摘要
在裂缝的定量研究中,通常需要选用一定的破裂准则来确定岩石在应力作用下裂缝形成时间以及裂缝的方向。构造裂缝往往不是以单一的形态出现,有张裂缝,也有共轭剪裂缝,甚至还有介于二者之间的张剪缝,因此,实际研究中要综合运用张裂缝准则和剪裂缝准则。在莫尔-库仑与格里菲思破裂准则的基础上,结合岩石力学实验,建立了适于低渗透砂岩储集层的岩石破裂判断准则,张裂缝准则选用格林菲斯准则,剪裂缝准则选用莫尔-库仑准则。
In the quantitative research on fracture, some principles for rock fracture are usually adopted to confirm when and in which direction the rock fractures occur under stress. Usually, tectonic fracture appears in several forms such as tension fracture, conjugate shear fracture and tension-shear fracture. It is necessary to comprehensively apply the tension fracture principle and the shear fracture principle in case studies. On the basis of Coulumh-Mohr and Griffith fracture principles, this paper puts forward rock-cracking examination principle for low-permeability sand reservoir in combination with the results of rock mechanical test, in which Griffith principle is applied to tension fracture examination, while Coulumh-Mohr principle to shear fracture examination.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2007年第4期393-395,共3页
Xinjiang Petroleum Geology
