Cause analysis and precautions of horizontal well perforator sticking in Moxi gas field

Perforating is a major technology in the completion of horizontal well with high formation pressure.To find out the causes of horizontal well perforator sticking in Moxi gas field,drilling fluid,wellbore trajectory,wellhead junks,casing deformation, perforator deformation,gap between perforator and casing,perforating debris,perforating technology are analyzed in this paper.True casuesof perforator sticking are derived from the combination of case study and field application,at the same time a set of precautions are developed.During the subsequent horizontal well perforation,technology for field operation is changed,i.e.the perforator is changed into 7-inch casing after perforating.As a result,perforator sticking is never caused again.Application results show that the new technology is effective.