摘要
通过对含裂缝致密砂岩的力学变形和渗透能力实验,分析了不同类型裂缝的变形规律和渗透率的变化特征,揭示了裂缝变形特性与裂缝类型及裂缝表面结构有关,而裂缝类型及其变形方式是控制裂缝渗流能力的关键因素。依据实验结果可以预测各类型裂缝在不同应力变化路径下的力学宽度变化以及等效水力学宽度变化,并可建立二者间的实验关系。同时,结合实际储层应力条件对不同类型裂缝的有效性进行了分析评价。
The paper analyses the deformation law and the change characteristics of permeability for different types of fractures by experimenting on the mechanical deformation and permeability in tight sandstone with fractures. The results show that the deformation characteristics of fractures are related to the type and surface configuration of fractures, and the types and deformation way of fractures are the key factors controlling their permeable abilities. Variation of mechanical and hydromechanical apertures for different types of fractures in different stress paths can be predicted on the basis of the results of experiments, and the experimental relationship between the mechanical and hydromechanical apertures can also be established. Also, the paper analyses and evaluates the effectiveness of different types of fractures combined with the actual stress conditions of a reservoir.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第4期457-462,共6页
Journal of Chengdu University of Technology: Science & Technology Edition
关键词
致密砂岩
裂缝
渗透率
变形
应力
tight sandstone
fracture
permeability
deformation
stress
