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Method for preparing fracturing fluid by utilizing polymer type fracturing flow-back fluid

A technology of fracturing flowback fluid and fracturing fluid, which is applied in the direction of drilling composition, chemical instruments and methods, and special compound water treatment, which can solve pollution and other problems, achieve pollution, improve effect, and increase biological activity Effect

Pending Publication Date: 2021-10-01
三桶油环保科技(宜兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing fracturing fluid by using polymer-type fracturing flowback fluid in order to solve the problems of environmental pollution by fracturing flowback fluid and reduce the cost of fracturing construction

Method used

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  • Method for preparing fracturing fluid by utilizing polymer type fracturing flow-back fluid
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  • Method for preparing fracturing fluid by utilizing polymer type fracturing flow-back fluid

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specific Embodiment approach 1

[0021] Specific embodiment one: In this embodiment, a method for preparing fracturing fluid by using polymer-type fracturing flowback fluid is carried out according to the following steps:

[0022] 1. Inject the fracturing flowback fluid into the sedimentation tank, and after 12-18 hours of natural settlement, pump it into the ultrasonic air flotation device, ultrasonically float it for 30-60 minutes under the ultrasonic power of 200-400W, and then pump it into the ozone catalytic oxidation tank , treated with ozone for 2-4 hours at an ozone mass concentration of 40-80mg / L, and then pumped into the biological aerated filter. Osmotic filtration and high-pressure reverse osmosis filtration with an operating pressure of 10-13 MPa to obtain the fracturing flowback fluid after reverse osmosis treatment, adding nano-zinc oxide to the biological aerated filter tank, the addition amount of nano-zinc oxide is 0.02- 0.04g / L; when carrying out ozone catalytic oxidation in the ozone catal...

specific Embodiment approach 2

[0034] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: In step 1, the fracturing flowback fluid is injected into the settling tank, and it settles naturally for 12 hours.

[0035] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the pump is pumped into the ultrasonic air flotation device, and the ultrasonic air flotation is carried out for 30 minutes under the ultrasonic power of 200W; Hydrogen peroxide and ozone are introduced, and the dosage of hydrogen peroxide is 0.5L / t.

[0037] Other steps are the same as those in Embodiment 1 or 2.

[0038] Hydrogen peroxide is a strong oxidizing agent that can degrade some organic pollutants.

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Abstract

The invention discloses a method for preparing fracturing fluid by utilizing polymer type fracturing flow-back fluid, and relates to the technical field of fracturing flow-back fluid reutilization. The invention aims to solve the problem of pollution of fracturing flow-back fluid to the environment and reduce the fracturing construction cost. The method comprises the following steps of: mixing 0.2-0.4 parts of base fluid, 0.002-0.004 parts of a cross-linking agent, 0.00002-0.00005 parts of a gel breaker and 99.6-99.8 parts of fracturing flow-back fluid subjected to reverse osmosis treatment, and fully stirring to obtain fracturing fluid. The base fluid is prepared from 25 parts of guanidine gum, 5 parts of a cleanup additive, 4 parts of a demulsifying agent, 5 parts of sodium carbonate, 1 part of sodium bicarbonate, 50 parts of a liquid clay stabilizer, 3 parts of a defoaming agent, 5 parts of a vegetable gum stabilizer and 3 parts of a sterilizing agent. The method for preparing fracturing fluid by utilizing polymer type fracturing flow-back fluid is obtained.

Description

technical field [0001] The invention relates to the technical field of reuse of fracturing flowback fluid, in particular to a method for preparing fracturing fluid by using polymer type fracturing flowback fluid. Background technique [0002] Fracturing technology is to inject fracturing fluid into the formation through reservoir fractures, further expand the formation fractures, and then improve the reservoir fracture network system through proppant fractures, so as to achieve the purpose of increasing production. With the expansion of oilfield exploration and development, fracturing technology has also been applied on a large scale, and the water consumption and wastewater production of fracturing operations have increased year by year. The fracturing flowback fluid contains pollutants with complex components and stable performance, and the environmental problems caused by this have attracted increasing attention. [0003] Fracturing fluid flowback fluid has the character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C02F9/14C02F101/10C02F101/32
CPCC09K8/685C09K8/887C09K8/905C09K8/90C09K8/608C09K8/602C09K8/605C09K8/885C02F9/00C09K2208/26C09K2208/12C02F2001/007C02F1/24C02F1/36C02F1/722C02F1/78C02F1/725C02F1/50C02F1/441C02F3/02C02F2209/03C02F2209/44C02F2101/10C02F2305/06C02F2101/32
Inventor 魏利张昕昕魏东李春颖
Owner 三桶油环保科技(宜兴)有限公司
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