This article introduces that the combination station of Chaheji oilfield Huabei,in the course of realizing closed gathering and treating, how to explor and improve automatic control of the parameters of pressure, liquid level and interface level etc in the oil-gas separation, settlement, dehydration and surge-attenuation etc links to make the whole system closed operation. This article introduces the new technology of the frequency control of motor,electrostatic shortwave oil-water interface level meter adopted in renewing automatic control system and automatic controlled single circuit adjustment.
