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Reticular fibers for fracturing and preparation method thereof

A net-like fiber and fracturing technology, applied in the fiber field, can solve the problems of poor fiber dispersion and fast proppant settling speed, and achieve the effects of improving the settling speed, improving mining efficiency, and good compatibility

Active Publication Date: 2018-10-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the existing fibers are used in fracturing fluids, there are: 1. The dispersion of fibers in fracturing fluids is poor; 2. The settling speed of proppant in fiber fracturing fluids is fast.

Method used

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  • Reticular fibers for fracturing and preparation method thereof
  • Reticular fibers for fracturing and preparation method thereof
  • Reticular fibers for fracturing and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0037] This embodiment provides a method for preparing a mesh fiber for fracturing, which specifically includes the following steps:

[0038] Weigh 10 g of sodium carboxymethyl cellulose into a beaker, add 500 mL of distilled water and leave it for 24 hours until the sodium carboxymethyl cellulose is completely dissolved, then pour it into a 1000 mL four-neck flask, and stir on an electric mixer for 30 minutes;

[0039] Weigh 0.26g of ammonium persulfate as the initiator, dissolve it in 50mL of distilled water, add it to a four-necked flask, and stir the reaction at 40°C for 20min;

[0040] Weigh 4 g of methacryloxyethyl dimethyl octyl ammonium bromide, use distilled water to make a 100 mL solution, and transfer it to a 200 mL ground liquid funnel;

[0041] Add 100mL of the above-mentioned solution to a four-necked flask, control it to finish dripping at about 20min, keep the temperature constant at 40℃, continue to stir and react for 5h-6h, obtain a transparent paste, transfer it to a...

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Abstract

The invention provides reticular fibers for fracturing and a preparation method thereof. The preparation method includes: dissolving sodium carboxymethyl cellulose into water to obtain first mixed liquid; dissolving an initiator into water, adding into the first mixed liquid, and stirring under 40 DEG C to obtain second mixed liquid; dissolving methacryloyloxyethyl dimethyl octyl ammonium bromideinto water to obtain a solution; dropwise adding the solution into the second mixed liquid; stirring under 40 DEG C for 5-6 hours, and washing to obtain the reticular fibers. The reticular fibers havethe advantages that the reticular fibers can fast disperse in fracturing fluid and is good in compatibility with the fracturing fluid, the dispersed reticular fibers are in a reticular structure in the fracturing fluid, and accordingly the settling velocity of a propping agent is improved, and exploitation efficiency is further increased.

Description

Technical field [0001] The invention relates to a fiber, in particular to a mesh fiber for fracturing, and belongs to the technical field of oil exploitation. Background technique [0002] The fracturing operation includes 2 liquid injection stages. In the first stage, the prefluid is injected without proppant, and pumped at a certain flow and pressure to fract the formation and produce cracks, which play a role in creating fractures; in the second stage, the sand-carrying liquid is injected to pump the sand to the open In the crack, the crack closed after stopping the pump. In the process of injection and fracture closure, the sedimentation velocity of the proppant has a greater impact on the fracturing fluid's sand-carrying capacity, and the fracturing fluid's sand-carrying capacity directly affects the final geometric structure of the propped fracture, which in turn affects the productivity. [0003] When there is no fiber, the sedimentation process of proppant follows Stokes'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/02D01F8/10C09K8/68
CPCC09K8/68C09K8/685C09K8/90C09K8/905D01F8/02D01F8/10
Inventor 李霞李军李超徐乐李玉印包放关伟曾双红
Owner PETROCHINA CO LTD