Method for creating branch seam with temporary plugging and pressure buildup using super absorbent resin

a super absorbent resin and branch seam technology, applied in fluid removal, chemistry apparatus and processes, borehole/well accessories, etc., can solve the problems of low fracturing efficiency, difficult to extrude complex multi-level fracture networks, and hot issue of unconventional oil and gas resources, etc., to increase the production of oil, increase the fracture network area, and strengthen the connection
US20200182034A1Inactive Publication Date: 2020-06-11XI'AN PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
XI'AN PETROLEUM UNIVERSITY
Publication Date
2020-06-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for creating a branch fracture with temporary plugging and pressure buildup using super absorbent resin, comprising: setting a fracturing packer to fracture a target layer by pad fluid to form a main fracture; injecting into the main fracture pad fluid mixed with salt-intolerant super absorbent resin and performing replacement till depth of the main fracture, and then injecting pad fluid mixed with strong salt-tolerant super absorbent resin; after the strong salt-tolerant super absorbent resin absorbs water and expands to form a temporary plugging layer, re-injecting the pad fluid to create a branch fracture with pressure buildup; and lifting injection pressure to break up the temporary plugging layer formed by the strong salt-tolerant super absorbent resin to form residue, transporting the residue to the depth of the main fracture to bridge the temporary plugging layer formed, and re-building up pressure to create a branch fracture.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of priority from Chinese Patent Application No. 201811495751.X, filed on Dec. 7, 2018. The content of the aforementioned application, including any intervening amendments thereto, is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] The invention relates to the field of petroleum engineering hydraulic fracturing, and in particular, to a method for creating a branch fracture with temporary plugging and pressure buildup using super absorbent resin.BACKGROUND OF THE INVENTION

[0003] With the acceleration of the exploration and development of unconventional oil and gas resources such as tight oil, shale gas and coalbed gas, the effective development of unconventional oil and gas resources has become a hot issue in the world. Hydraulic fracturing technology is an effective means for economic development of unconventional oil and gas. However, in order to form a sand packed fracture with hig...

Claims

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