APPLIED RESEARCH OF OILY SLUDGE IN OILFIELD DEVELOPMENT

During production of an oilfield, the oily sludge settled at the bottom of the tank must be expelled. Because it is with great amount of slurry and oil,with high salinity, the oily sludge contaminates the environment seriously. This paper introduces a new technique,that is,change the oily sludge into a kind of viscous profile controlling agent through chemical treatment,and then use the agent to conduct profile control in high permeability injectors so as to plug the strong injectivity pore passages. Field application indicates:this technique is effective for increasing oil production and decreasing water output,and has better solved the problem of contamination and utilization of oily sludge. It has provided an economic and effective way for treating the contamination of oily sludge.