Study On The Effect Of Oil Displacement Of The Characteristic Parameters Of Pore Structure Of Gaotaizi Reservoir In The Sazhong Development Area

In Sazhong development area after 40 years waterflood development, obtains the varying degree to use all kinds of reservoir. With the continuous improvement of the degree of water flooding, significant changes occurred in the physical properties of all types of reservoir, the formulation of development adjustment measures will have a certain impact, have summarized the impact factors in the main reservoir physical property changes in the stage of high water cut reservoir necessary, revealing the reservoir with water flooding development process change rules, provide the scientific basis for formulating the three oil and chemical profile control and adjustment measures plan. Gaotaizi reservoir development is facing with high water cut, high degree of recovery, high decline of the "three high" situation, in order to control the production decline rate, prolong the valid period of oilfield development, it is necessary to study a set of extra high water cut period of water flooding development rule, to the late development of the guidance of reservoir.Through the core physical experiments and special core experiments, given in Sazhong oilfield Sapu oil layer reservoir and pore structure characteristics, composition, mineral content of clay layer reservoir, starting pressure gradient, given Sapu oil layer and Gaotaizi reservoir cores of different permeability of the relative permeability curve and flow curve and water oil displacement law and capillary pressure curve, then summed up over a long period of water flooding in Sazhong development area, the core of the transverse and longitudinal changes and high permeability and low permeability core level difference, combined with the characteristics of relative permeability curve, draw the Gaotaizi reservoir has certain development potential in low permeability level. A comprehensive understanding of the development and sedimentary characteristics and development status of Gaotaizi reservoir, well pattern development present situation analysis, comparison of development effect, given the high water cut stage in Gaotaizi reservoir of Gaotaizi reservoir injection production system adjustment has little potential, to enhance oil recovery of water flooding effect is not obvious; well pattern is added to adjust the potential, later only through a comprehensive adjustment combined with the three oil development, can greatly enhance oil recovery.