Real-time monitoring device and method for multifunctional corrosion in oil-water separation tank

Abstract

The invention discloses a real-time monitoring device and method for multifunctional corrosion in an oil-water separation tank. The device comprises a floating platform and a remote monitoring room, the floating platform comprises an air bag, a frame and flat plates, the air bag is embedded in the frame, and the upper end surface and the lower end surface of the frame are both provided with one flat plate; four sample leg frames are installed at the four corners of the floating platform, and four layers of sample hanging pieces are hung on each sample leg frame; a pH value probe, a temperatureprobe, a corrosion speed probe and a Cl- concentration probe, a voltage probe and a current density probe are installed on the flat plate on the lower portion of the floating platform; a gas monitor,a wireless emitter and a storage battery pack are installed on the upper portion of the floating platform; the remote monitoring room is provided with a wireless receiver, and the wireless receiver is connected with a computer through a data line. By means of the device and method, change and corrosion conditions of a medium in the tank and the dissolving degree and protection effects of sacrificial anode blocks for cathode protection can be reflected in real time, then the situation that a tank body fails too early or even storage tank leakage accidents happen can be effectively prevented, and the burden of workers can be greatly reduced.

Description

technical field [0001] The invention relates to the field of monitoring devices in storage tanks, in particular to a multifunctional real-time corrosion monitoring device and method in an oil-water separation tank. Background technique [0002] After decades of development, major oilfields in China have entered the development stage of high water cut or even extremely high water cut, and the comprehensive water content of the produced fluid is even as high as 90%. Due to the high salinity of the produced water, the high content of chloride ions, and the presence of microorganisms such as carbon dioxide, hydrogen sulfide, sediment, and sulfate-reducing bacteria, coupled with the interaction of high water temperature, flow velocity, and flow state changes, the oil-water separation tank Severe corrosion caused by the inner wall has increasingly become one of the main factors restricting the safe production of oil fields. At the same time, most oilfields generally adopt multi-l...

AI Technical Summary

Problems solved by technology

Its disadvantages are: first, it needs to stop production, which affects the normal production of the oil field; second, it needs to clear the tank, requiring the tank to be clean without remaining oil, water, mud and other sundries, and the workload is heavy; third, the delay of monitoring, It cannot reflect in real time the thinning of the inner wall of the separation tank, the corrosiveness of the medium, the protection effect of the sacrificial anode block and whether its size has reached a critical point

Under such service conditions, the inner wall of the tank is still severely corroded, and has not been discovered and repaired in time, resulting in premature failure of the separation tank

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