Study On The Rule Of Water And And Its Countermeasures In Mu 34 Oilfield

Mu 34 oilfield is located in the southwest of the northern Shanxi slope of the Ordos Basin,Is an edge water oilfield controlled by tectonic and lithologic.The oilfield gradually exposed the active edge water,fast rising of water content,frequent formation blockage,reservoir descent,development situation deteriorated and so on.In order to maintain the efficient development of oil fields,this article carried out the study of water breakthought rules and governance countermeasures.Based on the results of geological research,the mathematical statistics,dynamic analysis method,reservoir engineering method,seepage mechanics and other methods were used to analyze the water breakthought rules and the prediction of water rise in reservoir,the uplift speed of oil-water interface.And through the reservoir geological modeling and numerical simulation to develop suitable for this area of governance countermeasures.The study of water breakthought law shows that the Mu 34 oilfield had the law of change from low water to high water with from the central part of the work area to the edge of the work area,the structure of high partsto low structure;The water direction was ring-shaped,from the edge of the work area to the middle of the work area;The main water type was edge water(43.4%),interlayer water(32.9%);The water intensity of the reservoir is controlled by the tectonic,oil-water distribution,oil saturation,intercalation;At present,the reservoir is in the water stage of the rapid rise of water,and the average oil-water interface uplift velocity is 0.45 m / a.The oil-water interface of the reservoir is not uniformly uplifted,and the uplift rate increases with the development time.Through the numerical simulation analysis,the treatment measures such as shutting down,blocking,plugging and so on are put forward,and the parameters such as water injection intensity,hydraulic strength,injection / production ratio and oil recovery rate are optimized.The results show that the reasonable water injection intensity 3,the reasonable liquid strength is 0.75,the reasonable oil recovery intensity is 1.3,the reasonable injection and production ratio is 0.42.