Method for preparing proppant

A technology of proppant and walnut shell, which is applied in the direction of earthwork drilling, mining fluid, wellbore/well parts, etc., can solve the problems of high cost, high price, serious environmental pollution, etc., and achieve good compressibility and toughness, and make The effect of low cost and simple process steps

Inactive Publication Date: 2010-06-16
BEIJING RECHSAND SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The modifiers used in this method include organic solvents such as ethanol and acetone. The use of organic solvents as modifiers has the disadvantages of high price, high cost and serious environmental pollution. In addition, the above modifiers are mainly used to improve the resistance of particles. Deformability, but has no effect on enhancing the bonding force between walnut shells and polymer resins, that is, preventing polymer resins from peeling off from the surface of walnut shells, and further improving its resistance to crushing

Method used

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  • Method for preparing proppant

Examples

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Embodiment 1

[0017] Take 3 kg of crushed and granulated walnut shell particles of 20-40 mesh, add 6 kg of 1% sodium hydroxide solution, heat at 60°C for 3 hours, filter, wash with water, and dry at 45°C After 8 hours, the modified walnut shell was obtained. The modified walnut shell is heated and mixed with 0.03 kg of phenolic resin and 0.06 kg of hexamethylenetetramine, so that the phenolic resin is coated on the surface of the walnut shell particles, and the above solid mixture is cooled, crushed and sieved to obtain Finished proppant. Its properties are shown in Table 1.

[0018] In this embodiment, hexamethylenetetramine is the curing agent, and the following embodiments are the same.

Embodiment 2

[0020] Take 3 kg of crushed and granulated 20-40 mesh walnut shell particles, add it to 30 kg of 5% sodium hydroxide solution, heat at 40°C for 5 hours, filter, wash with water, and dry at 30°C After 10 hours, the modified walnut shell was obtained. The modified walnut shell is heated and mixed with 0.12 kg of phenolic resin and 0.006 kg of hexamethylenetetramine, so that the phenolic resin is coated on the surface of the walnut shell particles, and the above solid mixture is crushed and sieved to obtain the finished support agent. Its properties are shown in Table 1.

Embodiment 3

[0022] Take 3 kg of crushed and granulated 20-40 mesh walnut shell particles, add 15 kg of 3% potassium hydroxide solution, heat at 50°C for 3 hours, filter, wash with water, and dry at 30°C After 10 hours, the modified walnut shell was obtained. The modified walnut shell is heated, mixed and stirred with 0.06 kg of phenolic resin and 0.006 kg of hexamethylenetetramine, so that the phenolic resin is coated on the surface of the walnut shell particles, and the above solid mixture is cooled, crushed and sieved That is, the finished proppant is obtained. Its properties are shown in Table 1.

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Abstract

The invention relates to a method for preparing a proppant in a hydraulic fracturing technique. The proppant uses walnut shells as an aggregate. The method comprises the following steps: firstly, soaking the walnut shells with alkaline solution; secondly, washing and drying the walnut shells; thirdly, mixing the walnut shells with resin and a solidifying agent; and finally, heating, crushing and screening the mixture to obtain the proppant. The method adopts alkali as a modifying agent, and the walnut shells after being modified are activated, and interact with a resin layer by chemical bonds, so the resin layer of the proppant prepared by the method is firmly bonded with the surfaces of the walnut shells, cannot be peeled off from the walnut shells easily and reduces the breakage rate, and the proppant has good anti-breakage capacity.

Description

technical field [0001] The invention relates to a preparation method of a proppant used in hydraulic fracturing technology for exploration and development of oil and gas fields, in particular to a preparation method of a resin-coated proppant. Background technique [0002] In the process of exploration and development of oil and gas fields, hydraulic fracturing technology has become the main means of increasing production and improving recovery. At present, hydraulic fracturing technology has been widely used in the exploration and development of various oil and gas fields, and has become the main measure for oil and gas fields to increase production. Proppant is a key material in hydraulic fracturing technology, and the improvement of its performance is the key to improving the success rate of fracturing and greatly improving the stimulation effect. [0003] Commonly used proppants are divided into two categories: natural and artificial. The former is represented by quartz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
Inventor 秦升益
Owner BEIJING RECHSAND SCI & TECH GRP
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