the upwarp behavior in low quality regions. (4)In the high and low quality regions, the supercritical CO₂ foam shows the shear thickening rheological characteristics.

Key words: CO₂ oil displacement and storage, flow control, supercritical CO₂ foam, steady-state flow regime, numerical simulation methods

中图分类号:

TE311

魏兵, 杨孟珂, 赵金洲, Kadet Valeriy, 蒲万芬. 孔隙介质中超临界CO₂泡沫稳态传输机制及数值模拟方法[J]. 石油学报, 2024, 45(7): 1122-1129.

Wei Bing, Yang Mengke, Zhao Jinzhou, Kadet Valeriy, Pu Wanfen. Steady-state flow regimes and numerical simulation method of supercritical CO₂ foam in porous media[J]. Acta Petrolei Sinica, 2024, 45(7): 1122-1129.

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孔隙介质中超临界CO₂泡沫稳态传输机制及数值模拟方法

Steady-state flow regimes and numerical simulation method of supercritical CO₂ foam in porous media

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