Oil field single-well metering device and method

Abstract

The invention provides an oil field single-well metering device and method. The oil field single-well metering device comprises a metering tank and an energy-storage tank which mutually communicate. Gas with the preset pressure is stored in the energy-storage tank, and a liquid inlet pipeline, a liquid level meter, a liquid outlet pipeline and a weighing module are arranged on the metering tank. An inlet valve is arranged on the liquid inlet pipeline, and an outlet control valve is arranged on the liquid outlet pipeline. A piston for cleaning the metering tank is further arranged in the metering tank, and the bottom of the metering tank is connected with a cleaning device which is used for injecting cleaning liquid in the metering tank. Through all embodiments of the oil field single-wellmetering device and method, the structure is simple, operation is convenient, oil field single-well metering is achieved under the situation that additional power is not needed, and the accuracy of the single-well metering result is improved.

Description

technical field [0001] The application belongs to the technical field of oilfield exploitation, and in particular relates to an oilfield single well metering device and a metering method. Background technique [0002] The fluid output of a single well is the basic data of oilfield development, and an important basis for development plan design and surface engineering construction. With the rolling development of oilfields, oil well measurement is becoming more and more difficult, coupled with the need for fine analysis of production and cost reduction and efficiency enhancement, the requirements for single well measurement technology are also increasing. Traditional metering methods can no longer adapt to the production requirements of single well fluid production and gas production in the oilfield production process, and it is difficult to achieve accurate metering requirements within a wide metering range. [0003] In the prior art, the single-well metering methods used i...

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Problems solved by technology

The traditional metering method can no longer meet the production requirements of each single well's liquid production and gas production in the oilfield production process, and it is difficult to achieve accurate metering requirements in a wide metering range

[0003] In the prior art, the single-well metering methods used in oil fields mainly include glass tube oil metering, single-well elevated tank oil metering, tipping bucket oil metering, liquid level recovery method, power map method, etc., but due to their respective technical principles, they are more or less Affected by certain factors and conditions, the measurement accuracy of oil products cannot be guaranteed, especially for the accurate measurement of heavy oil, which is difficult to effectively solve

Due to the low oil-gas ratio of heavy oil and low gas production, it is difficult to press the liquid level when measuring oil with glass tube, which makes it difficult to measure oil

The single-well elevated tank oil measurement method is prone to foam during the heating process, and the liquid level in the elevated tank changes greatly due to the influence of temperature, resulting in large measurement errors

Due to the high viscosity of thick oil and the serious wall hanging, the measurement accuracy of the tipping bucket is affected

The liquid level recovery method and the power map method need a large amount of oil well production data when measuring oil, and the working conditions of the oil well are in a state of constant change, and there are many factors affected by the downhole working conditions, resulting in large measurement errors

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