Preparation method of rosin-based drag reducer for shale gas development

A technology based on rosin and shale gas, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as environmental pollution and low resistance reduction rate of polymers, and achieve low price, high resistance reduction rate, and production low cost effect

Active Publication Date: 2017-07-18
山东德坤工贸有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of rosin-based drag reducer for...

Method used

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Examples

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preparation example Construction

[0026] A preparation method of rosin-based drag reducer for shale gas development, the specific steps of the method are:

[0027] ① Preparation of polyethylene glycol diacrylate: In a 250ml three-neck flask equipped with a reflux condenser and a water separator, add 20-40g polyethylene glycol-1000, 5-10g 2-methacrylic acid, 0.2-0.5g Catalyst and 0.02-0.04g polymerization inhibitor, under the protection of nitrogen, heat to 100-120°C for 3-7 hours, stop the reaction, and cool to obtain polyethylene glycol diacrylate;

[0028] ②Preparation of hydrogenated abietyl alcohol methacrylate: dissolve 10-20g of hydrogenated abietyl alcohol, 2-3g of pyridine and 0.03-0.05g of polymerization inhibitor in 20-30g of tetrahydrofuran, add 3-5g of methacryloyl chloride, and dissolve at 40 React at ~50°C for 5-7 hours, filter to remove pyridine hydrochloride, and distill the filtrate to remove the solvent to obtain hydrogenated abietyl alcohol methacrylate;

[0029] ③In a 250ml three-neck flas...

Embodiment 1

[0032] ①In a 250ml three-neck flask equipped with a reflux condenser and a water separator, add 20g of polyethylene glycol-1000, 10g of 2-methacrylic acid, 0.5g of p-toluenesulfonic acid and 0.02g of hydroquinone, under nitrogen protection , After heating to 100-120°C for 5 hours, stop the reaction and cool to obtain polyethylene glycol diacrylate.

[0033] ② Dissolve 10g of hydrogenated abietyl alcohol, 2g of pyridine and 0.03g of hydroquinone in 20g of tetrahydrofuran, add 3g of methacryloyl chloride, react at 40-50°C for 5h, remove pyridine hydrochloride by filtration, and remove the filtrate by distillation After solvent, hydrogenated abietyl alcohol methacrylate was obtained.

[0034] ③In a 250ml three-necked flask equipped with a reflux condenser and a thermometer, add 5g of polyethylene glycol diacrylate, 15g of hydrogenated abietyl methacrylate, 3g of maleic anhydride, 4g of sodium methacrylate, and 3g of butyl acrylate. After reacting ester and 0.5g potassium persulf...

Embodiment 2

[0037] ①In a 250ml three-necked flask equipped with a reflux condenser and a water separator, add 40g polyethylene glycol-1000, 5g 2-methacrylic acid, 0.2g p-toluenesulfonic acid and 0.03g hydroquinone, , heated to 100-120°C for 7 hours, stopped the reaction, and cooled to obtain polyethylene glycol diacrylate.

[0038] ② Dissolve 15g of hydrogenated abietyl alcohol, 3g of pyridine and 0.04g of hydroquinone in 30g of tetrahydrofuran, add 4g of methacryloyl chloride, react at 40-50°C for 6h, remove pyridine hydrochloride by filtration, and remove the filtrate by distillation After solvent, hydrogenated abietyl alcohol methacrylate was obtained.

[0039] ③In a 250ml three-neck flask equipped with a reflux condenser and a thermometer, add 10g of polyethylene glycol diacrylate, 17g of hydrogenated abietyl methacrylate, 3g of maleic anhydride, 5g of sodium methacrylate, and 4g of butyl acrylate. After reacting ester and 0.7g potassium persulfate at 80-90°C for 5 hours, cool to roo...

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Abstract

The invention provides a preparation method of a rosin-based drag reducer for shale gas exploitation and relates to a preparation method of a high-molecular polymer drag reducer. The method comprises the specific steps that 1, polyethyleneglycol diacrylate is prepared; 2, methacrylic hydroabietyl acrylate is prepared; 3, 5-10 g of polyethyleneglycol diacrylate, 15-20 g of methacrylic hydroabietyl acrylate, 3-5 g of maleic anhydride, 4-6 g of sodium methallyl sulfonate, 3-5 g of butyl acrylate and 0.5-1.5 g of an initiator are added into a flask, after reacting for 4-6 h at the temperature of 80 DEG C-90 DEG C, the product is cooled to room temperature, and a NaOH water solution with the concentration being 20-40% is used for neutralizing a pH value to be 7-8, so that the rosin-based drag reducer for shale gas exploitation is prepared. According to the prepared product, when the concentration of the drag reducer is 0.01-0.3 wt%, the drag reduction rate is 80% or above, and the adopted raw materials cause little pollution to the environment, and are wide in source and relatively low in price; the preparation technology is simple, and large-scale production can be achieved easily.

Description

technical field [0001] The invention relates to a preparation method of a polymer drag reducer, in particular to a preparation method of a rosin-based drag reducer for shale gas development. Background technique [0002] Shale gas is a high-quality, efficient, clean and low-carbon energy. In recent years, it has attracted more and more attention from all over the world, and it will also be the focus of my country's "13th Five-Year Plan". Shale reservoirs are characterized by low porosity and permeability, and are difficult to explore and develop. Most tight shale gas reservoirs need to undergo volume transformation to obtain ideal production. At present, the developed countries mainly adopt the drag-reducing water fracturing fluid system. This system has low polymer content, easy reverse flow, low cost and little damage to the reservoir. It has been widely promoted and applied in many regions. [0003] In recent years, with the discovery of many large shale gas reservoirs i...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F222/20C08F222/06C08F220/06C09K8/68
CPCC08F220/18C08F220/1818C09K8/68C09K8/882C09K2208/28C08F222/1063C08F222/06C08F220/06C08F220/1804
Inventor 卢炳雄于景维黄远林徐文礼
Owner 山东德坤工贸有限公司
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