Electric field regulating and controlling method for crude oil dehydration device

Abstract

The invention discloses an electric field regulating and controlling method for a crude oil dehydration device, which relates to a method for recovering an electric field to normal only by performing electrical property regulation on a crude oil emulsion in the electric dehydration device without changing a front section flow or a medicament. In the method, the change of the electrical property of the emulsion in the electric dehydration device is adjusted rapidly according to the change of a dielectric constant, an additive is regulated in time, a dielectric constant is recovered, the electric field is recovered, and the practical control requirement of electric field indexes in field production is met, so that normal running of the electric dehydration device is ensured, the water content of exported purified oil is up to or lower than an exportation standard, and the requirement of normal production is met. Meanwhile, control indexes can be provided for processes such as primary and secondary sedimentation at a front section, thermal sedimentation process and the like, and appropriate water content of crude oil containing emulsified water entering the electric dehydration device is ensured. The method is suitable for the technical field of chemical industry.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an electric field regulation method, in particular to an electric field regulation method of a crude oil dehydrator. Background technique [0002] After the crude oil is extracted from the formation, it must go through a complete set of gathering and transportation treatment procedures to make the water content meet the export standard before it can be transported. Therefore, the gathering and transportation treatment process is an important link in the oil extraction process. At present, the crude oil gathering and transportation process at home and abroad is basically the dehydration process of crude oil after the three-phase separator, the primary sedimentation, the secondary sedimentation, the thermal sedimentation, and the electric dehydration process. Depending on the degree of difficulty, each joint station of the oil production plant can selectively ...

AI Technical Summary

Problems solved by technology

There are also many basic theoretical studies on the coalescence of water droplets in the process of electric dehydration at home and abroad, mainly reflected in the fact that the coalescence force is proportional to the radius of the water droplets. It is related to the water content in the oil-water emulsion. When the water content in the emulsion is very low, the dipole coalescence value will be very small, and the dehydration efficiency will decrease instead. Therefore, when the electric dehydration process is used, it is not desirable that the water content is too small; , will cause the phenomenon of electric dispersion, one water droplet is dispersed into two smaller water droplets, and the purpose of dehydration of crude oil cannot be achieved