Preparation And Evaluation Of Oil-water Interface Horizontal Barriers System

Tahe oilfield is a high temperature and high salinity seam hole bottom water reservoir.Bottom water coning is one of the main reasons for decline in productivity.And between ways to control bottom water coning,the artificial partition technology is the most widely used.However,the high temperature and high salinity conditions in Tahe oilfield limit the segregation technology used in ordinary oilfields,Therefore,the development of a high temperature and high salinity resistance barrier system on the Tahe oil field mining has an important role.The paper first used Tahe crude oil and Tahe simulated formation water to prepare an emulsion.The emulsions of SDR-8 and SDR-12 are preferred from 18 kinds of emulsifiers,and the emulsions are better.But the emulsion emulsification time is too long,the emulsification process is difficult to control,operation is difficult.After further investigation,we chose two kind of materials—SDE resin and epoxy resin.It's found through experiments that,SDE system has good strength and toughness after modification.But SDE system has poor oil resistance at high temperatures,it can't exist for a long time at the oil-water interface.In contrast,epoxy resin system has good oilwater interface properties,it has good fluidity at room temperature after adding reactive diluent.After adding curing agent A,the curing time of epoxy resin system extends to 180 min at 140 °C,its compressive strength reaches 28 MPa and its breakthrough pressure reaches 15 MPa.Epoxy resin system is a kind of oil-water interface barrier with better comprehensive performance.