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Scattering treatment method for hydrophilic chopped fiber for fracturing

A technology of chopped fibers and a treatment method, which is applied in the field of dispersing treatment of hydrophilic chopped fibers for fracturing, can solve the problems of low sand-carrying performance, difficult to disperse in agglomeration, and fibers floating on the surface of fracturing fluid, etc. The effect of enhancing sand-carrying performance, improving sand-carrying performance and improving fiber fracturing effect

Active Publication Date: 2016-03-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liaohe Oilfield Company began to study fiber fracturing technology in 1995, and conducted fiber fracturing tests in more than 10 wells with three types of fibers, and achieved successful fracturing results. The fiber is prone to technical problems such as fiber floating on the surface of the fracturing fluid, hard to disperse in agglomeration, and low sand-carrying performance, which affect the fiber fracturing effect

Method used

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  • Scattering treatment method for hydrophilic chopped fiber for fracturing
  • Scattering treatment method for hydrophilic chopped fiber for fracturing
  • Scattering treatment method for hydrophilic chopped fiber for fracturing

Examples

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Embodiment 1

[0046] This embodiment provides undissolved and dispersed hydrophilic chopped fibers for fracturing, wherein the hydrophilic chopped fibers for fracturing are sprayed and impregnated with fiber surface treatment agents After treatment, obtained by drying;

[0047] Among them, the fiber surface treatment agent, based on its total weight as 100%, includes: polyether modified silicone oil 8.2%, γ-glycidyl ether oxypropyltrimethoxysilane 0.35%, Span600.25%, Tween800.42 %, 0.06% of perfluorooctyl polyoxyethylene ether nonionic fluorocarbon surfactant, 0.33% of ethylene glycol, 0.40% of carboxymethyl starch and the balance of deionized water.

[0048] The fiber surface treatment agent is prepared by the following method:

[0049] Add polyether modified silicone oil, γ-glycidyl etheroxypropyltrimethoxysilane, Span60, Tween80, perfluorooctyl polyoxyethylene ether non-ionic fluorocarbon surfactant, Alcohol and carboxymethyl starch were mixed at 40° C. under normal pressure for 2 hour...

Embodiment 2

[0075] This embodiment provides undissolved and dispersed hydrophilic chopped fibers for fracturing, wherein the hydrophilic chopped fibers for fracturing are sprayed and impregnated with fiber surface treatment agents After treatment, obtained by drying;

[0076] Among them, the fiber surface treatment agent, based on its total weight as 100%, includes: 8.5% of hydrophilic diamino silicone oil, 0.38% of vinyl triethoxysilane, 0.25% of Span60, 0.41% of Tween80, perfluorooctyl 0.07% polyoxyethylene ether non-ionic fluorocarbon surfactant, 0.34% ethylene glycol, 0.38% carboxymethyl starch and the balance of deionized water.

[0077] The fiber surface treatment agent is prepared by the following method:

[0078] Add hydrophilic diamino silicone oil, vinyl triethoxysilane, Span60, Tween80, perfluorooctyl polyoxyethylene ether non-ionic fluorocarbon surfactant, ethylene glycol and carboxymethyl in deionized water in proportion Starch, after mixing for 3 hours at 45°C under normal...

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Abstract

The invention provides a scattering treatment method for hydrophilic chopped fibers for fracturing. The method comprises steps as follows: the hydrophilic chopped fibers for fracturing are sent to a degglomerator for degglomeration; the hydrophilic chopped fibers for fracturing are obtained by drying to-be-treated chopped fibers after the to-be-treated chopped fibers are subjected to spraying, immersion and / or moisture treatment through a fiber surface treating agent. The surface treating agent comprises 5%-30% of a hydrophilic oil agent, 0.05%-2.0% of a coupling agent, 0.2%-1.0% of a wettable surfactant, 0.05%-10.0% of an aid, 0.1%-0.8% of a densifier and the balance of water, and the sum of all the components is 100%. The degglomerated hydrophilic chopped fibers, prepared with the method, for fracturing easily enter a water-based fracturing fluid, can be uniformly dispersed in the water-based fracturing fluid and are not clustered, the sand carrying performance of the water-based fracturing fluid is enhanced, and the fiber fracturing effect is improved.

Description

technical field [0001] The invention relates to a method for breaking up hydrophilic chopped fibers for fracturing, and belongs to the technical field of petroleum exploration, development and production engineering. Background technique [0002] Fiber fracturing technology is to add a certain amount of fibers to the fracturing fluid, and rely on the network-like intertwined structure formed by the uniformly dispersed fibers to fix the proppant, so as to improve the sand-carrying performance of the fracturing fluid and make the proppant uniform in the fracture. It is a practical technology for laying, reducing sand ejection in the formation, preventing proppant backflow, and forming efficient channels to improve the effect of fracturing. [0003] Shale gas fracturing technology at home and abroad has promoted the development of fiber fracturing technology. Liaohe Oilfield Company began to study fiber fracturing technology in 1995, and conducted fiber fracturing tests in mor...

Claims

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Application Information

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IPC IPC(8): D06M15/647D06M15/643D06M13/513D06M15/53D06M13/148D06M15/11D01G7/02D01G7/10C09K8/68D06M101/32
CPCC09K8/68C09K8/90C09K2208/08D01G7/02D01G7/10D06M13/148D06M13/513D06M13/5135D06M15/11D06M15/53D06M15/6436D06M15/647D06M2101/32
Inventor 李军李超李霞徐乐曾双红刘畅任龙韩福柱
Owner PETROCHINA CO LTD
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