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Water purification viscosity reducer and preparation method thereof

A viscosity reducer and water purification technology, which is applied in the direction of chemical instruments and methods, water pollutants, natural water treatment, etc., can solve the problems of high treatment cost, high viscosity, poor feasibility, etc., and achieve good and obvious effect of viscosity reduction , solve complicated effects

Active Publication Date: 2020-07-28
DAQING HUAYING CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymer fracturing fluid has the characteristics of high flowback fluid viscosity and high sulfide content. When the fracturing flowback fluid directly enters the surface oil-water treatment system, oil-water separation is difficult, which seriously affects the normal production and operation of the combined station and sewage station. ; If the polymer fracturing flowback fluid is directly treated up to the standard, the treatment process is complicated, the treatment cost is high, and the feasibility is poor

Method used

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  • Water purification viscosity reducer and preparation method thereof
  • Water purification viscosity reducer and preparation method thereof
  • Water purification viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of water purification and viscosity reducing agent, the specific operation method is as follows:

[0016] Put 100 parts of tap water into the reactor, start stirring, the speed is 300r / min, heat up to 30℃, put in 50 parts of polyallyl hydroxyethyl diethyl ammonium chloride (molecular weight 3000Da), stir for 2h Evenly, add 30 parts of octadecyl trimethyl ammonium chloride, the speed of rotation is 500r / min, fully stir for 30min, increase the speed to 1000r / min, add 10-part of ammonium persulfate, and fully stir for 30min to obtain Water purification viscosity reducer.

Embodiment 2

[0018] A preparation method of water purification and viscosity reducing agent, the specific operation method is as follows:

[0019] Put 300 parts of tap water into the reactor, turn on the stirring, the speed is 300r / min, heat up to 40℃, put in 100 parts of polyallyl hydroxyethyl diethyl ammonium chloride (molecular weight 9000Da), stir for 5h Evenly, add 50 parts of octadecyl trimethyl ammonium chloride, the speed of rotation is 500r / min, fully stir for 30min, increase the speed to 1000r / min, add 30 parts of ammonium persulfate, fully stir for 30min, the net is obtained Water viscosity reducer.

Embodiment 3

[0021] A preparation method of water purification and viscosity reducing agent, the specific operation method is as follows:

[0022] Put 200 parts of tap water into the reactor, start stirring, the speed is 300r / min, heat up to 35℃, put in 80 parts of polyallyl hydroxyethyl diethyl ammonium chloride (molecular weight 6000Da), stir for 3h Evenly, add 40 parts of octadecyl trimethyl ammonium chloride, the speed of rotation is 500r / min, fully stir for 30min, increase the speed to 1000r / min, add 20 parts of ammonium persulfate, fully stir for 30min, and make the net Water viscosity reducer.

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Abstract

The invention discloses a water purification viscosity reducer. The invention relates to the technical field of well washing and fracturing water purification viscosity reducers. The preparation method comprises the following steps: adding 100-300 parts of tap water into a reaction kettle; starting stirring, heating the tap water to 30-40 DEG C, adding 50-100 parts of polyallyl hydroxyethyl diethylammonium chloride, uniformly stirring the liquid for 2-5 hours, adding 30-50 parts of octadecyl trimethyl ammonium chloride, and fully stirring the mixture for 30 minutes; increasing the stirring rate to 1000 r / min, adding 10-30 parts of ammonium persulfate, and fully stirring the mixture for 30 minutes to obtain the water purification viscosity reducer. The water purification viscosity reducer produced by the method has a good viscosity reduction effect on flowback fluid, and also has an obvious sulfide removal effect. The polymer fracturing flow-back fluid pretreatment device can indirectlyand quickly pretreat polymer fracturing flow-back fluid at normal temperature, the treated flow-back fluid can enter a gathering and transportation system of a combination station, normal productionand operation of the system are not affected, and the purpose of stable production is achieved.

Description

Technical field: [0001] The invention relates to the technical field of water purifying and viscosity reducing agents for well washing and fracturing, in particular to a preparation method of a water purifying and viscosity reducing agent. Background technique: [0002] Fracturing is one of the important technical measures for increasing production and injection of oil, gas, and water wells in various oil and gas fields across the country. With the gradual maturity of my country’s unconventional oil reservoir development technology, hydraulic fracturing technology is widely used in various oil fields, and the use of polymer fracturing fluids is increasing. During the fracturing process, a large amount of fracturing flowback fluid will be produced with very high composition. complex. If the fracturing flowback fluid is discharged outside, it will have a great impact on the surrounding crops and surface water system. [0003] At present, my country’s emphasis on environmental protec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/58C02F101/10C02F103/36
CPCC02F1/00C02F1/58C02F2101/101C02F2103/365
Inventor 王桂龙孙安顺
Owner DAQING HUAYING CHEM IND
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