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A linear glue thickener for oil well fracturing and preparation method thereof

A thickener and linear adhesive technology, which is used in the preparation of thickeners and linear adhesive thickeners for oil well fracturing, can solve the problems of poor temperature and shear stability, and improve the temperature and shear resistance and Salt performance, obvious thickening effect, good temperature and shear resistance

Active Publication Date: 2017-10-20
陕西森瑞石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthetic polymer thickeners are mainly polyacrylamides. Polyacrylamides can form water-based gel fracturing fluids by reacting with metal crosslinking agents such as organic titanium and zirconium. However, this type of traditional synthetic polymer fracturing fluids has disadvantages is temperature and shear stability poor

Method used

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  • A linear glue thickener for oil well fracturing and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 10 parts by weight of acrylamide and 5 parts by weight of itaconic acid into a four-necked flask, then add deionized water, stir to make it fully dissolve, and then add 4 parts by weight of pyrrolidone to continue stirring Dissolve, and heat the reaction mixture liquid to 30°C while stirring, then add the initiator to carry out the polymerization reaction. The initiator is a compound of potassium persulfate and sodium sulfite, and the amount of the initiator accounts for 0.1% of the total amount of polymerized monomers, wherein potassium persulfate: sodium sulfite=1:1.5 (mass ratio). The polymerization temperature is 30°C, and the polymerization time is 8 hours. After the polymerization reaction, the initial product is concentrated by rotary evaporation, and then cut into pieces, dried, crushed, and sieved to obtain a white powdery thickener.

Embodiment 2

[0027] Add 10 parts by weight of acrylamide and 6 parts by weight of itaconic acid into a four-necked flask, then add deionized water, stir to make it fully dissolve, and then add 5 parts by weight of pyrrolidone to continue stirring Dissolve, and heat the reaction mixture liquid to 40°C while stirring, then add the initiator to carry out the polymerization reaction. The initiator is a compound of potassium persulfate and sodium sulfite, and the amount of the initiator accounts for 0.08% of the total amount of polymerized monomers, wherein potassium persulfate: sodium sulfite=1:1.5 (mass ratio). The polymerization temperature is 40°C, and the polymerization time is 10 hours. After the polymerization reaction, the initial product is concentrated by rotary evaporation, and then cut into pieces, dried, crushed, and sieved to obtain a white powdery thickener.

Embodiment 3

[0029] Add 14 parts by weight of acrylamide and 8 parts by weight of itaconic acid into a four-necked flask, then add deionized water, stir to make it fully dissolve, and then add 6 parts by weight of pyrrolidone to continue stirring Dissolve, and heat the liquid reaction mixture to 45°C while stirring, then add the initiator to carry out the polymerization reaction. The initiator is a compound of potassium persulfate and sodium sulfite, and the amount of the initiator accounts for 0.12% of the total amount of polymerized monomers, wherein potassium persulfate: sodium sulfite=1:1.5 (mass ratio). The polymerization temperature is 45°C, and the polymerization time is 6 hours. After the polymerization reaction, the initial product is concentrated by rotary evaporation, and then cut into pieces, dried, crushed, and sieved to obtain a white powdery thickener.

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Abstract

The invention discloses a linear glue thickener for oil well fracturing, which can be obtained by the following method: it is composed of polymerized monomers acrylamide, itaconic acid and pyrrolidone, and the mass ratio of acrylamide, itaconic acid and pyrrolidone is (10~15):(5~8):(4~6); After completely dissolving acrylamide and itaconic acid in water, add pyrrolidone and make it completely dissolved, add the initiator dropwise to initiate monomer polymerization, and then polymerize The temperature is 30-50°C, the polymerization time is 2-48 hours, a colloidal solution is formed, the polymerization product is separated, and then cut into pieces, dried, crushed, and sieved to obtain a white powdery substance that is the thickener . The preparation process of the thickener is simple, which can better meet the needs of on-site fracturing fluid preparation; it is easy to break the gel, has less residue, and has little damage to the formation; it has good temperature resistance, shear resistance and stability, and is suitable for medium-low temperature and medium-high temperature oil wells fracture.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field fracturing, and in particular relates to a linear glue thickener for oil well fracturing. The invention also relates to a process for the preparation of this thickener. Background technique [0002] Fracturing technology can improve the fluid connectivity between the reservoir and the wellbore, and increase the conductivity of the formation, so it is an important oil and gas well stimulation measure. Fracturing fluid is the liquid used in pressure measures that use liquid conduction force in order to obtain high production. It is an important part of fracturing technology. Its main function is to create fractures and transport proppant along the open fractures. The conductivity of sand fractures. Fracturing fluids are mainly divided into water-based fracturing fluids, oil-based fracturing fluids, alcohol-based fracturing fluids, and foam fracturing fluids. Among them, water-based frac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/02C09K8/68
Inventor 李莉花张蕊玲张凯陈静
Owner 陕西森瑞石油技术开发有限公司
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