Preparation method of lightweight and high-strength fracturing propping agent

A fracturing proppant, high-strength technology, applied in chemical instruments and methods, ceramic products, earthwork drilling and mining, etc., can solve problems such as high density of fracturing proppant, impact on oil and natural gas exploitation, and damage to fracturing equipment, to achieve Not easy to precipitate, reduce construction difficulty and cost, and reduce damage

Inactive Publication Date: 2017-05-24
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: aiming at the problem that the density of the traditional sintered ceramsite type fracturing proppant is too high, it is easy to cause damage to the fracturing equipment during use and affect the exploitation of oil and natural gas, and provides a silicic acid The white precipitate produced by the reaction of sodium and hydrochloric acid is the inner core, and the surface is covered with a layer of calcium hydroxyphosphate, and the aluminum hydroxide precipitate is produced by the reaction of aluminum nitrate with uric acid, ammonia water, etc., and mixed with carbon black, under the protection of argon Calcining, mixing with sodium carbonate solution, evaporating and crystallizing, calcining again, and finally washing and drying with water to obtain a light-weight high-strength fracturing proppant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Measure 150mL of sodium silicate solution with a mass fraction of 10%, pour it into a three-necked flask with a dropping funnel, and then place the three-necked flask in a digital speed measuring constant temperature magnetic stirrer at a temperature of 55°C and a speed of 300r / min Under certain conditions, add 120 mL of hydrochloric acid with a concentration of 2 mol / L to the three-necked flask through the dropping funnel, and control the dropping within 30 minutes. After mixing evenly with 280mL of 8% aluminum nitrate solution, pour it into a three-necked flask, then add 20g of urea, 30g of nano-calcium hydroxyphosphate, and 40mL of diethanolamine, and then place the three-necked flask in a digital speed measuring constant temperature magnetic stirrer , at a temperature of 65°C and a rotation speed of 400r / min, stir at a constant temperature for 15min, then add 400mL of ammonia water with a mass fraction of 15% into the three-necked flask through a dropping funnel, and...

example 2

[0019]Measure 180mL of sodium silicate solution with a mass fraction of 10%, pour it into a three-necked flask with a dropping funnel, and then place the three-necked flask in a digital speed measuring constant temperature magnetic stirrer at a temperature of 58°C and a speed of 400r / min Under certain conditions, add 140 mL of hydrochloric acid with a concentration of 2 mol / L to the three-necked flask through the dropping funnel, and control the dropping within 40 minutes. After mixing evenly with 320mL of 9% aluminum nitrate solution, pour it into a three-necked flask, then add 30g of urea, 35g of nano-calcium hydroxyphosphate, and 50mL of diethanolamine, and then place the three-necked flask in a magnetic stirrer with digital display speed measurement and constant temperature , at a temperature of 68°C and a rotation speed of 500r / min, stir at a constant temperature for 18min, then add 450mL of ammonia water with a mass fraction of 15% into the three-necked flask through a dr...

example 3

[0022] Measure 200mL of sodium silicate solution with a mass fraction of 10%, pour it into a three-necked flask with a dropping funnel, and then place the three-necked flask in a digital speed measuring constant temperature magnetic stirrer at a temperature of 60°C and a speed of 500r / min Under certain conditions, add 160 mL of hydrochloric acid with a concentration of 2 mol / L to the three-necked flask through the dropping funnel, and control the dropping within 45 minutes. After mixing evenly with 380mL of 10% aluminum nitrate solution, pour it into a three-necked flask, then add 40g of urea, 40g of nano-calcium hydroxyphosphate, and 60mL of diethanolamine, and then place the three-necked flask in a digital speed measuring constant temperature magnetic stirrer , at a temperature of 70°C and a rotation speed of 600r / min, stir at a constant temperature for 20min, then add 500mL of ammonia water with a mass fraction of 15% into a three-neck flask through a dropping funnel, and co...

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Abstract

The invention discloses a preparation method of a lightweight and high-strength fracturing propping agent, and belongs to the technical field of propping agent preparation. Silicon dioxide generated by calcination is taken as a kernel, hydroxyapatite and aluminum oxide generated by calcination coat the surface, one part of silicon dioxide reacts with carbon in a high-temperature state to generate silicon carbide and the other part of silicon dioxide reacts with sodium carbonate generated by evaporative crystallization at a high temperature to generate sodium silicate, and the sodium silicate is removed through washing and dissolving to form a hollow structure. Hollow microspheres formed by silicon carbide, aluminum oxide and hydroxyapatite are fully utilized to reach the lightweight and high-strength effects; the density of the lightweight and high-strength fracturing propping agent is reduced by over 10% in comparison with a conventional ceramsite fracturing propping agent; the problem that loss of fracturing equipment is easily caused by over-high density of the traditional ceramsite fracturing propping agent is effectively solved.

Description

technical field [0001] The invention discloses a preparation method of a lightweight high-strength fracturing proppant, which belongs to the technical field of proppant preparation. Background technique [0002] Fracturing proppant is a special material that is pumped into formation fractures together with fracturing fluid to support fractures and increase oil and gas conductivity during hydraulic fracturing in the oil and gas industry. Compared with quartz sand and resin-coated sand, ceramsite fracturing proppant has the characteristics of low fragmentation rate, corrosion resistance, good flow conductivity and high cost performance, and has been adopted by more and more oil fields. [0003] Since hydraulic fracturing was successfully tested in the United States in 1947, it has become a mature mining technology and has been widely used in oil and gas fields around the world. In the total cost of hydraulic fracturing, the cost of fracturing proppant accounts for a large pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C04B35/565C04B35/10C04B35/447C04B35/622C04B38/00
CPCC09K8/80C04B35/10C04B35/447C04B35/573C04B35/622C04B38/009C04B2235/3418C04B2235/424C04B2235/443C04B2235/77C04B2235/94C04B2235/96C09K2208/10C04B38/0067C04B38/0022
Inventor 皮蒙雷春生许博伟
Owner CHANGZHOU UNIV
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