Effect of polymer-containing oil sludge on stability and properties of crude oil

Key words:  polymer-containing oil sludge  offshore oilfield  crude oil properties  dispersion stability concentration  oil sludge treatment

Abstract:

The case of polymer-containing oil sludge in Bohai Oilfield was studied. The oil sludge was mixed with dehydrated crude oil, which was transported by submarine pipeline to land to investigate the issue of the oil sludge treatment. And the feasibility of this method was verified through experiments. The particle size, Zeta potential, and conductivity, as well as the natural precipitation of oil emulsion were determined to characterize the dispersion stability of polymer-containing oil sludge in crude oil. The effects of oil sludge on the properties of crude oil and the distillates were analyzed. The results indicate that the maximum permissible concentration of polymer-containing oil sludge is 0.5％, at which the oil sludge does not precipitate in transporting. The viscosity of crude oil reduces after oil sludge addition, through which the liquidity is enhanced. The yield of vacuum residue is increased by 15％. And the ductility of the residue at 15℃ is longer than 150 cm, which means the low temperature performance is improved. And this favors producing heavy duty road asphalt using in low temperature areas.