Burst disk-actuated shaped charges, systems and methods of use

摘要

One or more burst disks, for isolating downhole communication between a tubular and a hydrocarbon-bearing formation, are fit with a shaped explosive charge. Detonation of the shaped charge is initiated by the rupture of the burst disk. In a system for stimulating the formation, one or more sets of two or more shaped charge, enhanced burst disks are located at a location along the tubular corresponding to a selected interval for stimulation. The enhanced burst disks can be fit with a chamber of known pressure for establishing a known and significant pressure differential across the burst disk for enabling substantially simultaneous rupture at the selected interval.

主权项

1. A method for stimulating one or more hydrocarbon-containing intervals of interest in a subterranean formation for producing oil and gas through a wellbore, comprising:
running a completion string into the wellbore, the completion string having a wall for forming an exterior annulus between the wall and the formation, a bore and one or more stimulation locations spaced therealong, each stimulation location comprising
a least one set of burst disk assemblies disposed thereat, each burst disk assembly having a burst disk in a port extending through the wall, the burst disk positioned adjacent the bore of the completion string, and a cap spaced therefrom and releaseably fit to the port for forming a sealed pressure chamber therebetween at a constant pressure, whereinone or more of the burst disk assemblies further comprises a shaped charge and detonator located in the port between the cap and the formation; isolating the exterior annulus at a selected interval of the one or more intervals of interest; running a treatment tool into the completion string and forming a treatment annulus therebetween, the treatment tool having uphole and downhole isolation devices for sealing in the treatment annulus and a treatment port therebetween; positioning the treatment tool adjacent a selected stimulation location of the one or more stimulation locations corresponding to the selected interval, the uphole and downhole isolation devices sealing the treatment annulus thereabout; flowing fluid through the bore of the treatment tool to flow into the treatment port to the isolated treatment annulus for increasing a fluid pressure therein to a threshold pressure for rupturing all of the burst disks in the at least one set of burst disk assemblies at the selected stimulation location for displacing the caps therefrom for fluidly connecting the bore with the treatment annulus and initiating detonation of the shaped charges for forming perforations in the formation at the selected interval.