中国资源综合利用2024，Vol.42Issue(4)：41-43,3.DOI:10.3969/j.issn.1008-9500.2024.04.012
裂缝内CO2压裂液相态分布特征的数值模拟研究
Numerical Simulation Study on the Phase Distribution Characteristics of CO2 Fracturing Fluid inside Cracks
徐智颢 1杜博 1李东东1
作者信息
- 1. 陕西省煤层气开发利用有限公司,西安 710000
- 折叠
摘要
Abstract
The CO2 dry fracturing technology utilizes pure liquid CO2 for sand carrying fracturing construction,and transforms the reservoir,this technology has been widely applied on site.However,the phase distribution of CO2 fracturing fluid within fractures has not been systematically studied.The physical model of two-dimensional fractures is established by using fluid simulation software to analyze the phase distribution of CO2 fracturing fluid during the fracturing process.The research results indicate that during the fracturing process,CO2 fracturing fluid exists in two phases of liquid CO2 and supercritical CO2,and the distribution of supercritical CO2 is the main one;when CO2 fracturing fluid is filled with cracks,as the distance between the measuring point and the wellhead increases,the CO2 temperature first increases and then tends to stabilize;CO2 fracturing fluid enters the crack,and when the fracturing construction is completed for 20 min,the temperature of CO2 in the crack reaches the formation temperature;the lower the formation temperature,the slower the heat absorption of liquid CO2,the longer it takes to reach the supercritical phase,and the farther the distribution area of supercritical CO2 is from the fracture.关键词
裂缝/CO2 压裂液/相态/分布特征/数值模拟/液态CO2/超临界CO2/干法压裂Key words
cracks/CO2 fracturing fluid/phase/distribution characteristics/numerical simulation/liquid CO2/supercritical CO2/dry fracturing分类
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徐智颢,杜博,李东东..裂缝内CO2压裂液相态分布特征的数值模拟研究[J].中国资源综合利用,2024,42(4):41-43,3.
