储层在高温条件下的应力敏感性研究

Stress Sensitivity of Reservoir under High Temperature

在高温(150℃)条件下对莺琼盆地某砂岩储层岩样进行液测渗透率变围压实验,通过分析不同围压下的渗透率与围压的实验数据,确定了该地区岩样在高温条件下的液测渗透率与有效围压的关系为多项式关系,并得到了岩样的渗透率损害率及渗透率相对损害率.运用岩石的变形理论,很好地解释了高温条件下岩样的液测渗透率随有效围压的增加而降低的现象和渗透率滞后现象,为该地区储层岩石在高温条件下的应力敏感性的研究和应用提供了实验依据.

This variable confining pressure experiment about liquid measuring permeability was made under the conditions of high temperature （ 150 ℃ ） with sandstone reservoir samples of Ying -qiong basin. Through the analysis of the experimental data of confining pressure and the permeability under different confining pressure, the relationship between the liquid measuring per- meability and the effective confining pressure about the area samples under high temperature conditions are identified as polynomi- al relationship. The permeability damage rate and permeability relative damage rate of samples are also obtained. By using rock deformation theory, the phenomenon that under the condition of high temperature liquid measuring permeability of rock samples decrease and permeability lag with the effective confining pressure increasing are explained very well. And this experiment provide experimental basis for the research and application of stress sensitivity in this region under high temperature conditions.