FeS Colloid Particle Formation and Impact on Union Station

Abstract

There was a large quantity of sulfate reducting bacteria (SRB) in crude oil, and the existence of the SRB could cause the reduction of S, forming S2- which could react with Fe in the pipes, storage tanks and other equipment. FeS could absorb colloid oil drops; the FeS colloid particle came into formation. The abundant existence of the FeS colloid in the oil-water surface transition layer generally caused the bad oil-water separation. The FeS colloid could attach on the panels of the electric dehydrator, it caused the increase of the conductibility between the panels, and even caused the breakdown of the electric field intensity, the electric dehydrator was out of work. After the formation mechanism analysis, the FeS colloid impact on the dissociated water, the dehydrator-water and the electric dehydrator had been studied. It came to the conclusion that when the FeS colloid particle concentration went beyond 30mg/L, there was FeS in the dissociated water; when the FeS colloid particle concentration went beyond 100mg/L, the electric intensity was lower than 500V/cm, the product oil contained more water than 0.3% standard.