The Experimental Research On Oil Properties Test And Dehydration Of The Six Blocks Of Halahatang

District 6 in Tarim oilfield Halahatang is one of the country’s important oilfield experimental development,which is a special case,mainly produce heavy oil in the northern part and thin oil in the south.In order to guarantee high efficiency and low cost of exploitation, at the same time lay a solid foundation for the ground construction engineering design work, the paper studied the crude oil properties testing and dewatering technology.With deep investigation,field sampling, laboratory tests the physical properties of crude oil in this area, mainly include: crude oil density, viscosity, freezing point,the apparent viscosity-temperature curve, the aqueous phase inversion point of crude oil, the hydrogen sulfide content. Test on nature of crude provide an effective reference to the selection methods of demulsifier and dewatering. It describes the preparation of the crude oil emulsion, according to the physical properties of crude oil and produced fluid characteristics to choose the best demulsifier TA209,JFO913.And in order to test accuracy by additional testing to further screening demulsifiers,come to the conclusion that thin oil use the demulsifier TA405, heavy oil use the demulsifier TA406,two-phase oil use the demulsifier JFO417.Through two-phase thermochemical dehydration test,two-phase complementary experiments thermochemical dehydration and mixed thermochemical dehydration test, tested in different experimental conditions of district 6 oil sample,settled the dehydration time, dehydration temperature, dosage of boundary conditions.The paper targeted the dehydration process and determine the appropriate parameters, and made the best of crude oil dehydration process.