摘 要：科氏質(zhì)量流量計是一種多功能儀表，在液體計量方面有著廣泛的應(yīng)用前景。本文從其工作原理出發(fā)，建立了科氏質(zhì)量流量計的直接測量參數(shù)與間接測量參數(shù)之間的關(guān)系模型，分析了其間接測量的不確定度，提出了采用科氏質(zhì)量流量計和低含水分析儀構(gòu)成原油外輸動態(tài)油量自動計量系統(tǒng)。計算表明，該自動計量系統(tǒng)具有較高的測量精度，可滿足原油外輸計量精度的要求，為外輸原油自動計量方式的正確、合理選擇提供了理論依據(jù)

關(guān)鍵詞：自動計量;密度;質(zhì)量流量;含水率;計量精度

The Application of Coriolis Mass Flow Meterin automatic Measurement of Transporting Crude Oil Liu Zhicheng, Chen Xiangguang

Abstract：Coriolis mass flow meter is a multi-function measurement instrument; it will be widely applied in liquid measurement field. The working principle of Coriolis mass flow meter was analyzed, and the relationship model between direct measurement parameters and the indirect measurement parameters was built. The uncertainty of the indirect measurement parameters was analyzed; the automatic measuring system for dynamic quantity of crude oil that employs a Coriolis mass flow meter and an analysis instrument for low water content ratio was presented. The calculation results show that the system can achieve higher measurement precision and accord with the requirement of automatic and accurate measurement of transporting crude oil, providing the principle basis for reasonable and optimal selection of automatic measuring method for transporting crude oil.

Keywords：Automatic, Computation, Density, Quality Flux of Oil, Water Content Ratio, Measuring Precision

1 引言

外輸原油參數(shù)檢測與油量自動計量，為油田貿(mào)易結(jié)算工作提供現(xiàn)場數(shù)據(jù)，計量的準(zhǔn)確性直接關(guān)系到油田生產(chǎn)部門的經(jīng)濟(jì)利益和信譽(yù)，該項技術(shù)指標(biāo)一直受到了有關(guān)方面的高度重視。傳統(tǒng)的計量方式是體積流量計、密度計、原油含水分析儀組合在線測量法[1]。多年來，為了保證其計量的準(zhǔn)確性和可靠性，廣大科技工作者圍繞體積流量計的選型做了不少試驗研究工作，著重研究渦輪流量計、渦街流量計及腰輪流量計等，但其檢測效果仍不夠理想，其主要問題是上述幾類流量計的穩(wěn)定性較差，要求配備標(biāo)準(zhǔn)體積管標(biāo)定裝置，在現(xiàn)場對流量計進(jìn)行定期標(biāo)定[2]。雖然，計量的準(zhǔn)確性和可靠性提高了，但投資和運行成本也明顯增加。近年來，隨著信息獲取和處理技術(shù)的發(fā)展，科氏質(zhì)量流量計的準(zhǔn)確性、穩(wěn)定性及可靠性也隨之提高[3-5]。由于科氏質(zhì)量流量計可以在線測量原油（混合液）的質(zhì)量流量、密度及溫度，并由此可計算出純油的質(zhì)量流量、水的質(zhì)量流量、含水率等參數(shù)[6-7]。然而，單獨將該儀表用于外輸原油計量時，仍存在較大的誤差。本文通過分析科氏質(zhì)量流量計的測量原理,建立直接測量參數(shù)和間接測量參數(shù)與測量不確定度的定量關(guān)系，提出了改善外輸原油自動計量精度的可行方案。

詳情請點擊：科氏質(zhì)量流量計在外輸原油自動計量中的應(yīng)用