Well treatment
First Claim
Patent Images
1. A method, comprising:
- placing a downhole completion staging system tool in a wellbore adjacent a subterranean formation;
operating the downhole completion staging system tool to establish one or more passages for fluid communication between the wellbore and the subterranean formation in a plurality of wellbore stages spaced along the wellbore;
isolating one of the wellbore stages for treatment;
injecting an in situ channelization treatment fluid through the wellbore and the one or more passages of the isolated wellbore stage into the subterranean formation to form within a fracture a homogeneous region of continuously uniform distribution of solid particulates and thereafter aggregate the solid particulates to place clusters in the fracture; and
repeating the isolation and clusters placement for one or more additional stageswherein the in situ channelization treatment fluid comprises a viscosified carrier fluid, the solid particulates, a breaker, and at least an anchorant, the breaker inducing settling of the solid particulates prior to closure of the fracture.
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Abstract
In situ channelization treatment fluids are used in a multistage well treatment. Also, methods, fluids, equipment and/or systems relating to in situ channelization treatment fluids are used for treating a subterranean formation penetrated by a wellbore.
358 Citations
18 Claims
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1. A method, comprising:
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placing a downhole completion staging system tool in a wellbore adjacent a subterranean formation; operating the downhole completion staging system tool to establish one or more passages for fluid communication between the wellbore and the subterranean formation in a plurality of wellbore stages spaced along the wellbore; isolating one of the wellbore stages for treatment; injecting an in situ channelization treatment fluid through the wellbore and the one or more passages of the isolated wellbore stage into the subterranean formation to form within a fracture a homogeneous region of continuously uniform distribution of solid particulates and thereafter aggregate the solid particulates to place clusters in the fracture; and repeating the isolation and clusters placement for one or more additional stages wherein the in situ channelization treatment fluid comprises a viscosified carrier fluid, the solid particulates, a breaker, and at least an anchorant, the breaker inducing settling of the solid particulates prior to closure of the fracture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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placing a downhole completion staging tool in a wellbore adjacent a subterranean formation; operating the downhole completion staging tool to establish one or more passages for fluid communication between the wellbore and the subterranean formation in a plurality of wellbore stages spaced along the wellbore; isolating one or more of the wellbore stages for treatment; injecting an in situ channelization treatment fluid through the wellbore and the one or more passages of the isolated wellbore stage into the subterranean formation to form within a fracture a homogeneous region of continuously uniform distribution of solid particulates and thereafter aggregate the solid particulates to place clusters in the fracture; circulating an in situ channelization treatment fluid through the isolated wellbore stage to facilitate removal of proppant from the wellbore stage; and repeating the isolation, clusters placement and slurry treatment fluid circulation for one or more additional stages wherein the in situ channelization treatment fluid comprises a carrier fluid, the solid particulates, a breaker, and at least an anchorant, the breaker inducing settling of the solid particulates prior to closure of the fracture. - View Dependent Claims (16, 17)
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18. A method, comprising:
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placing a downhole completion staging tool in a wellbore adjacent a subterranean formation; operating the downhole completion staging tool to establish one or more passages for fluid communication between the wellbore and the subterranean formation in a plurality of wellbore stages spaced along the wellbore; injecting an in situ channelization treatment fluid through the wellbore and the one or more passages into the subterranean formation to form within a fracture a homogeneous region of continuously uniform distribution of solid particulates and a breaker, and thereafter aggregate the at least one solid particulates to place clusters in the fracture; wherein the breaker induces settling of the at least one solid particulate in the fracture prior to closure of the fracture; moving the downhole completion staging tool away from the one or more passages either before, during or after the injection without removing the downhole completion staging tool from the wellbore; deploying a diversion agent to block further flow through the one or more passages; circulating an in situ channelization treatment fluid through the wellbore as the injected treatment fluid or as a flush to facilitate removal of proppant from the wellbore; and repeating the downhole completion staging tool placement and operation, clusters placement, downhole completion staging tool movement and in situ channelization treatment fluid circulation for one or more additional stages.
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Specification