Parameter Optimization for Water-bearing Crude Oil Transportation Between Treat-ment Stations
"Water separation station+dehydration station"is one of the widely used for produced liquid treatment modes in oilfields.To realize the overall energy saving of multiple stations,the overall optimization of the treatment stations and pipelines is needed.Based on the influence of crude oil tem-perature entering station on dehydration and transportation energy consumption,the calculation meth-od for heat energy loss of the water-bearing crude oil transportation is established.In the whole system of the water separation station,dehydration station,and pipeline,the energy consumption related to the water-bearing crude oil treatment and transportation is analyzed,and the influence of the water content and transmission temperature of the crude oil in water separation station on the system energy consumption is studied.The results show that as the water content of crude oil increases,the heat ener-gy loss during crude oil transportation first increases and then decreases,and the oil-water reverse phase point is the water-bearing condition with the highest heat energy loss.As the external transportation temperature increases,the heat energy loss of the water-bearing crude oil transportation increases.At low temperatures and with high water content,the heat energy loss of crude oil transportation is rela-tively low.As the water content of crude oil increases,the pressure drop,pressure energy loss,and comprehensive energy consumption of the crude oil transported from the water separation station in-crease first and then decrease,and increase again.There are two minimums of pressure drop,pressure energy loss,and comprehensive energy consumption with low and high water content.The compre-hensive energy consumption is the lowest at 70%water content.The transportation of crude oil from the water separation station with low water content,as well as high water content above the oil-water re-verse phase point,both can achieve the goal of energy saving and consumption reduction.When the expansion is limited or the transformation cost is high,the water separation station should use the for-mation heat energy for unheated oil-water separation,and the water content of crude oil should be higher than that of the oil-water reverse phase point.
crude oil transportationheat energypressure energywater contenttemperatureen-ergy saving and consumption reduction
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