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Environment-friendly pressure-reducing injection-increasing multi-twin active agent and preparation method thereof

An active agent and environment-friendly technology, which is applied in the composition and preparation of environment-friendly step-down injection multi-twin active agents, can solve the problems of less research and achieve the effect of reducing water injection pressure and preventing expansion and migration

Inactive Publication Date: 2020-02-11
BEIJING SHENGCHANG CENTURY PETROLEUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surfactants for water injection wells in oil fields can effectively inhibit the migration of clay minerals in water injection wells, hydration expansion and emulsified oil in water, and can unblock water injection wells, reduce drag, reduce pressure and increase injection. Water injection development provides technical support, but less research

Method used

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  • Environment-friendly pressure-reducing injection-increasing multi-twin active agent and preparation method thereof
  • Environment-friendly pressure-reducing injection-increasing multi-twin active agent and preparation method thereof
  • Environment-friendly pressure-reducing injection-increasing multi-twin active agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An environment-friendly multi-twin active agent for reducing pressure and increasing injection, the proportion of which is as follows:

[0025]

[0026] The quaternary ammonium salt is dodecyl benzyl ammonium chloride, the pH regulator is sodium hydroxide, and the solution cloud point regulator is dodecyl ammonium chloride.

[0027] Preparation method: first add 635Kg of water to the reactor, then add 5Kg of polyoxyethylene copolymer resin into the reactor at a speed of 105 rpm, stir for 2 hours until it is fully dissolved, then add 100Kg of dimethyl allyl ammonium chloride , 100Kg guanidine nitrate, 100Kg quaternary ammonium dodecylbenzyl ammonium chloride, 5Kg pH regulator and 5Kg cloud point regulator, and fully stirred for four hours, with a speed of 105 rpm; heated to 50-55 ° C, React for 3-5 hours, continuously stir during the reaction, and react at a constant temperature to obtain the product.

[0028] The appearance of the product is colorless or light yello...

Embodiment 2

[0030] An environment-friendly multi-twin active agent for reducing pressure and increasing injection, the proportion of which is as follows:

[0031]

[0032] The quaternary ammonium salt is dodecyl benzyl ammonium chloride, the pH regulator is sodium hydroxide, and the solution cloud point regulator is tetradecyl ammonium chloride.

[0033] Preparation method: first add 535Kg of water to the reactor, then add 5Kg of polyoxyethylene copolymer resin into the reactor at a speed of 105 rpm, stir for two hours until it is fully dissolved, then add 200Kg of dimethyl allyl ammonium chloride , 150Kg guanidine nitrate, 100Kg quaternary ammonium dodecylbenzyl ammonium chloride, 5Kg pH regulator and 5Kg cloud point regulator, the rest are water, and fully stirred for four hours, 105 rev / min of rotating speed; Warming up to 50 -55°C, react for 3-5h, stir continuously during the reaction, and react at constant temperature to obtain the product.

[0034] The appearance of the product ...

Embodiment 3

[0036] An environment-friendly multi-twin active agent for reducing pressure and increasing injection, the proportion of which is as follows:

[0037]

[0038]

[0039] The quaternary ammonium salt is cetyl benzyl ammonium chloride, the pH regulator is citric acid, and the solution cloud point regulator is dodecyl ammonium chloride, tetradecyl ammonium chloride and amine oxide.

[0040] Preparation method: first add 585Kg of water to the reactor, then add 5Kg of polyoxyethylene copolymer resin into the reactor at a speed of 105 rpm, stir for two hours until it is fully dissolved, then add 100Kg of dimethyl allyl ammonium chloride , 80Kg guanidine nitrate, 120Kg guanidine acetate, 100Kg cetyl benzyl ammonium chloride, 5Kg pH regulator and 5Kg cloud point regulator, all the other are water, and fully stirred for four hours, 105 revolutions / min of rotating speed; Warming up to 50-55°C, react for 3-5h, stir continuously during the reaction, and react at constant temperature ...

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Abstract

The invention provides an environment-friendly pressure-reducing injection-increasing multi-twin active agent and a preparation method thereof, wherein the environment-friendly pressure-reducing injection-increasing multi-twin active agent comprises, by mass, 0.01-0.5% of a polyoxyethylene copolymer resin, 2-45% of dimethyl diallyl ammonium chloride, 5-20% of an organic guanidine compound, 4-16% of a quaternary ammonium salt, 0.1-0.6% of a pH regulator, 0.1-0.6% of a cloud point regulator, and the balance of water. According to the invention, with the environment-friendly pressure-reducing injection-increasing multi-twin active agent, the hydrated expansive clay in stratum becomes insensitive when contacting the injected water, or the reservoir with low permeability expands reversely whilethe resistance of the injected water is substantially reduced, so that the pressure-reducing injection-increasing and plugging release of oil and gas field water injection wells is achieved.

Description

technical field [0001] The invention relates to the application field of oil field chemistry, in particular to the composition and preparation method of an environment-friendly depressurization and injection multi-twin active agent, which can make the hydration-swellable clay in the formation insensitive when it contacts with injection water, or make the seepage Reverse the expansion phenomenon of low-rate reservoirs, and at the same time greatly reduce the resistance of injection water, and realize the depressurization and injection increase and plugging removal of water injection wells in oil and gas fields. Background technique [0002] With the deepening of oilfield water injection, some oilfield reservoirs are loosely cemented and highly water-sensitive, which can easily cause particles to migrate and expand to block pores and throats, making water injection difficult; most oilfields are reinjected into sewage oilfields, and the injected water contains solid suspended pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/575
CPCC09K8/524C09K8/5755
Inventor 牛文彬马永红郝少军张磊刘斌段宝虹李强随国杰薛成
Owner BEIJING SHENGCHANG CENTURY PETROLEUM TECH
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