Method and apparatus for stimulation of multiple formation intervals

A method of perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore, said method comprising:

• (a) deploying a bottom-hole assembly (“BHA”) using a deployment means selected from the group consisting of a wireline, a slickline, and a cable, said BHA having a perforating device, a sealing mechanism and at least one pressure equalization means;
• (b) using said perforating device to perforate an interval of said one or more subterranean formations;
• (c) actuating said sealing mechanism so as to establish a hydraulic seal in said wellbore;
• (d) pumping a treating fluid in said wellbore;
• (e) establishing pressure communication between the portions of the wellbore above and below said scaling mechanism through said at least one pressure equalization means;
• (f) releasing said sealing mechanism;
• and
• (h) repeating steps (b) through (f) for at least one additional interval of said one or more subterranean formations.

A stimulation treatment system for use in perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore, said system comprising:

• (a) a treating fluid;
• (b) a tubing string for deployment within said wellbore;
• (c) means for pumping said treating fluid down the annulus between said tubing string and said wellbore;
• (d) a bottom-hole assembly (BHA) adapted to be deployed in said wellbore with said tubing siring, said BHA having at least one perforating device for sequentially perforating said multiple intervals, at least one sealing mechanism, and at least one pressure equalization means, said BHA capable of being positioned within said wellbore, to allow actuation of said perforating device, said sealing mechanism and said pressure equalization means;
• (e) said sealing mechanism capable of establishing a hydraulic seal in said wellbore, said pressure equalization means capable of establishing pressure communication between portions of said wellbore above and below said sealing mechanism, and said sealing mechanism farther capable of releasing said hydraulic seal to allow said BHA to move to a different position within said wellbore, thereby allowing each of said multiple treatment intervals to be treated with said treating fluid separately from said other treatment intervals.

A stimulation treatment system for use in perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore, said system comprising:

• (a) a treating fluid;
• (b) a deployment means deployed within said wellbore, said deployment means being selected from the group consisting of a wireline, a slickline, and a cable;
• (c) a bottom-hole assembly (BHA) adapted to be deployed in said wellbore with said deployment means, said BHA having at least one perforating device for sequentially perforating said multiple intervals, at least one sealing mechanism, and at least one pressure equalization means, said BHA capable of being positioned within said wellbore, to allow actuation of said perforating device, said sealing mechanism and said pressure equalization means;
• (d said sealing mechanism capable of establishing a hydraulic seal in said wellbore, said pressure equalization means capable of establishing pressure communication between portions of said wellbore above and below said sealing mechanism, and said sealing mechanism further capable of releasing said hydraulic seal to allow said BHA to move to a different position within said wellbore, thereby allowing each of said multiple treatment intervals to be treated with said treating fluid separately from said other treatment intervals.

An apparatus for use in perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore, said apparatus comprising:

• (a) a bottom-hole assembly (BHA), having a tubing string for deployment in said wellbore, said BHA having at leant one perforating device for sequentially perforating said multiple intervals, at least one sealing mechanism and at least one pressure equalization means;
• and
• (b) said sealing mechanism capable of establishing a hydraulic seal in said wellbore said pressure equalization means capable of establishing pressure communication between portions of said wellbore above and below said sealing mechanism, and said sealing mechanism further capable of releasing maid hydraulic seal to allow said BHA to move to a different position within said wellbore, thereby allowing each of said multiple treatment intervals to be treated separately from said other treatment intervals;
• and
• (c) a means for pumping treating fluid down the annular region between said tubing string and said wellbore.

An apparatus for use in perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore, said apparatus comprising:

• (a) a bottom-hole assembly (BHA), adapted to be deployed in said wellbore by a deployment means selected from the group consisting of a wireline, a slickline, and a cable;
• said BHA having at least one perforating device for sequentially perforating said multiple intervals, at least one sealing mechanism and at least one pressure equalization means;
• and
• (b) said sealing mechanism capable of establishing a hydraulic seal in said wellbore, said pressure equalization means capable of establishing pressure communication between portions of said wellbore above and below said sealing mechanism, and said sealing mechanism further capable of releasing said hydraulic seal to allow said BHA to move to a different position within said wellbore thereby allowing each of said multiple treatment intervals to be treated separately from said other treatment intervals.

A stimulation treatment system for use in perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore, said system comprising:

• (a) a treating fluid;
• (b) a deployment means deployed within said wellbore,
• (c) a bottom-hole assembly (BHA) adapted to be deployed in said wellbore with said deployment means, said BHA having at least one perforating device for sequentially perforating said multiple intervals, at least one scaling mechanism, at least one pressure equalization means, and a depth-control device selected from the group consisting of a casing collar locator and a surface measurement system, said BHA capable of being positioned within said wellbore, to allow actuation of said perforating device, said sealing mechanism and said pressure equalization means;
• (d) said sealing mechanism capable of establishing a hydraulic seal in said wellbore, said pressure equalization means capable of establishing pressure communication between portions of said wellbore above and below said sealing mechanism, and said sealing mechanism further capable of releasing said hydraulic seal to allow said BHA to move to a different position within said wellbore, thereby allowing each of said multiple treatment intervals to be treated with said treating fluid separately from maid other treatment intervals.

A method of perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore, said method comprising:

• (a) deploying a bottom-hole assembly (“BHA”) using deployment means within said wellbore, said BHA having a perforating device, a sealing mechanism, at least one pressure equalization means, and a depth-control device selected from the group consisting of a casing collar locator and a surface measurement system;
• (b) using said perforating device to perforate an interval of said one or more subterranean formations;
• (c) actuating said sealing mechanism so as to establish a hydraulic seal in said wellbore;
• (d) pumping a treating fluid in said wellbore and into the perforations created by said perforating device, without removing said performing device from said wellbore;
• (e) establishing pressure communication between the portions of the wellbore above and below said sealing mechanism through said at least one pressure equalization means;
• (f) releasing said sealing mechanism;
• and
• (g) repeating steps (b) through (f) for at least one additional interval of said one or more subterranean formations.