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Ultra-low-density ceramic proppant taking pebbles as main additive and preparation method thereof

An ultra-low density, cobblestone technology, applied in the field of ultra-low density ceramsite proppant and its preparation, can solve the problems of high production cost, shortage of raw materials and high apparent density, and achieve the effects of low price, convenient procurement and convenient construction

Inactive Publication Date: 2012-09-19
渑池德惠石油支撑剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects of shortage of raw materials, high production cost and too high apparent density in the prior art, the object of the present invention is to provide an ultra-low density ceramsite proppant using cobblestone as the main additive and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, the raw materials of bauxite, cobblestone, potassium feldspar, calcite and magnesia are broken into particles smaller than 10mm, and then the ingredients are formulated according to mass percentage: 85% bauxite, 5% cobblestone, 5% potassium feldspar, and 4% calcite. %, magnesia 1%. After batching, add together (continuously add batching) ball mill to grind into a 325-mesh mixed powder with a sieve rate greater than 98%, and then put it into the granulation pot, spray (water mist, the same below) to granulate, and the particles are screened according to production needs Finally, it is dried until the moisture content is not higher than 5%, and then enters the rotary kiln, and is fired at 1300°C for 2 hours to become a finished product. After testing, the bulk density of the finished product is 1.39g / cm 3 , the apparent density is 2.60g / cm 3 , the breakage rate is 6.50% when the closing pressure is 40MPa. Other indicators are also in line with the national oil a...

Embodiment 2

[0019] First, the raw materials of bauxite, cobblestone, potassium feldspar, calcite and magnesia are broken into particles smaller than 10mm, and then the ingredients are formulated according to mass percentage: 85% bauxite, 10% cobblestone, 3% potassium feldspar, and 1 calcite %, magnesia 1%. After batching, add together (continuously add batching) ball mill to grind into a 325-mesh mixed powder with a sieve rate greater than 98%, and then put it into the granulation pot, spray granulation, the particles are screened according to production requirements, and dried to the moisture content Not higher than 5%, then enter the rotary kiln, and burn at 1320°C for 0.5h to become a finished product. After testing, the bulk density of the finished product is 1.36g / cm 3 , the apparent density is 2.56g / cm 3 , The breakage rate is 7.25% when the closing pressure is 40MPa. Other indicators are also in line with the national oil and gas SY / T 5108-2006 industry standards.

Embodiment 3

[0021] First, the raw materials of bauxite, cobblestone, potassium feldspar, calcite and magnesia are broken into particles smaller than 10mm, and then the ingredients are formulated according to mass percentage: 80% bauxite, 15% cobblestone, 2% potassium feldspar, and 1 calcite %, magnesia 2%. After batching, add together (continuously add batching) ball mill to grind into a 325-mesh mixed powder with a sieve rate greater than 98%, and then put it into the granulation pot, spray granulation, the particles are screened according to production requirements, and dried to the moisture content Not higher than 5%, and then enter the rotary kiln, at a temperature of 1340 ° C, after 1.5 hours to be fired into a finished product. After testing, the bulk density of the finished product is 1.37g / cm 3 , the apparent density is 2.57g / cm 3 , the breakage rate was 7.01% when the closing pressure was 40MPa. Other indicators are also in line with the national oil and gas SY / T 5108-2006 ind...

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Abstract

The invention belongs to the technical field of solid proppants for oil and gas well fracturing technologies and discloses an ultra-low-density ceramic proppant taking pebbles as a main additive and a preparation method thereof. The ultra-low-density ceramic proppant is prepared from the following raw materials in percentage by weight: 75-85% of alumyte, 5-20% of pebbles, 1-5% of potassium feldspar, 1-4% of calcite and 1-3% of magnesite. The preparation method comprises the following steps of: respectively crushing all the raw materials, then mixing according to the mixture ratio, performing spray granulation, and finally sintering for 0.5-2 hours at the temperature of 1300-1350 DEG C. According to the preparation method disclosed by the invention, the pebbles with extensive sources are selected as the main additive, so that the problem that the ultra-low-density ceramic proppants developed by most of manufacturers at present are too high in apparent density; and simultaneously, the potassium feldspar, the calcite and the magnesite are taken as sintering aids, the cost is lower than manganese mineral powder which is commonly used at present. More importantly, the ultra-low-density ceramic proppant produced by the preparation method disclosed by the invention can be conveniently constructed in an oil fracturing process, even realize clear water fracturing and greatly reduce oil production cost.

Description

technical field [0001] The invention belongs to the technical field of solid proppants for oil and gas well fracturing techniques, and in particular relates to an ultra-low-density ceramsite proppant using cobblestone as a main additive 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. At present, my country's petroleum industry generally sets the bulk density not greater than 1.40g / cm 3 , the apparent density is not more than 2.60g / cm 3 , The ceramsite proppant whose fracture rate is not more than 10% under the closing pressure of 40Mpa is called ultra-low density ceramsite proppant. When ultra-low density ceramsite proppant is used as oil well fracturing proppant to exploit crude oil, the amount of proppant is red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C04B35/10C04B35/622
Inventor 张希君刘腾孟晓钢
Owner 渑池德惠石油支撑剂有限公司