Study On Water Channeling Mechanism And Residual Oil In Shajiagou Reservoir

The stratigraphic,structural,sedimentary and reservoir physical characteristics of Shajiagou research area are re-evaluated and recognized on the base of the development of Shajiagou Oilfield,which is also relied on existing reservoir geological data,single well production performance data,dynamic monitoring data,fracturing data and so on.The result deepens the geological recognition and defines the favorable geological structure area of Shajiagou reservoir.At the same time,combined with geological knowledge,the production and development dynamics of Shajiagou research area were further analyzed and evaluated,and the oil production,water production law,water cut change,water flooding and well spacing characteristics of the study area were found out.In view of the serious water channeling of oil wells in Shajiagou research area at present,the characteristics of single well flooding are counted,and the well group units with serious water channeling are identified.A three-dimensional geological model of Shajiagou reservoir is established by combining reservoir engineering with geological modeling,and the characteristics of water channeling well group and the influencing factors of water channeling are analyzed.Finally,the distribution characteristics of remaining oil in the study area are described and displayed intuitively by using the method of modeling,and the factors affecting the remaining oil in the study area are analyzed from the aspects of geological factors and development factors.The key potential areas of remaining oil are identified,which provides the basis for the efficient development of the next oilfield.