Time-dependent closure and permeability of a hydraulic fracture under constant normal stress
作者单位：Tohoku UniversitySendaiJapan
会议名称：《The 2001 ISRM International Symposium-2nd Asian Rock Mechanics Symposium(ISRM 2001-2nd ARMS)》
会议日期：2001年
学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）]
摘 要：正Time-dependent closure and permeability of a small-scale hydraulic fracture created in granite and sandstone were measured under constant normal *** time-dependent closure increased to be constant at 50 to 70 hours for both *** ultimate time-dependent closure did not depend on the normal stress when the elastic closure curve obeyed the Goodman’s formula as for granite,while it increased with the normal stress when the elastic closure curve did not obey the Goodman’s formula as for sandstone. The hydraulic aperture decreased with time to be constant at about 50 hours for both *** hydraulic aperture produced by the elastic closure was very small（2.2 to 3.5μm）.and was finally 1.3 to 1.8μ*** larger the initial hydraulic aperture was,the more the hydraulic aperture decreased with time,regardless of the normal *** decrease in the hydraulic aperture was small in comparison with the increase in the time-dependent closure for both *** was because the fractures used in this study were all well mated and,accordingly,the contact area was developed well.