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Degradable material

A technology for degrading materials and resins, applied in chemical instruments and methods, single-component polyester rayon, drilling compositions, etc., can solve the problems of temporary plugging agent waste and inability to effectively reach the target fracture area, etc.

Active Publication Date: 2020-11-24
PUJING CHEM IND SHA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a degradable material in order to solve the above problems, to solve the problem that the existing fibrous temporary plugging agent is easily intercepted by the protruding wall teeth on the surface of the underground formation fracture when it is used, and cannot effectively reach the target fracture area. Causes waste of temporary plugging agent, and is not conducive to effective accumulation and bridging in the corresponding fractures in a short period of time to form a plugging zone with a stable pressure bearing effect

Method used

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Embodiment Construction

[0069] After extensive and in-depth research, the inventor has found that one or more bundles of fibers are twisted or braided to form a wire bundle, and the wire bundle is formed into a connecting knot or knot that protrudes outward relative to the wire bundle itself, which is beneficial to the original dispersion. The fibers are gathered together. Driven by the downhole fluid, the fibers move with the downhole fluid in units of wire bundles with prominent connecting knots or knots. When they move to the target fracture, the connecting knots or knots on the wire harness The target fractures can be sealed independently or overlapped with each other, which is conducive to the rapid formation of a sealing zone with a stable pressure bearing effect.

[0070] In addition, the structural design of connecting knots or knots can effectively prevent or avoid the fact that the fibers constituting the wire bundle are easily entangled and wound with each other during the actual pumping pr...

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Abstract

The invention relates to a degradable material. The degradable material comprises at least two wire harnesses, wherein the at least two wire harnesses form connecting knotted buckles, which protrude outwards relative to each wire harness, through mutual staggered winding and knotting, and the at least two wire harnesses are gathered together by the connecting knotted buckles; or the degradable material comprises one wire harness, and knotted buckles which protrude outwards relative to the wire harness are formed on the wire harness. The degradable material with the knotted buckles, disclosed by the invention, can do self-adapting deformation under compressed conditions; and when the degradable material is applied to downhole temporary-plugging fracturing construction, the degradable material can be mutually stacked and bridged at a target crack to serve as a plugging belt for stabilizing a pressure bearing effect, the phenomenon that disordered clew-like fiber aggregates are formed dueto the fact that fibers forming the wire harness are prone to mutual winding and coiling during actual pump injection can be effectively prevented or avoided, wasting of a fiber temporary plugging agent can be effectively reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a degradable material. Background technique [0002] At present, during the exploitation of oil and gas fields, in order to improve the permeability of underground reservoirs and connect oil and gas reservoirs in low-permeability areas, it is usually necessary to perform temporary plugging and diversion to fracturing. Temporary plugging diversion fracturing construction is to add temporary plugging materials in real time during the fracturing construction according to the heterogeneity of the reservoir plane and vertical direction, as well as the difference in the production degree of different regions and layers, and temporarily plug old fractures or existing cracks. Sand fractures divert fluid through changes in fracture pressure and fracture extension pressure to form new artificial fractures (hereinafter referred to as "new fractures") to open new oil and gas seepag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C09K8/88D01F6/62D01F6/92D01F1/10D01F8/14
CPCC09K8/5086C09K8/885D01F6/62D01F6/92D01F1/10D01F8/14C09K2208/08
Inventor 谭磊毛彦鹏黄维捷纪海霞
Owner PUJING CHEM IND SHA
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