Patent EA-004100-B1 (EA)
Title: Method and apparatus for stimulation of multiple formation intervals
Inventor: TOLMAN RANDY C
IPC: E21B43/26
Filed: 2001-02-14
Abstract: 1. A method for 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) from a tubing string within said wellbore, said BHA having a perforating device and a sealing mechanism; (b) installing BHA using deploying means in said position within a wellbore using depth control device; (c) using said perforating device to perforate said interval; (d) activating said sealing mechanism so as to establish a hydraulic seal in said wellbore; (e) pumping a treating fluid in said wellbore and into the perforations created by said perforating device, without removing said perforating device from said wellbore; (f) releasing said sealing mechanism; and (g)repeating steps (b) through (e) for at least one additional interval of said one or more subterranean formations. 2. The method of Claim 1 wherein said deployment means is selected from the group consisting of a wireline, a slickline, and a cable. 3. The method of Claim 1 wherein said deployment means is a tubing string. 4. A method for perforating and treating multiple intervals of one ox 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 within said wellbore, said BHA having a perforating device and a sealing mechanism; (b) using said perforating device to perforate said interval; (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 perforating device from said wellbore; (e) releasing said sealing mechanism, and (f) repeating steps (b) through (e) for at least one additional interval of said one or more subterranean formations. 5. The method of Claim 3 wherein said tubing string is selected from the group consisting of coiled tubing and jointed tubing. 6. The method of Claim 3 wherein said BHA is positioned within said wellbore using a depth-control device selected from the group consisting of a casing collar locator and a surface measurement system. 7. The method of Claim 1 or 4 wherein said perforating device is a select-fire perforating gun containing multiple sets of one or more shaped-charge perforating charges; each of said sets of one or more shaped-charge perforating charges individually controlled and activated by electric or optic signal transmitted via a cable deployed in the wellbore. 8. The method of Claim 3 wherein said perforating device is a jet cutting device that uses fluid pumped down said tubing string to establishing hydraulic communication between said wellbore and said one or more intervals of said one or more subterranean formations. 9. The method of Claim 3 wherein treating fluid is pumped down the annulus between said tubing string and said wellbore. 10. The method of Claim 9 wherein treating fluid is also pumped down said tubing string, through flow ports in said BHA, and into said perforations. 11. The method of Claim 9 wherein a second treating fluid is pumped down said tubing string, through flow ports is said BHA, and into said perforations. 12. The method of Claim 11 wherein second treating fluid is nitrogen. 13. The method of Claim 1 or 4 wherein sealing mechanism, is a resettable packer. 14. The method of Claim 1or 4 wherein treating fluid is selected from the group consisting of an acid solution, an organic solvent, and a slurry of a proppant material and of a carrier fluid. 15. The method of Claim 1 or 4 wherein said method further comprises the step of, prior to releasing said sealing mechanism, deploying at least one diversion agent in said wellbore to block further flow of treating fluid into said perforations. 16. The method of Claim 16 wherein said diversion agent deployed in said wellbore is selected from the group consisting of particulates, gels, viscous fluids, foams, and ball sealers. 17. The method of Claim 1 or 4 wherein sealing mechanism is actuated by hydraulic pressure transmitted from the surface through an umbilical. 18. The method of Claim 1 or 4 wherein perforating device is actuated by hydraulic pressure transmitted from the surface through an umbilical. 19. The method of Claim 1 or 4 wherein perforating device is actuated by hydraulic pressure transmitted from the surface through s wellbore. 20. The method of Claim 3 wherein perforating device is actuated by hydraulic pressure transmitted from the surface through said tubing string. 21. The method of Claim 1 or 4 wherein BHA its repositioned within said wellbore before activating said sealing mechanism. 22. 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 selected from the group consisting of a wireline, a slickline and a cable 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 conventional perforating device, for sequentially perforating said multiple intervals, and at least one sealing mechanism, said BHA capable of being positioned within said wellbore, to allow actuation of said perforating device and said sealing mechanism; (d) said sealing mechanism capable of establishing a hydraulic seal in said wellbore, and 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. 23. 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 conventional perforating device, for sequentially perforating said multiple intervals, and at least one sealing mechanism, said BHA capable of being positioned within said wellbore using a depth control device, to allow actuation of said perforating device and said sealing mechanism; (d) said sealing mechanism capable of establishing a hydraulic seal in said wellbore, and 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. 24. 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, said BHA having at least one conventional perforating device for sequentially perforating said multiple intervals and at least one sealing mechanism; and (b) said sealing mechanism capable of establishing a hydraulic seal in said wellbore, and 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. 25. 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 and at least one sealing mechanism; and (b) said sealing mechanism capable of establishing a hydraulic seal in said wellbore, and 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. 26. An apparatus for use in perforating and treating multiple intervals of one or move subterranean formations intersected by a wellbore, said apparatus comprising: (a) a bottom-hole assembly (BHA), having at least one perforating device for sequentially perforating said multiple intervals and at least one sealing mechanism; (b) tractor device being adapted to move BHA on different positions in wellbore; (c) said sealing mechanism capable of establishing a hydraulic seal in sand wellbore, and 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. 27. The apparatus of Claim 25 wherein said deployment means is tubing string. 28. The apparatus of Claim 27 wherein said tubing string is selected from the group consisting of coiled tubing and jointed tubing. 29. The apparatus of Claim 5 wherein said deployment means is selected from the group consisting of a wireline, a slickline, anal a cable. 30. The apparatus of Claim 24-26 further comprising depth-control means for positioning said BHA in said wellbore selected from the group consisting of a casing collar locator and a surface measurement system. 31. The apparatus of Claim 24-26 wherein said sealing mechanism is a resettable packer. 32. The apparatus of Claims 24-26 wherein said perforating device is a select-fire perforating gun containing multiple sets of one or more shaped-charge perforating ch