The left picture shows the application of Block 184 in Zhongyuan Oilfield. Because the backpressure was too high to enter the station, a total of 12 pumping Wells were collected and transported into two storage tanks to carry out oil transportation. In the figure, the liquid volume of two multifunctional medium-pressure tanks (1.6mpa) is 140m^3/d, and the comprehensive water cut is up to 85%.
       After the automatic separation device is installed, the pressure in the tank rises to 8kg, and the separated sewage is directly discharged into the backwater system (4kg). Only crude oil, emulsification layer and natural gas are left in the storage tank. At present, the water content in the tank is less than 4%, which greatly saves the transportation cost of oil tank truck.