摘要
通过构造物理模拟实验,给出了在简单剪应力作用下的构造变形过程。在剪应力的作用下,应变圆变形为应变椭圆,应变椭圆的长轴夹角逐渐增加.主位移带方向与剪应力作用方向近于平行,形成与应力作用方向呈45°夹角的雁行式剪切断裂和追踪其形成的锯齿状剪切断裂,它们与主位移带共同构成剪切断裂体系,具有张-剪特征,为油气运聚提供了非常有利的通道和存储条件。
On the base of results of physical modeling, processes of structural deformation have been given under simple shear stresses. Strain circle deforms strain ellipsoid under shear stresses, in which the angle between strain major axis and horizontal axis has been increased by degrees. Major displacement zone parallels with direction of shear loading. An echelon shear fractures have angle of 45?with direction of shear loading. Following zigzag shear fracture has been deformed. An echelon shear fractures, zigzag shear fracture and major displacement zone made up the shear fracture system. Shear fracture system is characterized by tensile-shear, which provide a powerful pathway to migration and storage conditions of hydrocarbon.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2004年第6期56-57,共2页
Petroleum Exploration and Development
关键词
剪应力
剪切断裂
油气运聚
构造物理模拟
shear stresses
shear fractures
migration and accumulation of hydrocarbon
physical modeling
