An oil well testing and control system

Abstract

The invention belongs to the technical field of test and control of oil wells, and particularly provides an oil well test and control system. The oil well test and control system at least comprises a metering tank for metering single-well produced liquid and an oil storage tank for storing the single-well produced liquid, wherein the single-well produced liquid firstly enters the metering tank; the metering tank is used for implementing analysis on a moisture content proportion of the single-well produced liquid in the tank and measurement on the weight of the produced liquid; when the single-well produced liquid in the metering tank reaches a set value, a control mechanism transfers the single-well produced liquid reaching the metering tank into the oil storage tank for one-time single-well produced liquid metering, so that the single-well produced liquid can be controlled to enter the cleaned metering tank, and such cycle repeats. Therefore the problems that the oil storage tank used for carrying out metering is inaccurate and is difficultly maintained, and particularly the large oil storage tank needs to be heated during metering as oil liquid is frozen in winter in the prior art are solved, and the produced liquid can be metered after a small container is heated. The oil well test and control system is convenient to mount, is higher in corrosion resistance and is low in manufacturing cost, and the technology is simple.

Description

technical field [0001] The invention belongs to the technical field of oil well testing and control, in particular to an oil well testing and control system, and relates to single well liquid production measurement, data transmission management and remote control of on-site equipment operation. Background technique [0002] The oil well test and control system is applied to the measurement of fluid production and real-time water cut measurement in medium and low-yield oilfields. At the same time, the measured data is transmitted to the oilfield monitoring room through the remote network at a set time interval, and receives the control of the oilfield monitoring room. Signal to control the stop and start of the pumping unit. [0003] At present, the oil well production measurement methods adopted by domestic oil fields mainly include the following: [0004] ●Horizontal elevated tank oil measurement method; [0005] ●Glass tube oil measuring method; [0006] ●Liquid level r...

AI Technical Summary

Problems solved by technology

[0011] The horizontal elevated tank oil measuring method and the glass tube oil measuring method are rarely used now because of the relatively primitive measurement methods, high labor intensity, low accuracy and poor reliability.

[0012] The liquid level recovery method and the dynamometer method, because these two measurement methods require a large amount of oil well production data, it is difficult for the computer to automatically identify the dynamometer diagram, and some empirical parameters are required, which has a large human factor, resulting in relatively large measurement errors. Large, the effect is not ideal

[0013] The traditional electrode liquid level oil metering method uses the measured liquid volume to convert the separator constant or the differential pressure liquid level conversion to obtain the liquid production density, thereby converting the liquid production volume, but due to the difference in the liquid production density Therefore, this method is not only labor-intensive and time-consuming, but also has a large error in the measurement of fluid production

[0014] At present, there are commonly used oil tank liquid level measurement methods. The disadvantages of this technology include: 1. The manual measuring method is labor-intensive and unsafe; The friction force of the mechanical counter is less reliable; ③, the measurement of the servo liquid level gauge is expensive, and cannot be applied in the oil field; ④, the measurement method of the magnetostrictive liquid level gauge is easy to be corroded by the measured liquid, and the density is easy to change Causes large measurement errors; ⑤ Others such as easy to get stuck when the float moves, strong overload capacity of differential pressure liquid level measurement, and ultrasonic liquid level measurement results are greatly affected by the environment

[0017] 1) The viscosity of crude oil varies with the seasons, especially in the northern winter when crude oil becomes lumpy, and the existing technology cannot accurately measure its liquid level

[0018] 2) The water content of crude oil changes with the production process, that is, the density of the liquid in the oil storage tank also changes accordingly. The original technology will produce large errors when measuring the weight of the liquid in the oil tank

[0019] 3) The shapes of oil well storage tanks are different, and the original technology has great shortcomings in measuring the weight of produced liquid

[0020] 4) The liquid level of the oil storage tank of the pumping well with medium and low yield changes slowly. Affected by the measurement accuracy, it is currently impossible to identify whether the oil well is producing liquid

[0021] 5) The original oil tank liquid level technology cannot measure the water content of the current oil well production fluid

[0022] 6) The original technology cannot accurately identify the historical records of the fluid production change of the oil well

[0023] 7) The instruments for water cut measurement are expensive, ranging from tens of thousands to hundreds of thousands, which is impossible for a single well with a large number of oil fields

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