文档介绍：Model of Initiation Angle under hydraulic
Refracturing Subtitle as needed
Wangtingting
Zhaowanchun
Daqing Petroleum Institute
Daqing Petroleum Institute
Institute of Electrical and Information Engineering
Petroleum Engineering Institute
Daqing, China
Daqing, China
2007wangtingting@
zhaowanchunboss@
Abstract—Considered pore pressure of the injection/production around the refracturing district; Elbel[5-6] gave the diversion
around the refracturing well under coupling liquid/solid, theory of fracture in 1993, and he pointed out that the pore
Mathematical models were established, which were the pressure induced by fracture extend made the maximum
maximum principal stress and orientation angle of maximum horizontal stress decrease less than the minimum horizontal
principal stress induced by pore pressure around refracturing stress, and the new fractures could extended along the
wells. Considered that the initial artificial fracture was full of orientation of the vertical original fracture; Bruno and
petent pressible fluid, affection efficient of fluid is Nakagawa[7] indicated that initiation and orientation of the
presented, the model of stress field induced by initial artificial fracture were affected by pore pressure from experiment in
fracture was established. According to the linear 1991, the fracture would turn toward