Experimental Study of High Temperature Profile Control Agent for Oily Sludge

Abstract

Oily sludge mainly comes from well site and precipitation tank in gathering point. It is very harmful to oilfield environment and has been a problem of oilfields for a long time. On the base of analyses of the composition solid content of oily sludge in Shengli oilfield, a profile control agent has been developed. Plugging property evaluation experiment showed that this kind of profile control agent possessed core plugging ratio above 99 percent and breakthrough pressure above 10 MPa. So it has higher plugging strength. Parallel core experiment showed that most of the profile control agent is injected into the high permeability zone, for the reservoir whose permeability contrast is above 7, and the harm of profile control agent to low permeability zone is below 15 percent. This oily sludge profile control agent can be used in profile controlling of waterflood input well and steam blocking of thermal production well, this technology will have a good effect in field application.