Working fluid level tester for oil production well

Abstract

The invention relates to a working fluid level tester for an oil production well. The tester comprises an infrasonic wave generating device, an echo receiving device, a display device and a control system. The sleeve depth, the sleeve height, the mining place temperature, the crude oil viscosity and the temperature in a sleeve of a pre-detected oil well are obtained, the factors are taken into consideration, and the mining grade of the pre-detected oil well is calculated. Meanwhile, the infrasonic wave frequency and the monitoring interval of the infrasonic wave generating device are adjustedin real time by adopting different standards according to the crude oil exploitation grade, the i monitored working fluid level height Bi and the height interval where the working fluid level height Bi is located, so that the situation that the oil well to be monitored is monitored in real time at the good infrasonic wave frequency, accurate and clear feedback data are obtained, the accuracy of a monitoring result is improved, meanwhile, the monitoring interval is automatically adjusted in real time, energy is saved, and the situation that the position of the working fluid level is captured in the whole monitoring process is guaranteed.

Description

technical field [0001] The field of the invention is the field of measuring instruments, specifically a dynamic liquid level tester for oil production wells. Background technique [0002] The dynamic liquid level is the liquid level in the annular space of the tubing and the casing when the pumping well is in normal production, and this liquid level is called the dynamic liquid level. The dynamic liquid level can be expressed by the depth from the wellhead, or by the height from the middle of the oil layer. In the process of oil well production, the maximization of production and comprehensive efficiency is the ultimate goal, and the liquid supply of the formation Capacity is the fundamental factor restricting the realization of this goal. The dynamic liquid level of an oil well is an important index reflecting the liquid supply capacity of the formation, and an important basis for determining a reasonable submergence degree and formulating a reasonable working system in th...

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Problems solved by technology

[0004] 1. Traditional testing instruments do not consider the influence of oil well casing temperature, oil well casing width, and oil well casing depth on the monitoring results;

[0005] 2. Traditional testing instruments use fixed monitoring intervals, monitoring frequencies, and monitoring parameters, resulting in some errors in monitoring results, weak signals at certain positions on the moving liquid surface, missing detection curves or interference with signals The problem;

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