Fracturing flow-back fluid treatment method

A technology of fracturing flowback fluid and treatment method, which is applied in the direction of filtration treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve the problems of simple process and other problems, and achieve the effect of easy technical conditions, thorough treatment and wide application range

Pending Publication Date: 2019-03-12
XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that the treatment process of fracturing flowback fluid reuse in the prior art is s

Method used

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  • Fracturing flow-back fluid treatment method
  • Fracturing flow-back fluid treatment method

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Embodiment 1

[0031] A method for treating fracturing flowback fluid according to the present invention, the device involved in the method is composed of a water pretreatment reactor 1, a pipeline 2, a first water pump 3, a primary treatment reactor 4, and a second water pump 5. The first dosing mixer 6, the microwave reactor 7, the third water pump 8, the second dosing mixer 9, the air flotation device 10, the dissolved air pump 11, the fourth water pump 12, the sand filter tower 13, the fifth Water pump 14, active carbon blanket adsorption tower 15, the 6th water pump 16 and specific resin adsorption tower 17 are made up of, at one end of microwave reactor 7 respectively through pipeline 2 and first dosing mixer 6, primary treatment reactor 4 and water The pretreatment reactors 1 are connected in series, the first water pump 3 is provided between the water pretreatment reactor 1 and the primary treatment reactor 4, and the second water pump 5 is provided between the primary treatment react...

Embodiment 2

[0048] The device described in this embodiment is carried out according to embodiment 1, and the specific operation is carried out according to the following steps:

[0049] Using this method to treat guar gum: the guar gum-based fracturing flowback fluid is dark brown, with a high oil content, a pH value of 5.18, a COD of 2260 mg / L, and a concentration of suspended solids of 1700 mg / L;

[0050] Pretreatment of fracturing flowback fluid:

[0051] a. Add 100ppm of clay to the guar gum-based fracturing flowback fluid, stir evenly, enter the pretreatment reactor 1, perform pretreatment, and remove the large solid particles and upper oil slick in it by static precipitation;

[0052] Primary processing:

[0053] b. The product treated in step a enters the primary treatment reactor 4 through the first water pump 3, and hydrochloric acid is added to adjust the pH value of the solution to 6.8;

[0054] Microwave catalytic oxidation treatment:

[0055] c. The solution obtained in st...

Embodiment 3

[0065] The device described in this embodiment is carried out according to embodiment 1, and the specific operation is carried out according to the following steps:

[0066] Pretreatment of fracturing flowback fluid:

[0067] a. Add 90ppm of clay to the guar gum-based fracturing flowback fluid, stir evenly, enter the pretreatment reactor 1, perform pretreatment, and remove the large solid particles and upper oil slick in it by static precipitation;

[0068] Primary processing:

[0069] b. The product treated in step a enters the primary treatment reactor 4 through the first water pump 3, and hydrochloric acid is added to adjust the pH value of the solution to 6.5;

[0070] Microwave catalytic oxidation treatment:

[0071] c, the solution obtained in step b enters the first dosing mixer 6 through the second water pump 5, adds sensitizer carbon fiber short fiber 80ppm, mixes evenly, enters the microwave reactor 7, and the microwave reactor 7 is a hollow cavity structure, the ...

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Abstract

The invention relates to a fracturing flow-back fluid treatment method. A device involved in the method comprises a water pretreatment reactor, a pipeline, a first water pump, a primary treatment reactor, a second water pump, a first dosing mixer, a microwave reactor, a third water pump, a second dosing mixer, an air-floating device, a dissolved air pump, a fourth water pump, a sand filtering tower, a fifth water pump, an activated carbon adsorption tower, a sixth water pump and a specific resin adsorption tower, fracturing flow-back fluids are treated by the steps of pretreatment, primary treatment, microwave catalytic oxidation, flocculating air-floating, filtration by the sand filtering tower, adsorption by the activated carbon adsorption tower, specific adsorption deep treatment and the like, harmful impurities in the fracturing flow-back fluids are removed, various standard requirements of preparing water for fracturing fluids again are met, and the method is used for preparing the fracturing fluids. Refined recycling treatment of the fracturing flow-back fluids is realized, the method is simple in operation and strong in adaptability, reuse rate reaches 95% or more, the technical problem of difficulty in reuse of the fracturing flow-back fluid is fundamentally solved, and the goals of efficiency increase, energy conservation, water conservation and environmental protection are achieved.

Description

technical field [0001] The invention relates to a treatment method for fracturing flowback fluid, which belongs to the field of environmental protection. Background technique [0002] Fracturing operation is an important link in the process of oil and gas field exploitation. The process is to use a high-pressure and large-displacement pump on the ground, and use the principle of liquid pressure transmission to pump a liquid with a certain viscosity (commonly called fracturing fluid) at a rate greater than The pressure of the absorption capacity of the oil layer is injected into the oil layer, and the pressure in the wellbore is gradually increased, so that a high pressure is generated at the bottom of the well. When the pressure is greater than the in-situ stress near the well wall and the tensile strength of the formation rock, the Fractures in the nearby formations: continue to inject sand-carrying fluid with proppant, the fractures extend forward and fill with proppant, a...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F103/10
CPCC02F9/00C02F1/001C02F1/24C02F1/302C02F1/281C02F1/5245C02F1/56C02F2103/10C02F2201/007C02F2301/08
Inventor 刘向阳卞卫国张芳袁
Owner XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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