The Design Of The Intelligent Metering System Of Oil And Gas

With the rapid development of industrial production and transportation, theproductive value and strategic significance of petroleum, which is one of theworld’s most important energy, have become more and more prominent. Asmetering data is the basis for all data, the improvement of the meteringtechnology in terms of accuracy, applied in all links of petroleum exploitation, isparticularly important. However the traditional metering methods are mainlymanual metering methods, with the characters of interference and low accuracy,which can’t meet the need of production. So in this paper, the author establisheda intelligent metering system of oil and gas according to the situation that currentmeasurements are complicated and imprecise in most of the oil fields, andimproved it in terms of efficiency, accuracy and automaticity.In this paper, the author firstly expounded the principle of oil and gasmetering, analyzed the structure and principle of oil and gas metering separator,introduced and compared the common method of oil and gas measurement byliquidometer with measurement by aerometry, confirmed the volume meteringmethod based on magnetic level gauge; the author also introduced the principleof magnetic level gauge, improved it by realization of intelligent reading ofliquid level data by transmission electrical signals converted from liquid leveldata by liquid level sensor, and described the calculated method of oil metering.Secondly, the author confirmed the overall design of system: selected embeddedsystem ARM as the main controller; selected the flameproof temperaturetransmitter GWD120, the flameproof pressure transmitter BST6600-FB and theliquid level transmitter UQK-85as mode of analog acquisition, which played arole of explosion-proof safety under the condition of satisfied technicalparameters; and selected agreements RS485and MODBUS as the mediumcommunicated remote controller with host computer. The author also confirmed the hardware design of system: modular each part of the circuit, and designhuman-computer interface for all links of oil and gas metering to realizeautomaticity. Finally, the author conducted a metering experiment of a well,collected and calculated multiple sets of data, and analyzed the result ofexperiment and errors in it.Based on the existing oil and gas metering technology, the author improvedthe design to make a stable, accurate and intelligent metering of oil and gas cometrue. The research in this paper has practical value in the field of oil and gasmetering.