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A proppant for hydraulic fracturing of coalbed methane and shale gas and its preparation method

A hydraulic fracturing and proppant technology, which is used in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems that the upper part cannot be effectively filled, the density of proppant is high, etc., and improve the sand-carrying capacity. , the effect of increasing the filling volume and improving the flow conductivity

Inactive Publication Date: 2016-03-23
BEIJING AOTAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a proppant for hydraulic fracturing of coalbed methane and shale gas and its preparation method, to solve the problem of high proppant density in the prior art, and the distant cracks and the upper half of the cracks are uniform. The problem of not being able to get an effective filling

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  • A proppant for hydraulic fracturing of coalbed methane and shale gas and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation steps of proppant used in coalbed methane and shale gas hydraulic fracturing are as follows:

[0046] 1) Crush the bauxite into 200-300 mesh uniform particles, add water and manganese dioxide powder to the above uniform particles according to the weight ratio of bauxite, water, manganese dioxide and resin at 39:60:0.5:0.5 , resin, stirred to a liquid mixture; using a high-pressure plunger pump with a plunger pump nozzle inner diameter of 20-40 mesh to spray the liquid mixture onto a drying tower with a height of 20 meters, and dry it at 800 ° C , forming 20-40 mesh hollow ceramsite;

[0047] 2) Put the hollow ceramsite prepared in step 1) into a rotary kiln, sinter at 1300°C for 4 hours, and then cool to obtain 20-40 mesh high-strength hollow ceramsite;

[0048] 3) Put the 20-40 mesh high-strength hollow ceramsite prepared in step 2) into 10% ethanol solution of phenolic resin and soak for 24 hours. The hollow ceramsite soaked in the ethanol solution i...

Embodiment 2

[0053] 1) Crush bauxite into 300-400 mesh uniform particles, add water and manganese dioxide powder to the above uniform particles according to the weight ratio of bauxite, water, manganese dioxide and resin at 39:60:0.5:0.5 , resin, stirred to a liquid mixture; using a high-pressure plunger pump with a plunger pump nozzle inner diameter of 20-30 mesh, spray the liquid mixture onto a drying tower with a height of 20 meters, and dry it at 1000 ° C , forming 20-30 mesh hollow ceramsite;

[0054] 2) Put the hollow ceramsite prepared in step 1) into a rotary kiln, sinter at 1500°C for 5 hours, and then cool to obtain 20-30 mesh high-strength hollow ceramsite;

[0055] 3) Put the 20-30 mesh high-strength hollow ceramsite prepared in step 2) into 15% ethanol solution of phenolic resin and soak for 18 hours. The hollow ceramsite soaked in the ethanol solution is put into the curing equipment with a stirring mechanism for the first curing, the curing temperature is 100°C, and the cur...

Embodiment 3

[0060] 1) Crush bauxite into 300-400 mesh uniform particles, add water, manganese dioxide powder, and resin to the above uniform particles, and stir until a liquid mixture; use a plunger pump nozzle with a high-pressure plunger with an inner diameter of 30-40 mesh The pump sprays the liquid mixture onto a drying tower with a height of 20 meters, and dries at 900°C to form 30-40 mesh hollow ceramsite;

[0061] 2) Put the hollow ceramsite prepared in step 1) into a rotary kiln, sinter at 1200°C for 5 hours, and then cool to obtain 30-40 mesh high-strength hollow ceramsite;

[0062] 3) Put the 30-40 mesh high-strength hollow ceramsite prepared in step 2) into 20% ethanol solution of phenolic resin and soak for 15 hours. The hollow ceramsite soaked in the ethanol solution is put into the curing equipment with a stirring mechanism for the first curing, the curing temperature is 60°C, and the curing time is 3 hours;

[0063] 4) After the first curing, raise the temperature of the c...

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Abstract

The invention discloses a proppant for hydraulic fracturing of coal bed gas and methane shale gas and a preparation method thereof, in order to solve the problems that proppant in the prior art is in density of proppant and fails to effectively fill a fracture far away and the upper half part of the fracture. The preparation method comprises the following steps: preparing hollow ceramsite: grinding bauxite which is taken as a raw material into uniform granule granules of 200-400 meshes, adding water, manganese dioxide and resin, stirring to obtain a liquid mixture, drying the liquid mixture at 500-1000 DEG C, and cooling to obtain the hollow ceramsite; sintering the hollow ceramsite for 2-6 hours at 900-1500 DEG C; and coating the sintered hollow ceramsite by resin for at least once to obtain the proppant. The proppant is high in strength and low in density, and can be used for greatly improving the sand carrying capacity of fracturing fluid, increasing the filling volume of fracturing proppant, enhancing the fracturing effect, and enhancing the flow conductivity by 3-4 times.

Description

technical field [0001] The invention relates to the technical field of coalbed methane, shale gas and other unconventional resources exploited by hydraulic fracturing, in particular to a proppant that can be used for hydraulic fracturing of coalbed methane and shale gas and a preparation method thereof. The proppant has high strength and low density, which enhances the effect of fracturing and improves the flow conductivity. Background technique [0002] Coalbed methane is unconventional natural gas stored in coal seams in an adsorbed state, commonly known as "gas". Its main component is methane, and its calorific value is 2-5 times that of common coal. Shale gas is natural gas extracted from shale formations. The storage space is dominated by fractures and occurs in the form of adsorbed gas and water-soluble gas. It is also an important unconventional natural gas resource. [0003] The important extraction methods of coalbed methane and shale gas include drilling and hydra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80C04B35/10C04B35/622
Inventor 侯风岗安珂郑建锋
Owner BEIJING AOTAO SCI & TECH
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