CASING PERFORATING AND EROSION SYSTEM FOR CAVERN EROSION IN A HEAVY OIL FORMATION AND METHOD OF USE

摘要

A system and method for forming a cavern in a formation beyond acased wellbore utilizes a locator to position a perforating gun in thewellbore forforming axially aligned, spaced-apart perforations through the casing. Thelocatorhas a stationary portion, run in and anchored in the wellbore below a zone ofinterest. The perforating guns have a moveable portion of the locator at adownholeend and are run in and coupled with the stationary portion. Where two or moregunsare used to form the perforations, the guns are indexed relative to oneanother forforming the offset perforations. The guns are tripped from the wellbore and awashtool having a moveable portion of the locator at a downhole end is run in andcoupled in the wellbore. The locator acts to delimit a reciprocation of thewash toolalong the space-apart perforations for delivering a non-abrasive fluidtherethroughfor forming the cavern.