Skid-mounted device for circulating treatment of oil field well flushing flowback fluid and circulating treatment method for oil field well flushing flowback fluid

Abstract

The invention relates to a skid-mounted device for circulating treatment of oil field well flushing flowback fluid and a circulating treatment method for oil field well flushing flowback fluid. The skid-mounted device comprises three parts, namely a buffering sedimentation pry, an air-floatation pry and a filtering pry, wherein the buffering sedimentation pry and the air-floatation pry are connected through the water outlet of the buffering sedimentation pry and the water inlet of the air-floatation pry; the air-floatation pry and the filtering pry are connected through the water outlet of the air-floatation pry and the water inlet of the filtering pry; the pries are connected through pipelines; all the devices, pipelines, valves, meters and control systems are integrated on the pries, and are fixed by a steel structure and a platform. According to the invention, the treatment pries are connected through quick connectors, are convenient and fast to disassemble and assemble, and can be flexibly arranged according to the treatment site situation; the skid-mounted device is high in integration degree, compact in structure, small in occupied area, high in automation degree, simple to operate, reliable in performance, convenient to construct, short in period, stable to operate and efficient in treatment, is integrally prefabricated in a skid-mounted manner, and can implement vehicle-mounted mobile operation; the water quality of effluent treated by the device can reach a reinjection water standard.

Description

technical field [0001] The invention belongs to the technical field of oilfield wastewater treatment, and in particular relates to a skid-mounted device and a treatment method for circulating treatment of oilfield well flushing and flowback fluid. Background technique [0002] Oilfield water injection wells must be cleaned regularly, which is one of the important measures to maintain the water absorption of the formation, improve the water injection effect, and reduce the pollution of the oil layer. Pollutants such as pollutants are very large pollution sources, and must be treated to meet standards before they can be discharged or reinjected. [0003] The treatment of well flushing and flowback fluid has the characteristics of scattered distribution of water injection wells in oilfields, poor road conditions at oilfield well sites, inconvenient access to large equipment, complex components of well flushing and flowback fluid, and large instantaneous water output. At presen...

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Problems solved by technology

[0005] Aiming at the characteristics of oilfield flushing and flowback liquid discharge, and the shortcomings of existing processing devices and methods, the present invention provides a skid-mounted high-efficiency processing device, which can effectively remove suspended matter in the flowback liquid generated during oilfield well flushing operations , oil, sand and other pollutants, reliable performance, high degree of automation, efficient treatment, water quality after treatment can reach the standard of reinjection water, reinjection into water injection wells, and realize circular well washing; and all equipment, pipelines, Instruments, valves and control systems are integrated on the skid, the whole skid is prefabricated, the construction is convenient, the integration is high, the structure is compact, and the floor space is small, which realizes the intensification, miniaturization and skid installation of the oilfield flushing and flowback fluid treatment device It solves the problems of long construction period, scattered equipment, large floor area, low degree of automation, and substandard water quality in the existing technology.

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