| As a key datum in oil field producing and trading,water content ratio in crude oil is an important parameter of oil exploitation and oil chemical industry.Water content ratio plays an important role in dehydration,storage selling and petroleum refining.If an inaccurate measure of the water content is tested,it will affect directly on determination the water and oil layer's position,estimation oil yield,prediction the life of exploitation of the oil well and control the yield.This subject comes from Shengli Oilfield Hekou Oil Production factory and Shandong Xindatong Petroleum Environmental Technologies Inc.The measurement object of the research in this thesis is the transporting Crude Oil from gathering and transportation Station of Shengli Oilfield.On the basis of studying the domestic and international related documents,the existing several test methods of water content of crude oil are summarized and compared,besides,the basic principle,application,merits and shortcomings are analyzed.In order to make use of the in-use equipment and take into account the local production status,the subject chose the density method to achieve online real-time measurement of moisture content of crude oil.It used the static measurement method in the dynamic measurement to obtain real-time data.The measurement system which was brought about by this measurement method is effective and feasibl.According to the mathematical model formula,this thesis is based on the oil-water mixture's density tocalculate the water-rate in petroleum,carried on the error analysis to this measuring method,and bring some methods to minimize errors.Measuring device using PLC data acquisition system.this measuring device can carry out the dynamic real-time measurement,and measure the static measurement of the water-rate in crude oil.According to the experimental results,the error of this measurement system is less thaną5%,and the performance reaches the requirements. |
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