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Preparation method of composite petroleum fracturing propping agent

A fracturing proppant and oil technology, applied in the field of fracturing proppant, can solve the problems of low production cost, poor suspension performance and flow conductivity, small fracturing area, etc., and achieve strong fracture resistance, low production cost, Good compressive strength

Inactive Publication Date: 2017-03-15
CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: aiming at the defects of high density and high strength of fracturing proppant used at home and abroad, resulting in poor suspension performance and flow conductivity, high fracturing construction cost and small fracturing area, The invention provides a preparation method of a composite petroleum fracturing proppant. The invention selects bauxite, mullite, manganese dioxide, ferric oxide and dolomite respectively, ball mills and sieves to obtain a mixed powder, and mixes Mix the powder with sodium hexametaphosphate solution to obtain a suspension, add tetradecyltrimethylammonium bromide solution dropwise to the suspension, stir to obtain a mixed solution, add acid-modified vermiculite to the mixed solution, and aerate Ultrasonic oscillation is then performed, and after ultrasonic oscillation, the precipitate is obtained by centrifugation. After drying, it is placed in a kiln for sintering and calcined at a high temperature. After the calcined product is cooled with dry ice, a fracturing proppant can be obtained. Good strength, strong resistance to crushing, low density, low production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Select 50g of bauxite, 20g of mullite, 3g of manganese dioxide, 2g of ferric oxide, and 8g of dolomite, respectively, and add them into a ball mill for 4 hours of ball milling. After ball milling, sieve to obtain a mixed powder of 280 meshes, and set aside; Add 5g of tetradecyltrimethylammonium bromide into 100mL of deionized water, stir and mix until the solid dissolves to obtain tetradecyltrimethylammonium bromide solution, and add the above mixed powder in a mass fraction of 1:5 In 3% sodium hexametaphosphate solution, ultrasonically disperse for 10 minutes to obtain a suspension, slowly add tetradecyltrimethylammonium bromide solution dropwise to the suspension, control the rate of addition to be 8mL / min, and after the addition ends, within 60 Stir and mix at ℃ for 1 hour. After stirring, the mixed liquid is obtained and set aside; weigh 80g of vermiculite, grind and sieve to obtain 10 mesh particles, mix with 5% hydrochloric acid at a mass ratio of 1:10, stir and mi...

example 2

[0023] Select 55g of bauxite, 25g of mullite, 4g of manganese dioxide, 3g of ferric oxide, and 9g of dolomite, respectively, and add them into a ball mill for 5 hours of ball milling. After ball milling, sieve to obtain a mixed powder of 290 meshes, which is set aside; Add 8g of tetradecyltrimethylammonium bromide into 125mL of deionized water, stir and mix until the solid dissolves to obtain tetradecyltrimethylammonium bromide solution, and add the above mixed powder in a mass fraction of 1:5 In 3% sodium hexametaphosphate solution, ultrasonically disperse for 13 minutes to obtain a suspension, slowly add tetradecyltrimethylammonium bromide solution dropwise to the suspension, control the rate of addition to 9mL / min, and after the addition ends, the solution will Stir and mix at ℃ temperature for 2 hours. After stirring, the mixed liquid is obtained and set aside; weigh 90g of vermiculite, grind and sieve to obtain 15 mesh particles, mix with 5% hydrochloric acid at a mass rat...

example 3

[0026]Select 60g of bauxite, 30g of mullite, 5g of manganese dioxide, 4g of ferric oxide, and 10g of dolomite, respectively, and add them into a ball mill for 6 hours of ball milling. After ball milling, sieve to obtain a mixed powder of 300 meshes, and set aside; Add 10g of tetradecyltrimethylammonium bromide into 150mL of deionized water, stir and mix until the solid dissolves to obtain tetradecyltrimethylammonium bromide solution, add the above mixed powder in a mass fraction of 1:5 In 3% sodium hexametaphosphate solution, ultrasonically disperse for 15 minutes to obtain a suspension, slowly add tetradecyltrimethylammonium bromide solution dropwise to the suspension, control the rate of addition to 10mL / min, and after the addition ends, within 80 Stir and mix at ℃ temperature for 3 hours. After stirring, the mixed liquid is obtained and set aside; weigh 100g of vermiculite, grind and sieve to obtain 20 mesh particles, mix with 5% hydrochloric acid at a mass ratio of 1:10, st...

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Abstract

The invention discloses a preparation method of a composite petroleum fracturing propping agent, and belongs to the technical field of fracturing propping agents. The preparation method comprises the following steps: respectively selecting bauxite, mullite, manganese dioxide, ferric oxide and dolomite, carrying out ball milling, sieving the ball-milled materials to obtain mixed powder, mixing the mixed powder with a sodium hexametaphosphate solution to obtain a suspension, dropwise adding a tetradecyl trimethyl ammonium bromide solution, stirring the tetradecyl trimethyl ammonium bromide solution and the suspension to obtain a mixed solution, adding acid-modified vermiculite to the mixed solution, aerating the mixed solution, carrying out ultrasonic vibration, centrifuging the obtained solution to obtain a precipitate, drying the precipitate, carrying out high temperature calcining on the dried precipitate in a sintering kiln to obtain a calcined substance, and carrying out dry ice cooling to the fracturing propping agent. The fracturing propping agent prepared in the invention has the advantages of good compressive strength, high fragmentation resistance, low density and low production cost.

Description

technical field [0001] The invention discloses a preparation method of a composite petroleum fracturing proppant, belonging to the technical field of fracturing proppant. Background technique [0002] Petroleum proppant is also called petroleum fracturing proppant. During oil and gas deep well mining, high closure pressure and low permeability deposits are treated by fracturing to crack the oil-gas-bearing rock formations, and oil and gas are collected from the channels formed by the fractures. At this time, fluids need to be injected into the rock base to overcome formation fractures Intensive pressure creates cracks in the rock formations around the wellbore, forming a channel with high-level flow capability. In order to keep the cracks formed after fracturing open, oil and gas products can pass through smoothly. [0003] Currently commonly used proppants mainly include quartz sand, bauxite ceramsite sand and resin-coated composite particles. Quartz sand is widely used b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 高玉梅徐越
Owner CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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