A Study On The Designment And Application Of Multilevel Deep Profile Control In F Area Of Offshore Oilfield

Separated layer water flooding and profile control have been carried out in order to solve the problems of fast rising about water cut in recent years in offshore oil fields,but accompany by the development geological conditions are more complex,the profile control effect becomes worse,reservoir heterogeneity and which lead to the water channeling phenomenon are more seriously,so it is urgently to study the silent profile control technology which is more suitable for offshore oilfield features,high efficiency,low cost and simple construction.In view of the contradiction between injection performance and plugging performance of profile control agent,combined with reservoir characteristics and development characteristics of offshore oilfield,multi-stage combined deep profile control technology is raised.The PI decision technology is used to screen and evaluate the target area of the field test in this paper,evaluate the suitable gel formulation and particle size matching microspheres,determinate the combination way of the grading control system,and optimize the injection parameters.The technology uses the profile system size control technology to realize profile control agent size and reservoir pore throat radius and distribution,regulation of profile control agent into the contradiction between the performance and the sealing performance,which can improve the effective utilization rate of profile control agent,achieve the purpose of stable production and water control,and reduce the profile control agent of low permeability the reservoir pollution,can also affect the completion of offshore oil field weakening shear profile control agent.The construction process is easy to be implemented in offshore oil field,that will provide technical guarantee for the stable production of offshore oil field.