A device and evaluation method for evaluating the CO2 flooding produced water treatment method

Abstract

The invention discloses a CO 2 The device and evaluation method for evaluating the treatment method of flooding and produced water include a main box of a test device, and a plurality of hollow aeration test columns are arranged in the main box of the test device. The top of the aeration test column is provided with a water inlet, and the bottom is There is a sewage sampling port, an electromagnetic coil is wound on the surface of the outer wall, and an aeration head is arranged at the bottom of the interior; a detection module and a calculation module are also included, the detection module is connected to the sewage sampling port; the calculation module is electrically connected to the detection module. The device has the characteristics of high flexibility, small footprint, good anti-scaling and anti-corrosion treatment effects, etc., and can effectively evaluate the impact of four methods: pure aeration, pure magnetization, first magnetization followed by aeration, and first aeration followed by magnetization. 2 Oil removal, scale removal and corrosion control treatment effect of flooding produced water.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method of using frequency conversion electromagnetic magnetization and aeration as CO 2 The treatment method of produced water from flooding and the device for evaluating the treatment method, as well as the device for CO 2 A method for evaluating the results of flooding and produced water treatment. Background technique [0002] During oil field development, different oil displacement methods such as water flooding, polymer flooding, and ASP flooding are used for oil displacement. Specifically, oil displacement is: injecting water and oil displacement agent into the ground through the injection well. Since the oil displacement agent can improve the thickening ability of crude oil and reduce the interfacial tension of crude oil, it has the ability to wash oil, thereby dissolving the crude oil in the formation. ,carry. In this process, the oil-displacing agent and cru...

AI Technical Summary

Problems solved by technology

[0005] However, at present, there is no treatment system dedicated to the produced water of carbon dioxide flooding in oilfields. The produced water from carbon dioxide flooding is mixed with the produced water from water flooding and then treated by the water flooding produced water treatment system

For the water flooding produced water treatment system, this is equivalent to increasing the carbon dioxide content in the water flooding produced water, which will lead to frequent scaling and corrosion under the scale of the treatment equipment, which in turn will cause a large number of pipelines and water treatment equipment for produced water. Corrosion and perforation, can not be used normally

It can be seen that the original water flooding equipment can no longer adapt to the carbon dioxide flooding produced water in terms of scaling and corrosion.

In addition, the treatment system of conventional water flooding produced water occupies a large area, and the treatment process (natural settlement + coagulation settlement + quartz sand filtration and other physical methods and / or chemical methods such as scale inhibitors and corrosion inhibitors) has poor flexibility , Corrosion control and descaling effects are poor, and the cost of chemicals is high. After use, it may cause secondary pollution to the surrounding environment. It is difficult to meet normal production and environmental protection requirements such as oilfield anti-scaling, corrosion control, and reducing the frequency of equipment and pipeline replacement.

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