Skid-mounted device for treating oil field fractured and acidized wastewater and treatment method

Abstract

The invention relates to a skid-mounted device for treating oil field fractured and acidized wastewater and a treatment method. The skid-mounted device is composed of three skid units including a primary air flotation skid unit, a microelectrolysis-secondary air flotation skid unit and a filtering skid unit. Facilities related to all the treatment skid units are fixed together with a platform through steel structures; the facilities are connected through pipelines with different specifications according to a process flow; and relevant instruments and control systems are integrated on a skid. As a whole, a water outlet of the primary air flotation skid unit is connected with a water inlet of the microelectrolysis-secondary air flotation skid unit; a water outlet of the microelectrolysis-secondary air flotation skid unit is connected with a water inlet of the filtering skid unit; and fast joints are used as joints and are connected through steel pipes or hoses. The skid-mounted device is capable of forming the skid as a whole, meeting different requirements of vehicle-mounted mobile operation and site setting treatment and effectively treating and recycling the fractured and acidized wastewater, compact in layout, small in floor area, high in treatment efficiency and stable in operation; and all the treatment skid units are high in site layout flexibility.

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 oilfield fracturing and acidification wastewater treatment. Background technique [0002] Fracturing and acidizing wastewater mainly refers to the flowback fluid produced during oilfield fracturing and acidizing operations, and its composition is closely related to the formula of fracturing fluid and acidizing fluid and the quality of formation water. Due to the different formations where the oil reservoirs are located, the water quality and composition of formation water are quite different. Therefore, the flowback fluid that is returned to the ground after fracturing and acidizing operations not only contains various chemical substances added to the fracturing fluid and acidizing fluid. , also contains a small amount of oil, formation water and components in the oil layer. It belongs to oilfield ...

AI Technical Summary

Problems solved by technology

However, the re-injection treatment process basically adopts the fixed station type, and the fracturing and acidification wastewater is transported from several miles or even hundreds of miles to the fixed station for centralized storage and treatment, and the treatment cost is high

At the same time, there are still problems such as long construction period, scattered equipment, large floor area, high operation and maintenance costs in fixed station processing, and further technical improvement is needed.

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