【摘要】 本文介绍了在华东石油学院钻井岩石力学实验室建立的岩石三轴蠕变试验装置以及部分大庆泥岩岩芯的蠕变试验结果,证明大庆泥岩蠕变服从非线性模式。试验研究表明,围压的减少(即地下应力差增大)将加速泥岩的蠕变,含水量对泥岩的蠕变特性影响特别大,水浸泥岩层将大大加快其蠕变速度。本文提出的由试验所建立的蠕变经验模式及本构方程,为定量分析在地应力作用下,套管的岩压外载依赖于时间的变化情况提供了科学的依据。更多还原

【Abstract】 A rock creep test system is described and some creep test results of Daqing mudstones are presented. The results show that the creep type of the muds tones is non-linear. An increase in the water content will greatly speed up the steady creep rate. An empirical creep model, i.e. modified Burger’s model is proposed. The constitutive equation derived from this model is useful for the calculation of the formation load on well casings.30更多还原