高温、高压条件下的页岩气吸附规律研究

Research on Shale Gas Adsorption Law Under High Temperature and High Pressure

为了研究高温、高压条件下的页岩气吸附规律,设计了页岩气吸附装置。取四川某油田的岩样与甲烷气体进行吸附实验研究。实验结果表明,在相同压力条件下,温度越高,页岩对甲烷气体的吸附量越小。当温度较高时,页岩对甲烷的吸附量随着温度的升高而缓慢减小;当温度恒定且压力小于5 MPa时,页岩对甲烷气体的吸附量随着压力增加而逐渐增大。当压力较大时,页岩对甲烷气体的吸附量增幅变缓;页岩颗粒的目数对页岩吸附的影响不显著。利用Langmuir方程对此吸附规律进行拟合,拟合结果较好。

To study the shale gas adsorption law under the condition of high temperature and high pressure,adsorption device is designed for the shale gas.The adsorption experiments of rock samples and methane gas from a basin in Sichuan are carried out with this device,in different temperature and under the condition of different pressure.The experimental results show that under the condition of the same pressure,the higher the temperature,shale on methane gas adsorption quantity decreases.When the temperature is high,with the increase of temperature,shale of methane adsorption quantity reduces gradually.When a constant temperature and pressure is less than 5 MPa,with the increase of pressure,shale of methane gas adsorption capacity increases gradually.When pressure is high,shale gas adsorption of methane increases at a slow speed;the effect of shale particle mesh on the absorption of shale is not significant.The adsorption law is fitted with Langmuir equation,and fitting results are good.