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A kind of self-suspending proppant and preparation method thereof

A proppant and self-suspension technology, applied in chemical instruments and methods, earth drilling, mining fluids, etc., can solve problems such as personnel, environmental hazards, and failure to meet fracturing, and achieve good shear resistance

Active Publication Date: 2018-08-07
GUANGHAN HUAXING NEW TECH DEV INST GENERAL PARTNERSHIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these existing self-suspending proppants involve organic solvents such as acetone, ethyl acetate, and methyl acetate in the implementation process, which will inevitably cause certain harm to personnel and the environment; and self-suspending proppants only combine polymers with The proppant matrix is ​​physically mixed and cannot meet the needs of fracturing

Method used

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  • A kind of self-suspending proppant and preparation method thereof
  • A kind of self-suspending proppant and preparation method thereof
  • A kind of self-suspending proppant and preparation method thereof

Examples

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preparation example Construction

[0026] The present invention provides a kind of preparation method of self-suspending proppant, comprises the following steps:

[0027] (1) mixing the preheated proppant matrix with the water-swellable polymer to obtain a mixture;

[0028] (2) Spray the silane coupling agent solution into the mixture obtained in the step (1) under stirring condition, and react at 60-80° C. for 3-4 hours to obtain the self-suspending proppant.

[0029] The present invention combines a preheated proppant matrix with a water-swellable polymer to produce a mixture. In the present invention, the mass ratio of the proppant matrix to the water-swellable polymer is preferably 1000:5-15, more preferably 1000:8-10.

[0030] In the present invention, the preheating of the support matrix can accelerate the reaction speed of the silane coupling agent on the surface of the proppant; in the present invention, the preheating temperature of the proppant matrix is ​​preferably 60-80°C, more preferably 65-80°C....

Embodiment 1

[0055] 1) Select 16 / 20 mesh (that is, pass through a 16 mesh screen and cannot pass through a 20 mesh screen) ceramic particles as the proppant matrix; select 100 to 200 mesh poly(meth)acrylic acid potassium salt as a water-swellable polymer; Choose silane coupling agent KH550, and configure it as a 10% silane coupling agent solution with distilled water.

[0056] 2) Add 1000g of 16 / 20 mesh ceramic particles into the rotary fluidized bed, heat the ceramic particles to 60°C, add 10g of poly(meth)acrylate potassium salt with a size of 100 mesh into the fluidized bed, stir evenly, and obtain Mixture; 30g mass fraction is that 10% silane coupling agent solution is sprayed in described mixture from the top of fluidized bed, after spraying finishes, ceramic particle, poly(meth)acrylic acid potassium salt and silane coupling agent solution are stirred and mixed After uniformity, the stirring was stopped, and the reaction was carried out at constant temperature for 3 hours under the e...

Embodiment 2

[0074] 1) Select 40 / 70 mesh (that is, pass through the 40 mesh screen and cannot pass through the 70 mesh screen) quartz sand as the proppant matrix; Polymer; choose silane coupling agent KH570, configure 20% silane coupling agent solution with distilled water.

[0075] 2) Add 1000g of 40 / 70 mesh quartz sand to the rotary fluidized bed, heat the quartz sand to 80°C, add 15g of 200 mesh cross-linked carboxymethyl cellulose grafted acrylamide into the fluidized bed, and stir Uniformly, obtain mixture; 50g mass fraction is that the silane coupling agent solution of 5% is sprayed in the described mixture from the top of fluidized bed, after spraying, quartz sand, cross-linked carboxymethyl cellulose graft acrylamide and silane After the coupling agent solution was stirred evenly, the stirring was stopped, and the temperature was maintained at 80° C. for 4 hours. After natural cooling, sieve to obtain.

[0076] Taking the self-suspending proppant prepared in Example 1 and Example...

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Abstract

The invention provides a preparation method of a self-suspension propping agent. The preparation method comprises the following steps: mixing a pre-heated propping agent matrix and a polymer capable of being swollen with water; in a stirring process, spraying a silane coupling agent solution into a mixture; and reacting for 3h to 4h at a temperature of 60 DEG C to 80 DEG C to obtain the self-suspension propping agent. According to the preparation method of the self-suspension propping agent, the silane coupling agent and the polymer capable of being swollen with the water are used for coating the propping agent matrix so that a cross-linking agent is realized; the silane coupling agent is connected with the propping agent matrix by adopting a siloxane chemical bond and is also subjected to a chemical reaction with the polymer to form a chemical bond; the self-suspension propping agent provided by the invention has a good anti-shearing capability and a great buoyant force; the self-suspension propping agent has long suspension time in clean water; a toxic organic solvent does not need to be added and a gel breaking performance is good; and gel breaking liquid has a relatively good anti-swelling performance and a strong crack backward flowing capability.

Description

technical field [0001] The invention relates to the field of fluid mineral mining, in particular to a self-suspension proppant and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the world economy, the demand for oil and natural gas in human society has been increasing, and conventional oil reserves have been decreasing, which can no longer meet the rapid growth of oil and gas demand. Therefore, people have turned their attention to low-permeability (tight) Oil and gas resources and unconventional oil and gas resources. Low permeability (tight) oil and gas resources and unconventional oil and gas resources will be the main targets of future oil and gas exploration and development in my country. It has been proven that hydraulic fracturing is an important technical means to improve the production capacity, development effect and benefit of low-permeability oil and gas reservoirs and unconventional oil and gas reservo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 方天成陈红军李宏宇欧阳冬王春明蒙柏成宁华明
Owner GUANGHAN HUAXING NEW TECH DEV INST GENERAL PARTNERSHIP
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