| 吴迪,王挺,刘雪莹,孙可明,辛利伟,梁冰*.页岩渗透特性受热力条件影响的实验研究[J].实验力学,2020,35(3):539~546 |
| 页岩渗透特性受热力条件影响的实验研究 |
| Experimental study on the influence of thermal conditions on shale permeability characteristics |
| 投稿时间：2018-10-18 修订日期：2019-04-10 |
| DOI：10.7520/1001-4888-18-230 |
| 中文关键词: 页岩 渗透率 孔隙压力 体积应力 温度 |
| 英文关键词:shale shale permeability pore pressure volume stress temperature |
| 基金项目:国家科技重大专项(编号：2017ZX05037-001)；国家自然科学基金项目(编号：51504122)；辽宁省教育厅项目(编号：LJYL047) |
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| 中文摘要: |
| 利用自行研制的三轴渗流实验装置，开展了考虑孔隙压力、体积应力和温度影响的页岩中CH4气体渗流规律研究。研究表明：(1)孔隙压力施加路径是影响CH4渗透率的主要因素，孔隙压力由2MPa升高到8MPa，页岩渗透率随孔隙压力的升高而降低，降低幅度达到63.5%，后期降低速度逐渐变慢；孔隙压力由8MPa降低到2MPa，页岩渗透率随孔隙压力的升高而升高，升高速度逐渐加快。(2)渗透率随体积应力的升高逐渐降低，体积应力由9MPa增加到27MPa，页岩渗透率降低了58.5%，降低速度逐渐变慢。(3)相同孔隙压力和体积应力下，渗透率随温度的升高而逐渐降低，温度由20℃增加到50℃，页岩渗透率降低幅度达到62.1%，降低速度逐渐变慢，最后达到临界值。 |
| 英文摘要: |
| The permeability characteristics of CH4 gas in shale considering the effects of pore pressure, volume stress and temperature is studied based on the self-developed triaxial permeability test device. The results indicate that: (1) The pore pressure application path is the main factor affecting the shale permeability. As the pore pressure increases from 2MPa to 8MPa, the shale permeability decreases by 66.0%, and the decrease rate becomes slow at the late stages. As the pore pressure reduces from 8MPa to 2MPa, the shale permeability increases with an accelerating increasing speed. (2) The permeability decreases with the increase of volume stress. As the volume stress increases from 9MPa to 27MPa, the permeability of shale decreases by 58.5% and the decreasing speed becomes slow gradually. (3) Under the same pore pressure and volume stress, the permeability decreases with the increase of temperature. As the temperature increases from 20℃ to 50℃, the permeability of shale decreases by 62.1%, and the decreasing speed gradually becomes slow, which finally reaches the critical value. |
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