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Hydraulic fracturing proppant as well as preparation method and application thereof

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

Active Publication Date: 2020-04-10
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

Method used

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  • Hydraulic fracturing proppant as well as preparation method and application thereof
  • Hydraulic fracturing proppant as well as preparation method and application thereof
  • Hydraulic fracturing proppant as well as preparation method and application thereof

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Embodiment 1

[0044] This embodiment relates to a hydraulic fracturing proppant, such as figure 1 As shown, it includes a proppant inner core 1 and a solid anti-wax layer 2 and a protective layer 3 that are wrapped sequentially outside the proppant inner core from the inside to the outside; specifically, the proppant inner core 1 is ceramic treated with a silane coupling agent. grains or quartz sand; the solid anti-wax layer 2 is composed of a main anti-wax agent, a dissolution rate control agent, a dispersant, and a binder; the protective layer 3 is a degradable nano material.

[0045] After the hydraulic fracturing pre-fluid stage is completed, the hydraulic fracturing proppant described in 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 The proppant is added at the initial stage of hydraulic fracturing and s...

Embodiment 2

[0047] This embodiment provides a hydraulic fracturing proppant, which consists of the following components in parts by weight:

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

[0049] 15-20 parts of main anti-wax agent, 4-6 parts of dissolution rate controller, 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 percentage: 35%-45% of starch, 30%-40% of nanopowder, 15%-20% of plasticizer, 10%-15% of polyvinyl alcohol %.

[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: melt-blending the formulated amount of starch, nanopowder (with a particle size of 15-30 nanometers), plasticizer, and polyvinyl alcohol at 140-160°C, namely Obtain...

Embodiment 3

[0062] On the basis of the foregoing examples, as a preference, the silane coupling agent is vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris(2-methoxyethoxy)silane, One or a mixture of γ-aminopropyltrimethoxysilane and γ-aminopropyltriethoxysilane.

[0063] Further, the main anti-wax agent is vinyl acetate-maleic anhydride-acrylamide terpolymer or higher alcohol polyacrylate; specifically, the vinyl acetate-maleic anhydride-acrylamide tripolymer The molar ratio of the monomers in the copolymer is vinyl acetate:maleic anhydride:acrylamide=1:(0.5~1):(0.3~0.5), and the molecular weight of the terpolymer is 2000-10000kDa; Higher alcohol polyacrylate is preferably tetradecyl polyacrylate, hexadecyl polyacrylate or octadecyl polyacrylate.

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

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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 paraffin control layer and a protective layer. The modified proppant inner core is ceramsite or quartz sand treated with a silane coupling agent; the solid paraffin control layer is composed of a main paraffin control agent, a dissolution rate control agent, a dispersing agent and a binding agent; and the main component of the protective layer is a degradable nano material. The proppant is added in theinitial stage of hydraulic fracturing sand adding and pumped to the deep part of an oil layer, and after the protective layer is dissolved in oil under the formation temperature condition, a paraffincontrol component is slowly released under the action of a dissolution rate control agent. The paraffin control component enters the deep part of the oil layer, so that the influence of seasons is avoided, the long-acting uniform release of the paraffin control component is realized, and the hydraulic fracturing proppant has the advantages of high paraffin control efficiency, long acting time, nolimitation of seasonal environment, simple construction operation, safety in use and easiness in popularization.

Description

technical field [0001] The invention belongs to the field of oil field development, and in particular relates to a hydraulic fracturing proppant, a preparation method and application. Background technique [0002] As the pressure and temperature continue to decrease during the production process, wax deposition in wellbore and pipelines of oil wells is common. Wax deposition will affect the normal fluid production of the oil well, and even wax stuck in the pipe string, wax blocking the surface pipeline and other phenomena will occur, which not only requires a lot of manpower, material resources, and financial resources for frequent well cleaning and pump inspection operations, but also directly affects oil well production. [0003] At present, the main technical means of oil well anti-wax include tubing lining and coating anti-wax, adding anti-wax inhibitor and magnetic anti-wax in oil well. Each method has its own characteristics and best applicable conditions. Among them,...

Claims

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Application Information

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Patent Type & Authority Applications(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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