Recycling compounding treatment method for fractured flow-back liquid and device

Abstract

The invention discloses a recycling compounding treatment method for fractured flow-back liquid and a device, and belongs to the technical field of wastewater treatment for oil fields. According to the recycling compounding treatment method for the fractured flow-back liquid and the device, a collecting pool, a primary air-flotation picking tool, a secondary air-flotation picking tool, a catalyticoxidation picking tool and solid-liquid separation system equipment are utilized, and through the processes of mixed collection, coagulation air floatation, calcium and magnesium ion removal, catalytic oxidation and solid-liquid separation, and recycling compounding of the fractured flow-back liquid is achieved. In this way, the problems of lack of water resources, difficulty in water transportation in mountainous areas and high cost are solved, thus pollution and discharge are further lowered, advancement of the process of recycling and reusing of treatment resources of the fractured flow-back liquid of oil fields, and the process of energy conservation and emission reduction of the oil fields is promoted, and the target of green development of the oil fields is achieved.

Description

technical field [0001] The invention relates to the technical field of oilfield wastewater treatment, in particular to a method and device for reusing and compounding treatment of fracturing flowback fluid. Background technique [0002] Fracturing is an important link in the process of oil and gas field exploitation, through fracturing to improve the permeability of oil and gas layers and remove plugging. Fracturing technology plays a very important role in tapping the potential of oil wells in old areas, new well testing, and single well stimulation. Major oilfields realize oil and gas well stimulation through fracturing operations, and fracturing technology occupies an irreplaceable position in oilfield development. [0003] Waste fluid will inevitably be generated during the fracturing process. The flowback waste fluid generated during the fracturing operation has become a pollution source that cannot be ignored in the oilfield production process. If the waste fluid is di...

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Problems solved by technology

[0003] Waste fluid will inevitably be generated during the fracturing process. The flowback waste fluid generated during the fracturing operation has become a pollution source that cannot be ignored in the oilfield production process. If the waste fluid is directly discharged, it will be directly sent to the well site The ecological environment has caused great harm, seriously affecting oilfield production and social impact. Due to the characteristics of high viscosity, good stability, and high COD of fracturing waste fluid, it is difficult to meet environmental protection standards for direct discharge treatment, and the treatment cost is high. Therefore, there is an urgent need for a The treatment method of fracturing flowback fluid is used to solve the above pollution problems

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