US2011162846A1PendingUtilityA1

Multiple Interval Perforating and Fracturing Methods

34
Individually held — no corporate assignee on recordPriority: Jan 6, 2010Filed: Jan 6, 2010Published: Jul 7, 2011
Est. expiryJan 6, 2030(~3.4 yrs left)· nominal 20-yr term from priority
Inventors:Troy F. PalidwarBrock MillerFraser McneilLoyd East
E21B 43/26E21B 43/114
34
PatentIndex Score
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Claims

Abstract

A method for perforating and fracturing a wellbore in a single trip may include installing one or more reservoir access subs on a liner at pre-determined intervals. The method may also include running the liner into the wellbore, securing the liner to the wellbore, and running a bottomhole assembly into the wellbore. The method may further include activating at least one of the reservoir access subs so as to allow fluid communication between the liner and the wellbore, and fracturing at least one interval proximate the activated reservoir access sub. The steps of running the bottomhole assembly into the wellbore, activating the reservoir access subs, and fracturing the interval may be performed in a single trip into the wellbore.

Claims

exact text as granted — not AI-modified
1 . A method for perforating and fracturing a wellbore in a single trip comprising:
 (a) installing one or more reservoir access subs on a liner at pre-determined intervals;   (b) running the liner into the wellbore;   (c) securing the liner to the wellbore;   (d) running a bottomhole assembly into the wellbore;   (e) activating at least one of the reservoir access subs so as to allow fluid communication between the liner and the wellbore; and   (f) fracturing at least one interval proximate the activated reservoir access sub;   wherein steps (d), (e), and (f) are performed in a single trip into the wellbore.   
     
     
         2 . The method of  claim 1 , wherein at least one of the reservoir access subs comprises one or more ports at least partially filled with a soluble material, and wherein activating the reservoir access subs comprises reverse circulating a solvent to dissolve the soluble material in the ports. 
     
     
         3 . The method of  claim 1 , wherein at least one of the reservoir access subs comprises one or more jets at least partially filled with a soluble material, and wherein activating the reservoir access subs comprises reverse circulating a solvent to dissolve the soluble material in the jets. 
     
     
         4 . The method of  claim 1 , wherein at least one of the reservoir access subs comprises one or more ports with burst disks, and wherein activating the reservoir access subs comprises isolating at least one of the reservoir access subs with a straddle packer and applying pressure to burst the disks. 
     
     
         5 . The method of  claim 1 , wherein at least one of the reservoir access subs comprises at least one shifting sleeve, and wherein activating the reservoir access subs comprises applying pressure to open the shifting sleeve to expose fracports, jets, and/or soluble jets. 
     
     
         6 . The method of  claim 1 , comprising repeating step (e) for additional reservoir access subs. 
     
     
         7 . The method of  claim 1 , comprising installing an interval locator on the liner prior to running the liner into the wellbore. 
     
     
         8 . The method of  claim 1 , wherein securing the liner to the wellbore comprises placing cement in an annulus formed between the liner and the wellbore, and allowing the cement to set. 
     
     
         9 . The method of  claim 1 , wherein securing the liner to the wellbore comprises setting one or more packers in an annulus formed between the liner and the wellbore. 
     
     
         10 . The method of  claim 1 , wherein fracturing comprises using a straddle technique. 
     
     
         11 . The method of  claim 1 , comprising repeating steps (e)-(f) for one or more additional intervals. 
     
     
         12 . The method of  claim 1 , wherein the bottomhole assembly comprises at least one straddle packer. 
     
     
         13 . The method of  claim 1 , wherein the bottomhole assembly comprises a Cobra Frac® bottomhole assembly. 
     
     
         14 . The method of  claim 1 , comprising isolating the interval, wherein isolating is performed prior to fracturing. 
     
     
         15 . A method for perforating and fracturing a wellbore in a single trip comprising:
 (a) running a liner into the wellbore;   (b) securing the liner to the wellbore;   (c) running a bottomhole assembly into the wellbore;   (d) establishing fluid communication between the liner and the wellbore; and   (e) fracturing at least one interval proximate the fluid communication;   wherein steps (c), (d), and (e) are performed in a single trip into the wellbore; and   wherein steps (d) and (e) are repeated in the single trip into the wellbore.   
     
     
         16 . The method of  claim 15 , comprising installing at least one punch tool on the bottomhole assembly prior to running the bottomhole assembly into the wellbore, wherein establishing fluid communication between the liner and the wellbore comprises activating the punch tool. 
     
     
         17 . The method of  claim 15 , comprising installing one or more subs on the liner at pre-determined intervals prior to running the liner into the wellbore, wherein the subs comprise comprising hydraulically activated charges, and wherein establishing fluid communication between the liner and the wellbore comprises isolating at least one of the subs with a straddle packer, and applying hydraulic pressure to activate the charges. 
     
     
         18 . The method of  claim 17 , wherein the hydraulically activated charges comprise at least one gun. 
     
     
         19 . The method of  claim 15 , comprising installing an interval locator on the liner prior to running the liner into the wellbore. 
     
     
         20 . The method of  claim 15 , wherein securing the liner to the wellbore comprises placing cement in an annulus formed between the liner and the wellbore, and allowing the cement to set. 
     
     
         21 . The method of  claim 15 , wherein securing the liner to the wellbore comprises setting one or more packers in an annulus formed between the liner and the wellbore. 
     
     
         22 . The method of  claim 15 , wherein fracturing comprises using a Cobra Frac® technique. 
     
     
         23 . The method of  claim 15 , comprising repeating steps (d)-(e) for one or more additional intervals. 
     
     
         24 . The method of  claim 15 , wherein the bottomhole assembly comprises at least one straddle packer.

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