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Nano liquid destroying agent for fracturing fluid and preparation method thereof

A fracturing fluid and breaking agent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of polymer molecular chain not being completely broken, fracturing fluid breaking glue, etc., to achieve safe storage and use Improve performance, reduce corrosion, good stability

Active Publication Date: 2019-07-12
CHENGDU LEARN PRACTICES TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems in the above-mentioned prior art that the fracturing fluid breaks in advance and the polymer molecular chain cannot be completely broken, the present invention provides a safe and stable nano-liquid breaker that can completely degrade polymer molecules and delay gel breaking and its preparation method

Method used

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  • Nano liquid destroying agent for fracturing fluid and preparation method thereof
  • Nano liquid destroying agent for fracturing fluid and preparation method thereof
  • Nano liquid destroying agent for fracturing fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] S1. Add 1.6g of cationic Gemini 8-3-8 [C 8 h 17 (CH 3 ) 2 N(CH 2 ) 3 N(CH 3 ) 2 C 8 h 17 Br 2 )] put it into the reaction kettle, heat up to 80-90°C and fully heat and melt, control the heating rate to 3°C / min during the heating process, start stirring and slowly put in 10g of water, the stirring speed is 120r / min, and the temperature is controlled at 60 -80°C, stop heating after adding water, put 4g of non-ionic emulsifier TX-30 into the reaction kettle, establish internal circulation through the emulsification pump, and turn on the refrigeration at the same time to control the liquid temperature in the reaction kettle at 30±2°C;

[0037] S2. Add auxiliary additives 1g OP-30 and 0.4g OS-15 to 15g aqueous solution containing 5g ammonium persulfate, stir evenly, and slowly drop into the solution obtained in S1 under mechanical stirring, and the dropping time is controlled at 50-70min , after the completion, continue to shear and stir for 10 minutes, keep the em...

Embodiment 2

[0039] 2.5g cationic Gemini 12-4-12 type [C 12 h 25 (CH 3 ) 2 N(CH 2 ) 4 N(CH 3 )2 C 12 h 25 Br 2 )] put it into the reaction kettle, heat up to 80-90°C and fully heat and melt, control the heating rate to 2°C / min during the heating process, start stirring and slowly put in 30g of water, the stirring speed is 160r / min, and the temperature is controlled at 60 -80°C, stop heating after adding water, put 4g of non-ionic emulsifier EL-60 into the reaction kettle, establish internal circulation through the emulsification pump, and turn on the refrigeration at the same time to control the liquid temperature in the reaction kettle at 30±2°C;

[0040] S2. Add auxiliary additive 1.3g OS-15 to 10g of aqueous solution containing 2.5g of ammonium persulfate and stir evenly, and slowly drop into the solution obtained in S1 under mechanical stirring. The dropping time is controlled at 50-70min, and continue to cut Cut and stir the reaction for 10 minutes, and keep the emulsificatio...

Embodiment 3

[0042] S1. Put 5g of cationic Gemini 16-5-16 type [C 16 h 33 (CH 3 ) 2 N(CH 2 ) 5 N(CH 3 ) 2 C 16 h 33 Br 2 )] put it into the reaction kettle, heat up to 80-90°C and fully heat and melt, control the heating rate to 3°C / min during the heating process, start stirring and slowly put in 25.3g of water, the stirring speed is 140r / min, and the temperature is controlled at 60-80°C, stop heating after adding water, put 8g of non-ionic emulsifier APG1214 into the reactor, establish internal circulation through the emulsification pump, and turn on the refrigeration at the same time to control the liquid temperature in the reactor at 30±2°C;

[0043] S2. Add auxiliary additives 1.5g T20 and 0.2g Pingpingjia O-10 to 10g aqueous solution containing 4g ammonium persulfate, stir evenly, and slowly drop into the solution obtained in S1 under mechanical stirring, and the dropping time is controlled at 50-70min , after the completion, continue to shear and stir for 10 minutes, and ke...

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Abstract

The invention discloses a nano liquid destroying agent for fracturing fluid and a preparation method thereof. The nano liquid destroying agent for the fracturing fluid is prepared from, by weight, 5.2-16.4% of peroxide, 2.3-10% of a gemini surfactant, 8.4-16.0% of a nonionic emulsifier, 1.9-4.4% of an auxiliary additive and 62.5-78.5% of a solvent; the structure of the nano liquid destroying agentfor the fracturing fluid is that the nonionic emulsifier and the gemini surfactant form a mixed micelle or vesicle having a closed double layer structure, and the peroxide and the inner layer structure constitute an ion pair and are wrapped inside the micelle or vesicle; the mixed micelle or vesicle size of the nano liquid destroying agent is nanometer-scale and specifically is between 15 and 100nanometre. The agent can meet the gel breaking requirements of the polymer fracturing fluid and the silicone fracturing fluid, and has the advantages of good storage stability at room temperature, weak corrosiveness, long storage period and good delayed gel breaking effect.

Description

technical field [0001] The invention relates to an oil and gas field fracturing fluid system, in particular to a nanometer liquid breaker for fracturing fluid and a preparation method thereof. Background technique [0002] The fracturing fluid mainly plays the role of carrying proppant and creating fractures in the stimulation process. The ideal fracturing fluid should not cause damage to the reservoir after entering the reservoir; It has a good thickening effect. After the fracturing operation, it must be completely broken and flowed back, otherwise a large number of polymer fragments will be generated and block the formation, causing serious reservoir damage. Glue is used to degrade thickener molecules to reduce damage. [0003] Strong oxidants represented by ammonium persulfate are most widely used as gel breakers in oil fields, and are injected into formations simultaneously with fracturing fluid during construction. However, this kind of strong oxidant itself has pote...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/70
CPCC09K8/68C09K8/685C09K8/706C09K2208/26C09K2208/32
Inventor 任山王继宇郭建春唐朝钧张绍彬刘斌侯向前寇将卢聪张淑青王梦莹康毅
Owner CHENGDU LEARN PRACTICES TECH CO LTD
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