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Low-density ceramsite propping agent taking low-aluminum high-silicon alumyte as major raw material and preparation method thereof

A bauxite, low-density technology, applied in the direction of earthwork drilling, mining fluid, wellbore/well parts, etc., can solve the problems of insufficient raw materials and high production costs of low-density ceramsite proppant, and achieve simple and convenient production process , low price, and reduced visual density index

Active Publication Date: 2014-01-08
垣曲县方圆陶粒砂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of utilization of low-alumina and high-silicon bauxite, and also to solve the problem of insufficient raw materials and high production costs of low-density ceramsite proppant, the purpose of the present invention is to provide a low-alumina and high-silicon bauxite Low-density ceramsite proppant with ore as main raw material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Firstly, the raw materials of bauxite, manganese ore, hematite, clay and dolomite are broken into particles smaller than 10mm, and then the ingredients are prepared according to mass percentage: 90% of bauxite, 4% of manganese ore, 2% of hematite, Clay 2%, dolomite 2%. After the ingredients are added together (continuous addition of ingredients), the ball mill is ground into a mixed powder with a 325-mesh sieve rate of more than 99%, and then put into the granulation pot, and the granules are granulated under the action of spray (water mist, the same below), and the granules are screened. , dried to a moisture content of no more than 5%, and then put into a rotary kiln and fired at 1320°C for 0.5h to obtain the low-density ceramsite proppant. After testing, the bulk density of the finished product is 1.52g / cm 3 , the apparent density is 2.70g / cm 3 , the breakage rate is 5.68% when the closing pressure is 52MPa. Other indicators are also in line with the national oil ...

Embodiment 2

[0021] First, the raw materials of bauxite, manganese ore, hematite, clay and dolomite are broken into particles smaller than 10mm, and then the ingredients are prepared according to mass percentage: 92% of bauxite, 3% of manganese ore, 2% of hematite, Clay 1%, dolomite 2%. After batching, add together (continuously add batching) ball mill to grind into 325 mesh sieve rate of more than 99% of the mixed powder, then put it into the granulation pot, granulate under the action of spraying, after the granules are screened, dry until the moisture content is not 5%, and then into the rotary kiln, fired at 1340 ° C for 1 hour to obtain the low-density ceramsite proppant. After testing, the bulk density of the finished product is 1.50g / cm 3 , the apparent density is 2.65g / cm 3 , The breakage rate is 5.80% when the closing pressure is 52MPa. Other indicators are also in line with the national oil and gas SY / T 5108-2006 industry standards.

Embodiment 3

[0023] First, the raw materials of bauxite, manganese ore, hematite, clay and dolomite are broken into particles smaller than 10mm, and then the ingredients are prepared according to the mass percentage: 94% of bauxite, 2.5% of manganese ore, 1.5% of hematite, Clay 0%, dolomite 2%. After batching, add together (continuous batching is added continuously) to crush each raw material into particles smaller than 10mm, weigh them in proportion, and use a ball mill to grind them into a mixed powder with a 325-mesh sieve rate greater than 99%, and then put it into the granulation pot. The granules are granulated under the action of spraying. After the granules are screened, they are dried until the moisture content is not more than 5%, and then enter the rotary kiln, and are fired at 1360°C for 1.5 hours to obtain the low-density ceramsite proppant. After testing, the bulk density of the finished product is 1.54g / cm 3 , the apparent density is 2.73g / cm 3 , The breakage rate is 5.75%...

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Abstract

The invention belongs to the technical field of solid propping agents for an oil / gas well fracturing technology, and discloses a low-density ceramsite propping agent taking low-aluminum high-silicon alumyte as a major raw material and a preparation method thereof. The low-density ceramsite propping agent is prepared from the following raw materials in percentage by mass: 90-96 percent of alumyte, 1-4 percent of manganese ore, 0.5-2 percent of hematite, 0-2 percent of clay and 0-2 percent of dolomite, wherein the alumyte is low-aluminum high-silicon alumyte; the mass percent of Al2O3 is 50-60 percent; and the mass percent of SiO2 is 12 percent. The method comprises the following steps of: smashing raw materials respectively; mixing according to a certain mixture ratio, grinding, and performing spray granulation; and sintering at the temperature of 1,320-1,380 DEG C for 0.5-2.5 hours. Crude low-aluminum high-silicon alumyte is adopted, so that the problem of supply tension of raw materials is solved, the production cost of alumyte is reduced by about 350 yuan / ton in comparison to alumyte of which the alumina content is over 65 percent, and the propping agent has a wide development prospect; and moreover, the bulk density and apparent density indexes of the ceramsite propping agent are reduced remarkably, and the cost of well fracturing is reduced simultaneously.

Description

technical field [0001] The invention belongs to the technical field of solid proppant for oil and gas well fracturing technology, and in particular relates to a low-density ceramsite proppant using low-alumina and high-silicon bauxite as a main raw material and a preparation method thereof. Background technique [0002] In the fracturing process of oil and natural gas deep well exploitation, fracturing proppants are used to provide high-permeability channels for the circulation of oil and gas flows, maintain high conductivity, and increase oil and gas production. In my country's petroleum industry, the bulk density is generally not greater than 1.65g / cm 3 , the apparent density is not more than 3.00g / cm 3 , when the closure pressure is 52Mpa, the ceramsite proppant with a fracture rate of no more than 9.0% is called a low-density ceramsite proppant. When low-density ceramsite proppant is used as oil well fracturing to extract crude oil, it has the characteristics of less c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
Inventor 张希君
Owner 垣曲县方圆陶粒砂有限责任公司
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