A kind of hydraulic fracturing proppant and its preparation method and application

A hydraulic fracturing and proppant technology, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve the problems of repeated operation procedures, complex matching, short action time, etc., and achieve long-term and uniform release , The effect of simple construction and safe use

Active Publication Date: 2022-08-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The current mainstream wax control technology has a certain range of application, but the effect of wax control in low-yield oil wells and high water-cut wells is not ideal, and there are many problems such as complex matching, repeated operating procedures, short action time, and restrictions on wellbore temperature and ground conditions. Shortcoming, for this the present invention provides a kind of hydraulic fracturing proppant and preparation method and application

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  • A kind of hydraulic fracturing proppant and its preparation method and application
  • A kind of hydraulic fracturing proppant and its preparation method and application
  • A kind of hydraulic fracturing proppant and its preparation method and application

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Embodiment 1

[0044] This embodiment relates to a hydraulic fracturing proppant, such as figure 1 As shown in the figure, it includes a proppant inner core 1, a solid wax-preventing layer 2 and a protective layer 3 that are sequentially wrapped around the outside of the proppant inner core from the inside to the outside; Granules or quartz sand; the solid anti-paraffin layer 2 is composed of a main anti-paraffin agent, a dissolution rate control agent, a dispersant, and a binder; the protective layer 3 is a degradable nanomaterial.

[0045] After the hydraulic fracturing pre-fluid stage is completed, the hydraulic fracturing proppant according to the present invention is injected into the formation instead of the conventional proppant, and then the fracturing operation is continued (the fracturing operation procedure is the same as that of the conventional fracturing). The proppant is added in the initial stage of hydraulic fracturing sand addition and pumped to the deep part of the oil lay...

Embodiment 2

[0047] The present embodiment provides a hydraulic fracturing proppant, which consists of the following components by weight:

[0048] 70-75 parts of ceramsite or quartz sand treated with silane coupling agent;

[0049] 15-20 parts of main wax inhibitor, 4-6 parts of dissolution rate control agent, 3-4 parts of dispersant, 3-4 parts of binder;

[0050] 1-2 parts of degradable nanomaterials.

[0051] Further, the degradable nanomaterial is composed of the following components by weight: starch 35%-45%, nano powder 30%-40%, plasticizer 15%-20%, polyvinyl alcohol 10%-15% %.

[0052] Further, this embodiment further discloses the preparation method of the proppant, such as figure 2 shown, including the following steps:

[0053]S101, preparing degradable nanomaterials, the specific method is as follows: formulating starch, nanometer powder (with a particle size of 15-30 nanometers), plasticizer, and polyvinyl alcohol; melt blending at 140-160 °C, that is to obtain the degrada...

Embodiment 3

[0062] On the basis of the above embodiment, as a preference, the silane coupling agent is vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris(2-methoxyethoxy)silane, A mixture of one or more of γ-aminopropyltrimethoxysilane and γ-aminopropyltriethoxysilane.

[0063] Further, the main wax inhibitor is vinyl acetate-maleic anhydride-acrylamide terpolymer or polyacrylate higher alcohol ester; specifically, the vinyl acetate-maleic anhydride-acrylamide tripolymer. The molar ratio of monomers in the terpolymer is vinyl acetate: maleic anhydride: acrylamide=1: (0.5~1): (0.3~0.5), and the molecular weight of the terpolymer is 2000-10000kDa; the The polyacrylate higher alcohol ester is preferably polytetradecyl acrylate, polyhexadecyl acrylate or polystearyl acrylate.

[0064] The dissolution rate control agent is preferably a vinyl acetate-maleic anhydride copolymer, and the monomer molar ratio of the binary copolymer is vinyl acetate: maleic anhydride=1:2~2:1; the vinyl acetate...

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Abstract

The invention discloses a hydraulic fracturing proppant and a preparation method and application thereof. The hydraulic fracturing proppant is composed of a modified proppant inner core, a solid wax-proof layer and a protective layer. The modified proppant inner core is a silane coupling For the ceramsite or quartz sand treated by the joint agent, the solid wax-proof layer is composed of the main wax-proof agent, the dissolution rate control agent, the dispersant, and the binder; the main component of the protective layer is degradable nanomaterials. The proppant is added in the initial stage of hydraulic fracturing sand addition and pumped to the deep part of the oil layer. After the protective layer is dissolved in the formation temperature and oil, the anti-wax component is slowly released under the action of the dissolution rate control agent. The anti-wax component enters the deep part of the oil layer, so it is not affected by the season, and realizes the long-term and uniform release of the anti-wax component. advantage.

Description

technical field [0001] The invention belongs to the field of oilfield development, and in particular relates to a hydraulic fracturing proppant and a preparation method and application thereof. Background technique [0002] With the continuous reduction of pressure and temperature during the production process, the phenomenon of wax precipitation in oil wells and pipelines is common. Wax precipitation will affect the normal liquid production of oil wells, and even the phenomenon of wax stuck pipe string and wax blockage of surface pipelines will occur in serious cases. It not only requires a lot of manpower, material resources and financial resources to carry out frequent well cleaning and pump inspection operations, but also directly affects oil well production. [0003] At present, the main technical means of oil well wax prevention include oil pipe lining and coating wax prevention, adding wax inhibitor inhibitor and magnetic wax prevention to oil wells. Each method has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/805C09K2208/10
Inventor 李川张矿生唐梅荣苑慧莹张翔李昌恒殷桂琴白晓虎邓咸安李晓燕
Owner PETROCHINA CO LTD
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