Method for accurately metering oil input of oil field united station

Abstract

The invention discloses a method for accurately metering oil input of an oil field united station, which is used for the metering of crude oil of the oil field united station. In the method, a differential pressure method is adopted, the temperature of a pressure pipe is kept equal to that of a sedimentation tank by arranging the pressure pipe inside and outside the tank, and all absolute oil and all water in an entire oil tank are considered as two wholes; a liquid level is supposed to be constant, only the variation of the absolute oil in the sedimentation tank is measured by using a dehydrator differential pressure metering device without measurement of the total amount of oil and water in the sedimentation tank. The method consists of a sedimentation tank differential pressure metering method, a buffer tank differential pressure metering method and a dehydrator differential pressure metering method or consists of a sedimentation tank differential pressure method, a buffer tank differential pressure method and a dehydrator differential pressure method and is implemented through a sedimentation tank differential pressure method device, a buffer tank differential pressure method device and a dehydrator differential pressure method device. The device consists of a differential pressure sensor, a pressure pipe, a liquid level meter, a computer, a multidirectional pressure valve, a multidirectional pressure valve seat and a multidirectional pressure valve faucet, wherein the differential pressure sensor is connected with the pressure pipe through a screw thread; the multidirectional pressure valve is connected with the pressure pipe through a screw thread; and the multidirectional pressure valve seat is in tolerance fit with the multidirectional pressure valve faucet. The method solves the problems of high labor intensity and big metering error existing in a conventional method and can be widely applied to crude oil metering operation of the oil field united station.

Description

Technical field: [0001] The invention relates to a high-precision measuring method for the oil inlet quantity of an oil field combined station used for measuring crude oil in an oil field combined station. Background technique: [0002] At present, crude oil measurement in oilfields mainly uses the process of calculating the daily crude oil production volume of oilfields based on the change of net oil volume in oil storage tanks of oilfield joint stations, which is called inventory. The accuracy of inventory directly affects the management and decision-making of oilfield production. The panel warehouse of the oilfield joint station has always used manual measurement, that is, the purified oil tank is manually measured, and the water content analysis is carried out in the laboratory. The settlement tank uses manual sampling to determine the oil-water boundary. The strength is high, and the measurement error is also large. The main reason is that the measurement accuracy of th...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-precision measurement method for the oil intake of an oil field combined station, which solves the problems of high labor intensity and large measurement errors in the existing methods in the prior art

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