Research On The Remaining Oil Distribution And Further Development Of Duanxi Gaotaizi In Beiyi Area

After thirty years water-flooding extraction, Gaotaizi of Duanxi in Beiyi Sazhong development area has entered the stage of extra-high-water-cut mining, block structure is complex, only develop highâ… -â…¡series of strata in the west and develop highâ… - â…£ four series of strata in the east. The two regions develop imbalance, many sets of well coexistence, block plane contradiction is very outstanding. Vertically reservoir exist single layer or multi-layer onrush contradiction,inefficient Wells and casing damage exist, which lead to regional water cut rising speed and natural decline further.The paper base on the reservoir finely description of Gaotaizi of Duanxi in Beiyi area, through the analysis of the fault earthquake, reservoir fine description and stratified analysis of remaining oil, systems analysis of block reservoir characteristics, reserve steps and residual oil distribution regularities, further provide technical support to oil field for the next step of work deployment.In this paper, the main conclusion are sedimentary unit, different physical condition of sedimentary facies and reservoir using character description.Combination of oil saturation and its mean square error analysis method in numerical way, describes the characteristics of sedimentary units of oil saturation distribution. Remaining geological reserves to get quantitative classification structure and distribution, reservoir remaining oil enrichment of relatively thin difference, such as Gâ… 23 thereof frontal sedimentary sand body types of units, while better sand body distribution, due to the poor physical properties, the mathematical model indicates that the potentialities and room for larger; Bypass line parts there are some remaining oil, such as Gâ… 8 unit of sand body development, injection-production well pattern analysis, reservoir in the mainstream line parts used in pairs are relatively low, the relative enrichment of remaining oil potential; Affected by pinchout keep out, resulting i n flood to the formation of remaining oil, such as Gâ…¡5 unit plane at larger scale, due to the blocking effect by injection-production by effect is poor, oil and water Wells affecting reservoir, formation of remaining oil.