With some measures to increase production being adopted, the density and viscosity of the crude oil as well as the polymer content have been increased, leading to increasing difficulty in crude oil dehydration and waste wa- ter treatment.

The reconstruction of crude oil dehydration unit in Shanshan oil field is outlined.

This increases the equipment working load,consumes much more chemical dehydrite,and increases crude dehydration material cost.

Studies the effects of the magnetic treatment on dehydration of crude oil,wax avoid ance and viscosity reduction,and purification of waste water and avoidance of scale formation.

Study of characteristics of crude oil dewatering process in joint station;