Research And Application Of Deep Profile Modification Technology In Haiwaihe Oilfield

Haiwaihe Oilfield is the ordinary heavy oil field water injection development,in view of the long-term waterflooding in reservoir heterogeneity and producing extent,improve the swept volume problem,carry out the deep profile modification technology in Haiwaihe Oilfield.Because of weak gel in porous media of drag coefficient is big,after the big hole,forcing the subsequent injection water redirection,so as to improve the sweep efficiency of the injected water and ultimate recovery.In view of the problems existing in the operation of deep profile modification technology in Haiwaihe Oilfield,to carry out the corresponding technology research.Through the analysis of overseas river reservoir conditions and process conditions,design a weak gel injection volume,injection speed,injection pressure,injection parameters,such as,and determined the basic formula.Poor summer gel for oil displacement of weak gel system,factors affecting gel experiment study,to establish the water quality recommendation,find the main control factors,and form a water purification,sterilization,in addition to the effect of oxygen formula optimization adjustment technology.In view of the conventional ground injection system device crude,shear viscosity large losses,innovation to improve process,improve liquor quality,reduce switch injection system of shear displacement system.Using the numerical simulation technology of profile modification injection parameter optimization design,calculate the optimal injection way for intermittent call flooding,and the slug size,stop time to optimize the design parameters,such as injection.In view of the middle and later periods of the profile modification effect of the variation phenomenon,to carry out the related replacement technology-agent polymer solution flooding,polymer solution agent at the same time possess the characteristics of polymer and surfactant in crude oil also has a good viscosity,dispersion,emulsification,ordinary heavy oil reservoir is suitable for the high viscosity of crude oil.