Preparation method of novel fracturing propping agent-polymer sand

A technology of polymer and proppant, which is applied in drilling compositions, chemical instruments and methods, earthwork drilling and mining, etc. It can solve the problems of low temperature resistance, low strength and complicated preparation process, and achieve high compressive strength, The preparation process is simple and the temperature resistance is good

Inactive Publication Date: 2020-01-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to prepare a new type of organic proppant, which has the advantages of both organic and inorganic proppants, overcomes the defects of low temperature resistance and strength of organic proppants and complicated preparation process in the prior art, and provides a A kind of preparation method of high-strength, heat-resistant, unbreakable organic proppant polymer sand

Method used

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  • Preparation method of novel fracturing propping agent-polymer sand
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  • Preparation method of novel fracturing propping agent-polymer sand

Examples

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Embodiment 1

[0034] Add 2000mL of deionized water, 2.0g of tricalcium phosphate, and 2.0g of gelatin into a 5L reactor, and heat to 60°C while stirring. Add a mixture of 780.0g styrene, 220.0g divinylbenzene, 3.0g dibenzoyl peroxide, and 15.0g glycidyl methacrylate into the reactor, adjust the stirring rate to 120 rpm, and program the temperature to React at 75°C to 95°C for 8 hours. After the reaction, the materials were taken out, vacuum filtered, rinsed with deionized water for 3 times to obtain white microspheres, and the water was dried. Put the microspheres in a vacuum oven, raise the temperature to 195°C, keep the temperature for 60 minutes, and then cool to room temperature to obtain the polymer sand proppant.

Embodiment 2

[0036]Add 2000mL of deionized water, 1.5g of tricalcium phosphate, and 2.0g of polyvinyl alcohol into a 5L reactor, and heat to 60°C while stirring. Add 800.0g styrene, 200.0g divinylbenzene, 1.0g benzocyclobutene peroxide, 2.0g dibenzoyl peroxide, 10.0g glycidyl methacrylate and 10.0g glycidyl acrylate mixture In the reaction kettle, the stirring rate was adjusted to 115 rpm, and the temperature was programmed to rise to 75°C-95°C for 7 hours. After the reaction, the materials were taken out, vacuum filtered, rinsed with deionized water for 3 times to obtain white microspheres, and the water was dried. Put the microspheres in a vacuum oven, raise the temperature to 185°C, keep the temperature for 90 minutes, and then cool to room temperature to obtain the polymer sand proppant.

Embodiment 3

[0038] Add 2000mL of deionized water, 2.2g of talc powder, and 2.0g of polyvinyl alcohol into a 5L reactor, and heat to 60°C while stirring. Add a mixture of 750.0g styrene, 250.0g divinylbenzene, 2.2g dibenzoyl peroxide and 10.0g glycidyl acrylate into the reaction kettle, adjust the stirring rate to 120 rpm, and program the temperature to 75°C Reaction at ~95°C for 8h. After the reaction, the materials were taken out, vacuum filtered, rinsed with deionized water for 3 times to obtain white microspheres, and the water was dried. Put the microspheres in a vacuum oven, raise the temperature to 195°C, keep it warm for 50 minutes, and then cool down to room temperature to obtain a polymer sand proppant.

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Abstract

The invention provides a preparation technology of novel fracturing propping agent-polymer sand. The preparation method comprises the following steps: 1) adding styrene, divinyl benzene, a latent active monomer and an initiator into water filled with an organic/inorganic dispersant, stirring the components, heating the mixture to 70-100 DEG C, carrying out suspension polymerization reaction for 4-12 hours, and filtering, washing and drying a reaction product to obtain an intermediate product polymer microsphere; and 2) carrying out a thermal cross-linking reaction for 10-120 min at a temperature of 180-230 DEG C. The organic proppant polymer sand has the characteristics that 1) the organic proppant polymer sand is high in compressive strength at high temperature, good in temperature resistance and not easy to break; 2) a flexible latent active monomer is introduced into a molecular chain to improve the toughness and crosslinking degree of the product and reduce the dosage of a crosslinking agent, and 3) the product not only has the advantages of simple preparation and use of an organic proppant, but also has the characteristics of high temperature resistance and high strength of aninorganic proppant, and obviously improves the flow conductivity of fracturing exploitation of oil and gas fields.

Description

technical field [0001] The invention belongs to the technical field of fracturing and exploitation in oil and gas fields, and in particular relates to a preparation method of a novel organic fracturing proppant-polymer sand. Background technique [0002] Fracturing proppant is a kind of granular product, which is mainly used to support underground fractures after fracturing during oil and gas fracturing exploitation. Therefore, fracturing proppant needs to have good heat resistance and high compressive strength. When mining oil and gas by fracturing, the ore bed is cracked after fracturing, and the fracturing proppant and aqueous solution are injected into the rock formation at high pressure to fill the cracks, and the supporting cracks will not be closed due to stress release, keeping the channel unblocked, and oil and gas from the cracks come together in the formed channel. Proppants with good performance can improve conductivity, increase production, and extend the servi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 姚明刘凯姜志国
Owner BEIJING UNIV OF CHEM TECH
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