The Study On 3D Geological Model And Remaining Oil Distribution In The Typical Block Of Fuyu Oilfield

Fuyu oilfield has been developing for nearly half a century.The water cut has reached more than 94% after many adjustments.While it entered the late stage of high water cut mining and faced severe development situation.Although the Fuyu oilfield in different periods different areas maked the unit of fine reservoir description.The reservoir fine description layer has been unable to meet the needs of oilfield development based currently.With the increasing number of new wells drilling in Yangdachengzi block,the reservoir and reservoir understanding deepening,the original research results need to adjust and improve.The distribution of remaining oil in high water cut development stage is very complex and highly dispersed.In addition,Fuyu oilfieled is in Songyuan city.With the development of urbanization in Songyuan,the reserves of 1/3 are difficult to tap by adjusting well and Nii deployment.This paper established the three-dimensional geological model of Fuyu oilfield typical block reservoir with numerical simulation integrated method which combined with dynamic and static data.It establishes five kinds of model,geological model,structure model,reservoir model,fluid model,dynamic model.The strecture characteristics,reservoir characteristics,characteristics fluid properties and regional development history of the research area in the form of specific data in each grid unit established,and make the model more in line with the actual situation through the history of dynamic data.And combined with the previous research results of sedimentary facies analysis of residual oil distribution.By recognizing the potential of the remaining oil,the use of research results and enrichment of the residual oil distribution in typical blocks in different simulated residual oil saturation distribution map.It is considered that micro structure,sedimentary microfacies,reservoir configuration,flow unit and the well pattern designs are the main controlling factors of the remaining oil distribution.With the idea of "analysis of the control of residual oil distribution by single main control factors and multi factor comprehensive analysis of residual oil distribution law",4 residual oil enrichment modes in typical blocks in Fuyu oilfield are summed up:(1)residual oil enrichment area controlled by microstructures;(2)residual oil enrichment area controlled by micro faults;(3)side accumulation of point dams The remaining oil enrichment area controlled by the body;(4)the remaining oil enrichment area controlled by injection and production in main channel.Combined with the study of sedimentary microfacies,micro structure,single sand body,flow unit and dynamic data analysis,3 horizontal wells have been deployed,and the potential of hole filling in the old wells are pointed out.Through the study of the geological model and the numerical simulation,the static understanding of the reservoir and the dynamic understanding of the distribution of residual oil provide a comprehensive method and technology for the adjustment of the well network deployment in the high water cut development period of Fuyu oil field,and potential digging of the potential of the old oil fields,which has a certain promotion significance.