Preparation method of film covered supporting agent for fracturing

A technology of proppant and film covering, which is applied in the field of preparation of film covering proppant for fracturing, which can solve the problems of high friction in water-carrying sand pumping, achieve the effect of simple use method and avoid waste of resources

Active Publication Date: 2019-05-14
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a film-coated proppant for fracturing, and the prepared film-coated proppant for fracturing can solve the problem of high friction in water-carrying sand pumping

Method used

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  • Preparation method of film covered supporting agent for fracturing
  • Preparation method of film covered supporting agent for fracturing
  • Preparation method of film covered supporting agent for fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0037] Example 4, Example 5, and Comparative Example 7 were determined according to the following descriptions.

[0038] The proppant body in the embodiment can be a fracturing proppant purchased on the market, or a resin-coated proppant prepared by using aggregate, resin and curing agent. The resin used to prepare the resin-coated proppant can be epoxy resin. Any one of resin, phenolic resin, polyurethane resin, and acrylic resin. When the resin is epoxy resin, the corresponding curing agent is amines and acid anhydrides; when the resin is phenolic resin, the corresponding curing agent is urotropine. ; When the resin is made of polyurethane resin or acrylic resin, the corresponding curing agent is made of isocyanate.

[0039] The proppant body in the embodiment can also be a proppant body made of aggregate and a film layer wrapped outside the aggregate, and the film layer is prepared from resin, curing agent, catalyst and amine compound; The resin is a polyol resin (one or m...

Embodiment 1

[0041] This embodiment discloses a method for preparing a film-coated proppant for fracturing, which includes the following steps:

[0042] (1) Prepare the following raw materials: 740 parts of water, 70 parts of acrylamide, 80 parts of 2-acrylamido-2-methylpropanesulfonic acid, 30 parts of polyenylamine, and 80 parts of dimethyl diallyl ammonium chloride and 5 parts of initiator; among them, ammonium persulfate is selected as the initiator, and vinylamine is selected as the polyenamine. In this embodiment, the proppant body is made of the following raw materials in parts by mass: 100 parts of aggregate, 5 parts of resin and 2 parts of curing agent; wherein the aggregate is 30 / 50 quartz sand, the resin is phenolic resin, and the curing agent Use urotropine.

[0043] (2) Add water in the reactor and heat up to 70°C;

[0044] (3) Stir the materials in the reactor, add acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, vinylamine, dimethyl diallyl ammonium chloride to the r...

Embodiment 5

[0055] The difference between Example 5 and Example 1 is that in this example, the proppant body includes aggregate and a film layer wrapped outside the aggregate, and the film layer is prepared from resin, curing agent, catalyst and amine compound . The aggregate is 30 / 50 quartz sand, the resin is glycerol polymer, the curing agent is toluene diisocyanate, the catalyst is tributyltin, and the amine compound is diethylenetriamine. Among them, 100 parts of aggregate, 3 parts of resin, 2 parts of curing agent, 0.02 parts of catalyst, and 0.3 parts of amine compound;

[0056] The preparation process of the corresponding proppant body in step (6) is: heating the aggregate to 105°C, adding resin and catalyst, mixing and stirring; when the temperature drops to 95°C, adding amine compounds, stirring and mixing; when the temperature drops to 75°C, add the curing agent, mix and stir; the temperature drops to 50°C, take out the pot, and get the proppant body.

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Abstract

The invention belongs to the technical field of compositions for improving breaking effects, and specifically discloses a preparation method of a film covered supporting agent for fracturing. The method comprises the following steps: (1) preparing raw materials; (2) adding water to a reaction kettle, and increasing the temperature; (3) stirring; adding acrylamide, 2-acryloylamino-2-methallyl sulfonate, polyene amine and dimethyl diallyl ammonium chloride; and continuously stirring after adding the raw materials; (4) stirring when the temperature of the materials is maintained at 65-75 DEG C; adding an initiator; and continuously stirring for 4-7min; (5) reacting for 3.5-4.5h to obtain a drag reducer; and discharging when the drag reducing rate of the drag reducer is more than 25%; otherwise, adding a sodium hydroxide solution for adjusting; and (6) mixing the drag reducer and a supporting agent body on the basis of the mass ratio of 0.8-1.5 to 100; and covering the drag reducer on thesurface of the supporting agent body to obtain the film covered supporting agent for fracturing.

Description

technical field [0001] The invention belongs to the technical field of compositions for strengthening fracturing, and in particular relates to a preparation method of a film-coated proppant for fracturing. Background technique [0002] Fracturing proppant refers to the liquid additive that is brought into the fracture by fracturing fluid and used to support the fracture in the oil field after the pressure is released. This led to the collapse and leakage of drilling wells in the hole oil field. [0003] The ideal fracturing proppant for oil and gas wells requires high carrying capacity and high sand ratio, so it needs to have the lowest possible density and the highest possible strength. Traditional fracturing proppants include quartz sand, ceramsite and their coated products. The outer coating is cured at high temperature with phenolic or epoxy resin. The amount of curing agent is generally 5-50% of the resin. The membrane temperature is around 230 degrees. The traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C08F220/58C08F220/56C08F226/02C08G18/48C08G18/76
Inventor 熊帆熊鹰王正力
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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