In this paper, the authors have studied the changes in the mechanical properties of shale caused by temperature and pressure changes in the process of shale gas development. The mechanical properties of shale are evaluated by the rock triaxial test method in the temperature range from 25°C to 120°C. Then, we have analyzed the influence of the temperature and pressure parameters on the stress-strain curves, peak stress, and elastic modulus characteristics of shale. The results show that the mechanical properties of shale change with change in temperature and confining pressure. With increase in temperature, the peak stress and the elastic modulus characteristics gradually decrease. With increase in the confining pressure, the peak stress increases significantly, and the elastic modulus also tends to increase. The research results have an important theoretical and practical significance for shale gas development.

在本文中，作者研究了页岩气开发过程中温度和压力变化引起的页岩力学性质变化。页岩的力学性能采用岩石三轴试验法在25℃～120℃的温度范围内进行评价。然后，我们分析了温度和压力参数对页岩应力-应变曲线、峰值应力和弹性模量特征的影响。结果表明，页岩力学性质随温度和围压的变化而变化。随着温度的升高，峰值应力和弹性模量特性逐渐降低。随着围压的增加，峰值应力显着增加，弹性模量也有增加的趋势。