A Study On Deep Profile Of Ze70 High Temperature Block Reservoirs

Ze70block inHuabei Oilfield of Multilayer sandstone structure is a high temperature reservoir affected by lithology.Viscosity of crude oil larger,higher formation temperature,with the progress of exploitation,there is now a lot of problems.This paper systematically analyzes some of the well profile cases over the years been carried out due to flooding agent injected much faster than the speed of water injected,energy well enough over.The effect of profile control agent used is not good,low strength,poor heat resistance salt tolerance,fragile and lost.So the measure injection pressure decreased rapidly after each round profile corresponding to the increase in the amount of fluid production wells a short time,increase the amount of oil,but not long maintained,while there is a cross-sectional improve poor and water cut increase,with profile increase rounds,increasing oil deterioration and other issues;To solve these problems,this paper argues Ze 70 block from profile agent to profile the agent process can not meet current demand.So we must carry out comprehensive management proposed the development of new polymer gel,with high-intensity particles and surfactant,improved deep profile technology,improve the use of low-emission combined injection of polymers and other measures.Finally,choose a typical injection well in Ze 70 block,using the newly developed profile control agent,Measuring absorption profile shows: the goodphysical properties of the upper part of layer to get sealing,the poor lower strata have been started;The water cutof corresponding oil well group decreased from 78.4% measures prior to the current 68.5%,increasing oil 3.9t;after measures have reduced 63.6% compared with the previous measures injectivity index.Therefore,we believe that the profile system could solve the problems of Ze70 block,and for the future performed on the block profile has an extremely important guiding Meaning.