| 孙可明*,任硕,张树翠,陈治宇,吴迪,岳立新,李赞.超临界CO2在低渗透煤层中渗流规律的实验研究[J].实验力学,2013,28(1):117~120 |
| 超临界CO2在低渗透煤层中渗流规律的实验研究 |
| Experimental Study of Supercritical Carbon Dioxide Seepage Flow in Low Permeability Coal Seam |
| 投稿时间：2012-03-31 修订日期：2012-10-02 |
| DOI：10.7520/1001-4888-12-048 |
| 中文关键词: 超临界CO2 低渗透煤层 渗流 |
| 英文关键词:supercritical carbon dioxide low permeability coal seam seepage flow |
| 基金项目:国家自然科学基金(11072103、50874057)资助 |
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| 中文摘要: |
| 利用自主研发的THM三场耦合渗流实验系统,进行不同孔隙压力和温度条件下的超临界CO2在低渗透煤层中的渗流实验,得出不同温度下流速和压力梯度之间的关系,从而得到了低渗透煤层注入超临界CO2的非达西渗流规律,即流速与压力梯度变化规律呈现正指数关系。随着压力梯度的增大,渗透系数也不断的增大,且呈现正指数关系；在同一体积应力和压力梯度的条件下,温度越高,流速越快；温度在临界点附近,流速和渗透系数增加很快。 |
| 英文摘要: |
| A series of seepage experiments of supercritical CO2 were carried out under different conditions of pore pressure and temperature based on a self-developed THM three field coupled seepage experiment system. Relationship among the flow velocity and the pressure gradient at different temperatures were obtained. That is non-Darcy seepage regulation of supercritical CO2 in low permeability seam, which means a positive exponential relation between the flow velocity and pressure gradient. The permeability coefficient increases along with the pressure gradient increase, and presents a positive exponential relationship; under the same volume stress and pressure gradient conditions, the higher the temperature is, the faster the flow velocity; when temperature approaches the critical point, the flow velocity and the permeability coefficient increase faster. |
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