CRUDE OIL DEHYDRATION AND DESALTING SYSTEM WITH A HIGHER GRAVITY THAN 10O API IN MIXING PIPELINES

摘要

A method for dehydrating and desalting anoil-in-water emulsion includes the steps of: injecting ademulsifier into the flow to destabilize the emulsion;injecting water to promote desalting; and passing theflow through a mixing pipeline having a length (L) andinside diameter (D) determined as follows:(see fig. I)(see fig. II)wherein:f - is a Fanning Friction factor~e - is a density of the emulsion (gm/cc);Qe - is a flow rate of the emulsion (bbl/day);µe - is a viscosity of the emulsion (poise);K - is an instrument constant of a dynamiccoalescer;F - is a rotational speed of the dynamiccoalescer (rpm);t - is a mixing time (hr);D - is the inside diameter of mixing pipeline(inches); andL - is the length of the mixing pipeline (km).