US2012152550A1PendingUtilityA1

Method for Inducing Fracture Complexity in Hydraulically Fractured Horizontal Well Completions

48
Assignee: EAST JR LOYD EPriority: Aug 22, 2008Filed: Feb 23, 2012Published: Jun 21, 2012
Est. expiryAug 22, 2028(~2.1 yrs left)· nominal 20-yr term from priority
Inventors:Loyd East
E21B 43/305E21B 43/26
48
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Claims

Abstract

A formation servicing system comprising a casing string, a first sleeve system and a second sleeve system, each of the first and second sleeve system being incorporated within the casing string and each comprising a body defining an axial flowbore and comprising one or more ports, a sliding sleeve being movable between (a) a first position in which the sliding sleeve obstructs fluid communication via the one or more ports and (b) a second position in which the sliding sleeve does not obstruct fluid communication via the one or more ports, and a shifting tool operable to shift the first or second sliding sleeves between their first and second positions.

Claims

exact text as granted — not AI-modified
1 . A subterranean formation servicing system comprising:
 a casing string;   a first sleeve system incorporated within the casing string, the first sleeve system comprising:
 a first body defining a first axial flowbore and comprising a first one or more ports configured to provide a route of fluid communication between the first axial flowbore and an exterior of the first body; 
 a first sliding sleeve, wherein the first sliding sleeve is movable between (a) a first position in which the first sliding sleeve obstructs the route of fluid communication via the first one or more ports and (b) a second position in which the first sliding sleeve does not obstruct the route of fluid communication via the first one or more ports; 
   a second sleeve system incorporated within the casing string, the second sleeve system comprising:
 a second body defining a second axial flowbore and comprising a second one or more ports configured to provide a route of fluid communication between the second axial flowbore and an exterior of the second body; 
 a second sliding sleeve, wherein the second sliding sleeve is movable between (a) a first position in which the second sliding sleeve obstructs the route of fluid communication via the second one or more ports and (b) a second position in which the second sliding sleeve does not obstruct the route of fluid communication via the second one or more ports; and 
   a shifting tool, wherein the shifting tool is operable to selectively and independently shift the first sliding sleeve from the first position to the second position, the first sliding sleeve from the second position to the first position, the second sliding sleeve from the first position to the second position, the second sliding sleeve from the second position to the first position, or combinations thereof.   
     
     
         2 . The system of  claim 1 , wherein the shifting tool comprises one or more actuatable lugs, dogs, keys, or catches, and wherein the one or more lugs, dogs, keys, or catches is configured to selectively engage one of the first sliding sleeve or the second sliding sleeve by a complementary structure. 
     
     
         3 . The system of  claim 2 , wherein the lugs, dogs, keys, or catches are actuatable hydraulically, pneumatically, magnetically, electrically, or combinations thereof. 
     
     
         4 . The system of  claim 1 , wherein the shifting tool is incorporated within a work string, wherein the work string is at least partially disposed within an axial flowbore of the casing string. 
     
     
         5 . The system of  claim 4 , wherein the work string comprises a coiled tubing string, a jointed tubing string, or combinations thereof. 
     
     
         6 . The system of  claim 1 , further comprising a third sleeve system, the third sleeve system comprising:
 a third body defining a third axial flowbore and comprising a third one or more ports configured to provide a route of fluid communication between the third axial flowbore and an exterior of the third body;   a third sliding sleeve, wherein the third sliding sleeve is movable between (a) a first position in which the third sliding sleeve obstructs the route of fluid communication via the third one or more ports and (b) a second position in which the third sliding sleeve does not obstruct the route of fluid communication via the third one or more ports.   
     
     
         7 . The system of  claim 6 , wherein the shifting tool is configured to selectively engage the first sliding sleeve, the second sliding sleeve, and the third sliding sleeve. 
     
     
         8 . The system of  claim 6 , wherein the shifting tool is operable to selectively and independently shift the first sliding sleeve from the first position to the second position, the first sliding sleeve from the second position to the first position, the second sliding sleeve from the first position to the second position, the second sliding sleeve from the second position to the first position, the third sliding sleeve from the first position to the second position, the third sliding sleeve from the second position to the first position, or combinations thereof. 
     
     
         9 . The system of  claim 1 , wherein the first sliding sleeve comprises a first one or more sliding sleeve ports, wherein the first one or more sliding sleeve ports are misaligned from the first one or more ports of the first body when the first sliding sleeve is in the first position, and wherein the first one or more sliding sleeve ports are aligned with the first one or more ports of the first body when the first sliding sleeve is in the second position. 
     
