A Method for Measuring the Dynamic Liquid Level of Rod Pumped Oil Wells

Abstract

A dynamic liquid level measuring method of a sucker-rod pumping well comprises measuring the input power of a motor, the daily liquid production capacity of the sucker-rod pumping well, the oil pressure of a sucker-rod pumping well mouth, the casing pressure of the sucker-rod pumping well mouth, the stroke of a pumping unit, the jig frequency of the pumping unit, the average load of a polish rod during the upstroke of the pumping unit and the average load of the polish rod during the down stroke of the pumping unit during the oil pumping process. The method determines the relation between the spot actual oil lifting height and the effective power during the process of lifting the oil, and the relation between the dynamic liquid level of the sucker-rod pumping well and the spot actual oil lifting height, calculates the wasted power on the ground, the wasted power under the ground and the volume expansion power of the solution gas, obtains the effective power during the process of lifting the oil and obtains the spot actual oil lifting height and the dynamic liquid level of the sucker-rod pumping well. The method can achieve the online continuous measurement with low measuring cost and high security, and can finish the measurement without the field operation of operators.

Description

technical field [0001] The invention relates to the technical field of parameter measurement of rod pumped oil wells, in particular to a method for measuring the dynamic liquid level of rod pumped oil wells. Background technique [0002] In the early stage of oilfield development, the original pressure of the formation is used for self-spraying production. With the gradual consumption of formation energy, self-spraying production can no longer meet the needs of oilfield production. Artificial lift came into being. The purpose is to obtain a large bottom-hole production pressure difference , to ensure that the oil well has a higher production. Artificial lift technologies include rod pumps, electric submersible pumps, hydraulic pumps, and gas lift. Rod pump pumping technology is the earliest and most widely used artificial lift method. With the continuous development of technology, rod pump pumping equipment has been continuously improved. Among various artificial lift oil p...

AI Technical Summary

Problems solved by technology

The advantage of this technology is that the relative accuracy of the dynamic liquid level is relatively high, and the disadvantage is that real-time data cannot be obtained. Since the sound medium uses gunpowder bullets without bullets or nitrogen cylinder sound bombs, the work is dangerous, and the annual operating cost ( manpower, vehicles, bullets) is also not a small amount

[0007] 3. Electric air guns and electric nitrogen cylinders are installed on the oil well site, which achieves continuous online measurement. However, the equipment cost of tens of thousands of yuan for an oil well also makes it difficult for such technology to be widely used, and sounding equipment is prone to problems on site. The plan to speak once an hour sometimes does not come true

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