Preparation method of high-volume fly ash ceramsite proppant

A technology with high content of fly ash ceramsite, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of broken rate, high acid solubility, narrow application range, etc., and achieve reduction Effects of resource consumption, consumption reduction, and cost reduction

Active Publication Date: 2014-05-21
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent 201210353045.8 discloses a low-density ceramsite proppant prepared by using fly ash and its preparation method, wherein the content of fly ash is 10% to 30%, and the product has a high breakage rate and acid solubility, and the scope of application is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of a high-volume fly ash ceramsite proppant, comprising the steps of:

[0022] 1) Mix 60% of bauxite, 32% of fly ash, 3% of calcite powder, 2% of titanium dioxide, and 3% of barite powder according to mass percentage to obtain raw materials;

[0023] 2) Put the raw materials in a ball mill, add high-alumina balls according to the ball-to-material ratio of 1:1, and after ball milling for 4 hours, take out a 300-mesh standard sieve to obtain a mixed powder with a particle size of less than 48 μm;

[0024] 3) The mixed powder is placed in a closed stirring mixer for granulation, and at the same time of granulation, an aqueous solution of sodium silicate with a mass concentration of 10% is added three times. 10% of the powder to obtain a ceramsite green body;

[0025] 4) Dry the ceramsite body in a rotary dryer at 80°C for 3 hours, then put it into a disc granulator for self-grinding and rounding, and then sieve it with a vibrating sieve to obtain a pa...

Embodiment 2

[0028] A preparation method of a high-volume fly ash ceramsite proppant, comprising the steps of:

[0029] 1) Mix 25% bauxite, 70% fly ash, 3% titanium dioxide and 2% barite powder evenly by mass percentage to obtain raw materials;

[0030] 2) Put the raw materials in a ball mill, add high-alumina balls according to the ball-to-material ratio of 1:1, and after ball milling for 2 hours, take out a 300-mesh standard sieve to obtain a mixed powder with a particle size of less than 48 μm;

[0031] 3) The mixed powder is placed in a closed stirring mixer for granulation, and at the same time of granulation, an aqueous solution of sodium silicate with a mass concentration of 10% is added three times. 23% of the powder to obtain a ceramsite green body;

[0032] 4) Dry the ceramsite body at 150°C for 2 hours, then put it into a disc granulator for self-grinding and rounding, and then sieve it with a vibrating sieve to obtain raw meal with a particle size distribution of 16-80 mesh b...

Embodiment 3

[0035] A preparation method of a high-volume fly ash ceramsite proppant, comprising the steps of:

[0036] 1) According to mass percentage, 30% bauxite, 50% F class II concrete fly ash, 2% titanium dioxide, 10% soft refractory clay, 5% talcum powder, 1% calcite powder, 2% barite powder is mixed evenly to obtain the raw material;

[0037] 2) Put the raw materials in a ball mill, add high-alumina balls according to the ball-to-material ratio of 1:1, and after ball milling for 2 hours, take out a 300-mesh standard sieve to obtain a mixed powder with a particle size of less than 48 μm;

[0038] 3) The mixed powder is placed in a closed stirring mixer for granulation, and at the same time of granulation, an aqueous sodium silicate solution with a mass concentration of 10% is added in four times, and the quality of the aqueous sodium silicate solution is the 16% of the mixed powder to obtain the ceramsite green body;

[0039] 4) Dry the ceramsite body at 120°C for 2.5 hours, then ...

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Abstract

The invention discloses a preparation method of a high-volume fly ash ceramsite proppant. The preparation method comprises the following steps: evenly mixing 20-65wt% of bauxite, 30-75wt% of fly ash, 0-5wt% of calcite powder, 0-10wt% of talcum powder, 1-5wt% of titanium dioxide, 0-20wt% of soft refractory clay and 1-5wt% of barite powder together to obtain the raw materials, putting the raw materials in a ball mill and then putting the ball mill in a closed stirring mixer for pelletizing, and adding a sodium silicate aqueous solution having the mass concentration of 10% a plurality of times while pelletizing to obtain a ceramsite blank, drying the ceramsite blank, next, carrying out autogenous grinding and rounding in a pelletizer and then sieving to obtain raw nodules, and then heating and firing the raw nodules and then cooling along with the furnace to obtain the high-volume fly ash ceramsite proppant. The fly ash replacement of the preparation method can be within the range from 30% to 75%, and the dosage of bauxite in the raw materials is obviously reduced without affecting the performance of the ceramsite proppant, so that the cost is greatly reduced and the resource consumption is reduced.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a preparation method of a high-volume fly ash ceramsite proppant. Background technique [0002] Fracturing technology plays a very important role in oil and gas exploitation worldwide, and fracturing proppant is the key to the success of fracturing technology. High-quality proppants can play an important role in the production of oil and gas wells. [0003] Ceramsite proppant is a kind of ceramic particle product, which has the advantages of uniform particle size, high compressive strength, good finish, strong flow conductivity and less impurity content. It is the preferred proppant material in low permeability oil and gas fields and deep well development. High-strength ceramsite fracturing proppant can increase crude oil and natural gas production by about 30%, and can extend the service life of oil and gas wells. [0004] At present, domestic ceramsite proppants mainly use hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C04B35/10C04B35/622
CPCC04B35/00C04B35/10C04B35/62204C09K8/80
Inventor 吴赟何志勇李洪俊石飞飞刘河牛增前党伟马洪芬蒙传幼谢建利谭建勇
Owner BC P INC CHINA NAT PETROLEUM CORP
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