Application of Logistic curve in the water-cut mode of Weizhou Oilfields

Study on water-cut increasing law was important in oilfield dynamic analysis and logistic grow th curve was used to present this law.Three kinds of curve shapes of water-cut mode was characterized uniformly in this paper.The water-cut mode in different producing layers in Weizhou oilfields was established.It was found that the water-cut increasing curve of oilfields with the main producing layers of Weizhou group was a convex shape, oilfields with the main producing layers of Jiaowei group was a "S" shape, while water-cut curve of oilfields with the Liushagang group as main producing layers was a concave shape.Application of the typical watercut mode of Weizhou oilfields was applied to different producing formation oilfields, and combined with regional production planning, the water production of Weizhou oilfields was forecasted which was the base of construction planning of water treatment equipment. The method was useful for oilfield production management and regional production planning.