水作用下页岩物理力学性质实验研究进展

水作用下页岩的物理力学性质对页岩储层压裂增渗改造及井壁稳定性具有重要的影响。本文旨在通过对水作用下页岩物理力学性质实验研究进展的梳理，归纳出目前该类研究得出的发现和观点，并在此基础上进行讨论与展望。主要从如下几个方面进行总结与阐述：（1）水的作用对页岩黏土矿物成分及微观结构的影响；（2）水的作用对页岩的声学性质的影响，包括对页岩的声波波速、衰减特征、时域及频域信号特征的影响；（3）水的作用对页岩宏观力学特性的影响，包括页岩的变形特征、强度特征及破裂特征。基于对上述各方面研究现状的总结，结合页岩气开采的工程实际问题，针对研究现状及未来的研究方向进行讨论。本文将不仅在页岩储层压裂改造设计及井壁稳定研究中有助于我们系统了解水对页岩物理力学性质的影响，也将为在该方面开展进一步研究提供有益的借鉴。

EXPERIMENTAL STUDIES ON PHYSICAL AND MECHANICAL PROPERTIES OF SHALE AFFECTED BY WATER: A REVIEW

The effects of water on the physical and mechanical properties of shale are of great importance for understanding the hydraulic fracturing treatment and borehole stability in the shale reservoir. This paper aims at giving a systematic review on the experimental studies on this area, including the following aspects:(1)effect of water on the clay mineral contents and micro-structure of shale; (2)effect of water on the acoustic characteristics of shale; and (3)effect of water on the mechanical properties of shale, such as the deformation, strength, and failure behaviors. Based on the state of art of these studies, a discussion is made combining with the engineering problems. This paper will be helpful for understanding the related issues in shale gas exploitation and carrying out deeper researches.