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Preparation method of self-suspending propping agent

A proppant and curing agent technology, applied in chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of high density and poor suspension of fracturing proppant, reduce fracturing cost, stabilize The effect of good performance and cost reduction

Inactive Publication Date: 2019-02-26
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a self-suspending proppant to solve the problem that the fracturing proppant prepared by the traditional method has high density, poor suspension, and is not easily carried into the well

Method used

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  • Preparation method of self-suspending propping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A preparation method of a self-suspending proppant, comprising the following steps:

[0046] (1) Prepare the following raw materials in parts by mass: 100 parts of aggregate, 1.8 parts of outer layer resin, 2 parts of first resin, 0.8 parts of first curing agent, 1.3 parts of outer layer curing agent, 0.005 parts of outer layer catalyst, amines Compound 0.2 parts. Among them, the aggregate is 20 / 40 quartz sand, the outer layer resin is propanol polymer, the first resin is epoxy resin, the first curing agent is T31, the outer layer curing agent is isophorone diisocyanate, and the outer layer catalyst is selected Lead isooctanoate, and triethylamine is selected as the amine compound.

[0047] (2) After heating the aggregate to 140°C, put it into the sand mixer, add the first resin, stir, and the speed of the sand mixer is 50 rpm;

[0048] (3) The temperature drops to 110°C, add the first curing agent, stir, and the speed of the sand mixer is 50 rpm;

[0049] (4) The te...

Embodiment 2

[0054] A preparation method of a self-suspending proppant, comprising the following steps:

[0055] (1) Prepare the following raw materials in parts by mass: 100 parts of aggregate, 1 part of outer layer resin, 1 part of first resin, 0.6 part of first curing agent, 0.8 part of outer layer curing agent, 0.008 part of outer layer catalyst, amines Compound 0.3 parts. Among them, the aggregate is 30 / 50 quartz sand, the outer layer resin is glycerol polymer, the first resin is epoxy resin, the first curing agent is 113D, and the outer layer curing agent is methylene diphenyl diisocyanate. The layer catalyst is selected from tributyltin, and the amine compound is selected from ethylenediamine.

[0056] (2) Put the aggregate into the sand mixer after heating to 120°C, add the first resin, stir for 15 seconds, and the speed of the sand mixer is 55 rpm;

[0057] (3) When the temperature drops to 100°C, add the first curing agent, stir, and the speed of the sand mixer is 55 rpm;

[0...

Embodiment 3

[0063] A preparation method of a self-suspending proppant, comprising the following steps:

[0064] (1) Prepare the following raw materials in parts by mass: 100 parts of aggregate, 1.2 parts of outer layer resin, 1.5 parts of first resin, 0.5 parts of first curing agent, 0.8 parts of outer layer curing agent, 0.01 part of outer layer catalyst, amines Compound 0.3 parts. Among them, 40 / 70 quartz sand is used as the aggregate, ethylene glycol polymer is used as the outer layer resin, phenolic resin is used as the first resin, hexamethylenetetramine is used as the first curing agent, toluene diisocyanate is selected as the outer layer curing agent, and toluene diisocyanate is used as the outer layer curing agent. The catalyst is tributyltin, and the amine compound is triethylenetetramine.

[0065] (2) Put the aggregate into the sand mixer after heating to 150°C, add the first resin, stir, and the speed of the sand mixer is 60 rpm;

[0066] (3) The temperature drops to 130°C, a...

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Abstract

The invention belongs to the technical field of exploitation of fluid minerals such as petroleum, natural gas and shale gas, and particularly discloses a preparation method of a self-suspending propping agent, after soaking of the self-suspending propping agent with an organic solvent, the self-suspending propping agent is filtered, a filtered solution is taken for testing, and the content of isocyanate in the solution accounts for 0.1% or more; wherein the preparation method of the self-suspending propping agent comprises the following steps: (1) an aggregate, an inner membrane material and an outer membrane material are prepared, and the outer membrane material comprises outer-layer resin, an outer-layer catalyst and an outer-layer curing agent; (2) the aggregate is heated to 80-160 DEGC, the inner membrane material is added, stirring is performed, wherein the rotating speed of the stirring is 50-100 revolutions per minute; (3) the temperature is reduced to 55-110 DEG C, the outer-layer resin and the outer-layer catalyst are added, stirring is performed, wherein the rotating speed of the stirring is 50-100 revolutions per minute; and (4) the temperature is reduced to 40-90 DEG C, the outer-layer curing agent is added, and stirring is performed, wherein the rotating speed of the stirring is 50-100 revolutions per minute, the temperature is reduced to 30-60 DEG C, and the mixture is discharged out of a pot. The method is mainly used for preparing the self-suspension propping agent, and solves the problem that pure clear water cannot be used as a sand-carrying liquid for fracturing construction.

Description

technical field [0001] The invention belongs to the technical field of fluid mineral exploitation such as oil, natural gas and shale gas, and in particular relates to a preparation method of a self-suspending proppant. Background technique [0002] In order to develop deep oil and gas wells and increase production, hydraulic fracturing technology is widely used. Hydraulic fracturing technology is a technology that uses high-pressure pumps on the ground to continuously inject high-viscosity fracturing fluid into the oil well through the wellbore to form a high pressure in the lower part of the oil well. With the continuous injection of fracturing fluid, the pressure also continues to rise. When the tensile strength and formation stress of the formation rock near the wellbore wall are less than the pressure formed by the fracturing fluid, fractures will occur in the formation near the bottom of the well. When the fracturing fluid carrying proppant continues to be injected, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 熊帆熊鹰王正力陈秋庆
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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