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Method and equipment for treating drilling fracturing return liquid of oil and gas field

A technology for fracturing flowback fluid and treatment methods, which is applied in sludge treatment, multi-stage water treatment, water/sewage treatment, etc., and can solve problems such as difficult treatment, strong acidity, and strong corrosion

Active Publication Date: 2017-10-10
方明环保科技(漳州)有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because the fracturing flowback fluid contains oil, mineralized water, chemical substances and fracturing functional substances, it is highly corrosive and acidic, so it is difficult to deal with it by traditional methods
It is reported that various methods such as biological, physical and chemical, and membrane filtration cannot be effectively degraded due to their special components. Therefore, a large amount of existing fracturing flowback fluids are discarded in the storage pools of the desert grassland and Gobi, which constitutes serious environmental pollution. Hidden danger

Method used

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  • Method and equipment for treating drilling fracturing return liquid of oil and gas field
  • Method and equipment for treating drilling fracturing return liquid of oil and gas field

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Embodiment Construction

[0031] Please check figure 1 , oil and gas field drilling fracturing flowback fluid treatment method, including:

[0032] Step (1), the oil and gas separation step, separates the oil and water of the fracturing flowback fluid, and recovers the separated oil; in the specific steps: the fracturing flowback fluid is pumped into a separation container with a bubble generator through a sewage pump, and the fracturing The flowback liquid flows into the separation container, and the micro-bubbles generated by the electric floating device in the separation container float to the liquid surface with the fine oil strains mixed in the liquid, and the oil on the liquid surface is skimmed by the micro-bubbles into the upper opening of the separation container The fracturing flowback fluid from which the oil is separated is pumped to the next step for treatment;

[0033] Step (2), the step of adjusting the pH value, adjusts the pH value of the fracturing flowback fluid of the separated oil...

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Abstract

The invention discloses a method and equipment for treating drilling fracturing return liquid of an oil and gas field. According to the method, fracturing return liquid is subjected to oil and gas separation, pH value regulation, electric flocculation, primary physico-chemical precipitation clarification, electrocatalytic oxidative degradation, secondary physico-chemical precipitation clarification, mud-water separation device treatment and discharge or recycling, three functions including oil recycling, water treatment and mud curing of the drilling fracturing return liquid can be realized, standard discharge or reinjection application of the fracturing return liquid can be realized, and the aim of resource utilization can be realized. The method has great social and economic meanings for pollutants in oil field drilling operation, and can be used for reducing cost for transportation, storage and treatment of fracturing liquid and recycling water in other application on the ground.

Description

technical field [0001] The invention relates to equipment used in oil and gas fields, in particular to a treatment method and equipment for drilling and fracturing flowback fluid in oil and gas fields. Background technique [0002] Oil and gas fields (hereinafter referred to as oil and gas fields) need to perform fracturing operations after the drilling is completed. The purpose of the fracturing operation is to use the chemical corrosion components of the fracturing fluid under the action of pressure to fracturing and dredge the oil and gas-bearing fractures in the rock formation, so that the oil and gas can be smoothly concentrated along or through the fractures into the well and pumped out through the lift. The oil and gas machine is produced outside the well. The fracturing fluid is artificially prepared and contains a variety of (about twenty) chemical substances and a variety of fracturing functional substances. It is chemically corrosive and cannot remain in the form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06E21B41/00C02F103/10
CPCE21B41/0057C02F9/00C02F2305/023C02F2301/08C02F2301/046C02F2103/10C02F11/122C02F1/40C02F1/5281C02F1/463C02F1/4672C02F1/725C02F1/66
Inventor 罗烈明
Owner 方明环保科技(漳州)有限公司
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