A low-density high-strength ceramsite fracturing proppant and its preparation method

A fracturing proppant and high-strength technology, applied in chemical instruments and methods, earthwork drilling, and fluid production, can solve the problems of high apparent density and high sintering temperature of products, achieve simple production process, reduce sintering temperature, promote The effect of sintering

Active Publication Date: 2017-01-25
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength of this product is very high, but the sintering temperature of the product is high, and the apparent density of the product is high

Method used

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  • A low-density high-strength ceramsite fracturing proppant and its preparation method
  • A low-density high-strength ceramsite fracturing proppant and its preparation method
  • A low-density high-strength ceramsite fracturing proppant and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: A low-density and high-strength ceramsite fracturing proppant, the ceramsite fracturing proppant has a core material embryo, and the raw material requirements and proportions are shown in Tables 1 and 2, in weight percentage;

[0034] A gel breaker layer is arranged outside the body of the core material, and an outer coating is coated on the gel breaker layer, and a lubricant layer is coated on the outer coating;

[0035] Wherein, the components of the breaker layer are selected from enzymes, perborate, sodium bromate, or combinations thereof;

[0036] This external coating is divided into internal coating and external coating, and the component of described internal coating is selected from phenolic resin, urea-formaldehyde resin or polyvinylidene chloride; The component of described external coating is selected from melamine formaldehyde resin, Furfuryl alcohol resins or copolymers of these resins;

[0037] The lubricant layer includes graphite, molybde...

Embodiment 2

[0041] Example 2: The raw material composition is shown in Table 1. The production method is basically the same as in Example 1, except that the semi-finished product is pre-calcined at 300°C for 1 hour in a furnace, and then the furnace temperature is raised to 1200°C for 10 hours.

Embodiment 3

[0042] Embodiment 3: The raw material composition is shown in Table 1, and the production method is basically the same as that of Embodiment 1, except that the semi-finished product is pre-calcined at 300° C. for 1 hour in a furnace, and then the furnace temperature is raised to 1250° C. for 10 hours of calcination.

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Abstract

The invention relates to a low-density high-intensity ceramsite fracturing propping agent and a preparation method thereof. The low-density high-intensity ceramsite fracturing propping agent has a core material body which is composed of the following materials in percentage by weight: 30-40% of bauxite, 10-15% of talcum, 10-12 % of mullite, 12-15% of metakaolin, 6-15% of potassium feldspar, 3-6.5% of titanium dioxide, 1-3% of manganese powder, 3-4.5% of nano calcium carbonate, 2.5-3.5% of iron trioxide and 2.5-3.5% of magnesium orthosilicate; a gel breaker layer is arranged outside the core material body, and the gel breaker layer is sequentially coated with an external coating and a lubricant layer. When in preparation, various materials are firstly ball-milled, sieved and graded, and then matched in different ways; the potassium feldspar and the titanium dioxide both can reduce reaction temperature to a certain extent; the added manganese powder mainly plays a role in catalyzing; the nano calcium carbonate plays a role in reducing density of product; sintering temperature needed by the product is 1250 DEG C; the product is low in density, strong in anti-fracture capacity and high in sphericity; and meanwhile, the production technology is simple and easy to popularize and implement.

Description

technical field [0001] The invention relates to the field of petroleum proppants, in particular to a low-density, high-strength ceramsite fracturing proppant and a preparation method thereof. Background technique [0002] Ceramsite fracturing proppant is a kind of ceramic particle product with high fracturing strength. It is mainly used for downhole support in oil fields to increase oil and gas production, and plays a pivotal role in oil and natural gas exploitation. The ceramsite support material enters the formation along with the high-pressure solution to fill in the rock formation fissures, providing a high-permeability channel for the circulation of oil and gas, maintaining high conductivity, and increasing oil and gas production. my country's petroleum industry generally refers to proppants with a pressure bearing capacity of 69MPa and 86MPa as medium and high-strength ceramsite proppants. Anti-regurgitation proppants are required to have the advantages of high streng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 仝玉萍赵顺波陈爱玖韩爱红马军涛李克亮霍洪媛陈征周仲远王慧贤
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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