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Fracturing fluid thickening agent and preparation method thereof

A technology of thickening agent and fracturing fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as no good solutions, and achieve strong anti-degradation characteristics, strong stability, strong rigidity and The effect of salt resistance

Active Publication Date: 2021-10-29
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although Fe has been identified in the prior art 2+ Effect on polymer viscosity, but no good solution yet

Method used

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  • Fracturing fluid thickening agent and preparation method thereof
  • Fracturing fluid thickening agent and preparation method thereof
  • Fracturing fluid thickening agent and preparation method thereof

Examples

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preparation example Construction

[0032] The present invention provides a kind of preparation method of fracturing fluid thickener in the first aspect, described method uses acrylamide as raw material, and comprises the following steps:

[0033] (1) Preparation of internal water-based phase

[0034] Using acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, strength monomers, self-assembly monomers, stabilizers and water as raw materials, the inner water-based phase is prepared;

[0035] (2) Preparation of oil-based phase

[0036] Using white oil, emulsifier and film-forming aid as raw materials, the oil-based phase is prepared:

[0037] (3) Preparation of internal phase emulsion polymerization product

[0038] Add the internal water-based phase, oil-based phase and oxidizing agent in sequence to the mixing tank, stir and mix evenly, then transfer to the reaction tank, pass nitrogen gas to remove oxygen, and then add an initiating amount of the first reducing agent to initiate the polymerization reaction to ...

Embodiment 1

[0076] This embodiment prepares a fracturing fluid thickener, the amount of raw materials is in parts by weight, and the preparation method includes the following steps:

[0077] (1) Preparation of the inner water-based phase:

[0078] The internal water-based phase is prepared from the following raw materials in parts by weight: 10 parts by weight of acrylamide, 100 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, and 200 parts by weight of sodium 4-acryloylbenzenesulfonate as a strength monomer Parts, 1 part by weight of perfluorooctyl ethyl methacrylate (purchased from Shangfluorine Technology, the same below) as self-assembled monomer, 5 parts by weight of citric acid as stabilizer, used to regulate the hydrogenation of pH value 19 parts by weight of sodium, and 200 parts by weight of water. The preparation process is as follows: Add acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, sodium 4-acryloylbenzenesulfonate, perfluorooctylethyl methacrylate, cit...

Embodiment 2

[0090] This embodiment prepares a fracturing fluid thickener, the amount of raw materials is in parts by weight, and the preparation method includes the following steps:

[0091] (1) Preparation of the inner water-based phase:

[0092] The internal water-based phase is prepared from the following raw materials in parts by weight: 25 parts by weight of acrylamide, 150 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid, 250 parts by weight of methacrylamide ethyl ethylene urea as a strength monomer Parts by weight, 2 parts by weight of 2-(perfluorohexyl) ethyl methacrylate as a self-assembled monomer, 7 parts by weight of citric acid as a stabilizer, 28 parts by weight of sodium hydroxide for adjusting the pH value, water 250 parts by weight. The preparation process is as follows: Add acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, methacrylamide ethyl ethylene urea, 2-(perfluorohexyl) ethyl methacrylic acid in sequence in the mixing tank Esters, citric acid a...

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Abstract

The invention relates to the technical field of oil-gas field development, in particular to a fracturing fluid thickening agent and a preparation method thereof. The method comprises the following steps: preparing an inner water-based phase and an oil-based phase, emulsifying and polymerizing, preparing an outer water-based phase, emulsifying and polymerizing, and post-treating. A reverse-phase polymerization process and an internal and external two-phase polymerization mode are adopted, a high-salt-resistance self-assembly polymer is firstly prepared, then a macromolecular monomer is grafted through a chain extender, a molecular structure with extremely high rigidity is formed, the degradation influence of ferrous ions on the thickening agent during use is reduced through aftertreatment, the prepared supramolecular structure enables the polymer not only to have high salt resistance, but also to have relatively strong free radical resistance, so that the polymer has extremely strong degradation resistance.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a fracturing fluid thickener and a preparation method thereof. Background technique [0002] With the rapid development of the petroleum industry, most oilfields in my country have gradually entered the middle and late stages of oil exploitation. In order to achieve a higher production stimulation effect, fracturing stimulation measures are usually adopted. The discharge of oily sewage has increased significantly, making the supply of clean water gradually insufficient. In order to save fresh water injection and reduce sewage discharge, major oil fields generally adopt the fracturing process mixed with reinjection water. The salinity, bacteria content, dissolved oxygen, and reducing ions of the reinjected water will all cause the viscosity of the polymer solution to decrease. Among them, the reducing Fe 2+ Ions can greatly reduce the viscosity of polymer s...

Claims

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Application Information

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IPC IPC(8): C08F216/36C08F220/58C08F220/56C08F220/24C08F230/08C08F222/20C08F2/42C08F2/38C08F220/60C08F228/02C09K8/68C09K8/88
CPCC08F216/36C08F220/603C08F228/02C08F2/42C08F2/38C09K8/68C09K8/882C08F220/585C08F220/56C08F220/24C08F230/085C08F222/102
Inventor 荣敏杰孙建波许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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