     
         10 . A subterranean formation servicing method comprising:
 positioning a casing string within a wellbore, the casing string having incorporated therein a first sleeve system, a second sleeve system, and a third sleeve system, wherein the first sleeve system comprises:
 a first body defining a first axial flowbore and comprising a first one or more ports configured to provide a route of fluid communication between the first axial flowbore and an exterior of the first body; 
 a first sliding sleeve, wherein the first sliding sleeve is movable between (a) a first position in which the first sliding sleeve obstructs the route of fluid communication via the first one or more ports and (b) a second position in which the first sliding sleeve does not obstruct the route of fluid communication via the first one or more ports, wherein the second sleeve system comprises: 
 a second body defining a second axial flowbore and comprising a second one or more ports configured to provide a route of fluid communication between the second axial flowbore and an exterior of the second body; 
 a second sliding sleeve, wherein the second sliding sleeve is movable between (a) a first position in which the second sliding sleeve obstructs the route of fluid communication via the second one or more ports and (b) a second position in which the second sliding sleeve does not obstruct the route of fluid communication via the second one or more ports, wherein the third sleeve system comprises: 
 a third body defining a third axial flowbore and comprising a third one or more ports configured to provide a route of fluid communication between the third axial flowbore and an exterior of the third body; 
 a third sliding sleeve, wherein the third sliding sleeve is movable between (a) a first position in which the third sliding sleeve obstructs the route of fluid communication via the third one or more ports and (b) a second position in which the third sliding sleeve does not obstruct the route of fluid communication via the third one or more ports; 
   transitioning the first sliding sleeve from the first position to the second position;   communicating a servicing fluid to a first zone of the subterranean formation via the first one or more ports;   transitioning the first sliding sleeve from the second position to the first position;   transitioning the second sliding sleeve from the first position to the second position;   communicating the servicing fluid to a second zone of the subterranean formation via the second one or more ports;   transitioning the second sliding sleeve from the second position to the first position;   transitioning the third sliding sleeve from the first position to the second position;   communicating the servicing fluid to a third zone of the subterranean formation via the third one or more ports; and   transitioning the third sliding sleeve from the second position to the first position.   
     
     
         11 . The method of  claim 10 , wherein transitioning the first sliding sleeve from the first position to the second position comprises:
 introducing a shifting tool into the casing string, wherein the shifting tool is incorporated into a work string;   positioning the shifting tool at least partially within the first axial flowbore;   actuating the shifting tool, wherein actuating the shifting tool causes the shifting tool to engage the first sliding sleeve;   moving the work string and the shifting tool with respect to the casing string and the first body, wherein moving the work string and the shifting tool is effective to move the first sliding sleeve from the first position to the second position.   
     
     
         12 . The method of  claim 11 , wherein the shifting tool comprises one or more lugs, dogs, keys, or catches. 
     
     
         13 . The method of  claim 12 , wherein the one or more lugs, dogs, keys, or catches is configured to engage one of the first sliding sleeve, the second sliding sleeve, or the third sliding sleeve by a complementary structure. 
     
     
         14 . The method of  claim 11 , wherein actuating the shifting tool comprises:
 introducing an obturating member into the work string;   pumping the obturating member through the work string to engage a seat within the shifting tool;   applying pressure to the seat via the obturating member, wherein application of pressure to the seat causes shifting tool to engage a complementary structure of the first sliding sleeve.   
     
     
         15 . The method of  claim 10 , wherein the servicing fluid is communicated to the first zone via the first one or more ports prior to the servicing fluid being communicated to the second zone via the second one or more ports, and wherein the servicing fluid is communicated to the second zone via the second one or more ports prior to the servicing fluid being communicated to the third zone via the third one or more ports. 
     
     
         16 . The method of  claim 15 , wherein the third sleeve system is incorporated within the casing string between the first sleeve system and the second sleeve system. 
     
     
         17 . The method of  claim 15 , wherein the second sleeve system is incorporated within the casing string between the first sleeve system and the third sleeve system. 
     
     
         18 . The method of  claim 10 , further comprising:
 transitioning each of the first sleeve system, the second sleeve system, and the third sleeve system from the first positions to the second positions; and   allowing a production fluid to flow into the casing string.   
     
     
         19 . The method of  claim 10 , wherein the servicing fluid comprising a fracturing fluid, a perforating fluid, an acidizing fluid, a proppant laden fluid, or combinations thereof. 
     
     
         20 . A subterranean formation servicing method comprising:
 providing a casing string having incorporated therein a first sleeve system, a second sleeve system, and a third sleeve system;   communicating a wellbore servicing fluid to a first zone of the subterranean formation via the first sleeve system, wherein the wellbore servicing fluid is not communicated via the second sleeve system or the third sleeve system during the communication of the servicing fluid via the first sleeve system;   communicating the wellbore servicing fluid to a second zone of the subterranean formation via the second sleeve system, wherein the wellbore servicing fluid is not communicated via the first sleeve system or the third sleeve system during the communication of the servicing fluid via the second sleeve system;   communicating the wellbore servicing fluid to a third zone of the subterranean formation via the third sleeve system, wherein the wellbore servicing fluid is not communicated via the first sleeve system or the second sleeve system during the communication of the servicing fluid via the third sleeve system; and   providing a route of fluid communication into the wellbore from the first zone via the first sleeve system, from the second zone via the second sleeve system, and from the third zone via the third sleeve system.   
     
     
         21 . The method of  claim 20 , wherein the third sleeve system is incorporated within the casing string between the first sleeve system and the second sleeve system. 
     
     
         22 . The method of  claim 20 , wherein the second sleeve system is incorporated within the casing string between the first sleeve system and the third sleeve system.

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