公开(公告)号：US20220243584A1

公开(公告)日：2022-08-04

申请号：US17504806

申请日：2021-10-19

申请人： Tongji University

发明人： Fengshou Zhang ,  Rui Feng ,  Zirui Yin ,  Shutian Cao ,  Luanxiao Zhao

IPC分类号： E21B47/107 ,  E21B47/14

摘要： The present disclosure relates to a method for pre-warning deformation of a casing pipe according to a change feature of the b-value of the hydraulic fracturing induced microseismicity. Based on number distribution and seismic magnitudes of hydraulic fracturing induced microseismic monitoring events, a b-value of microseismicity in a fracturing stage is calculated according to a Gutenberg-Richter relation describing frequency-seismic magnitude distribution in seismology, and whether fault activation occurs in a fracturing process is identified according to a change feature of the b-value. According to the method, a cumulative effect of fault activation in the hydraulic fracturing process is considered, and symptoms of fault activation in the fracturing process can be accurately identified, so as to pre-warn deformation of the casing pipe.

公开(公告)号：US11560789B2

公开(公告)日：2023-01-24

申请号：US17504806

申请日：2021-10-19

申请人： Tongji University

发明人： Fengshou Zhang ,  Rui Feng ,  Zirui Yin ,  Shutian Cao ,  Luanxiao Zhao

IPC分类号： E21B47/107 ,  E21B47/14

摘要： The present disclosure relates to a method for pre-warning deformation of a casing pipe according to a change feature of the b-value of the hydraulic fracturing induced microseismicity. Based on number distribution and seismic magnitudes of hydraulic fracturing induced microseismic monitoring events, a b-value of microseismicity in a fracturing stage is calculated according to a Gutenberg-Richter relation describing frequency-seismic magnitude distribution in seismology, and whether fault activation occurs in a fracturing process is identified according to a change feature of the b-value. According to the method, a cumulative effect of fault activation in the hydraulic fracturing process is considered, and symptoms of fault activation in the fracturing process can be accurately identified, so as to pre-warn deformation of the casing pipe.