In a water flooded sandstone oilfield, keeping a reasonable formation pressure is important for both the development effect and the total development benefit.
对于注水开发砂岩油田，保持合理的地层压力既关系到油田开发效果，又影响到油田开发总体效益。
Therefore, a method, which determines the resistivity of formation water in flooded layers with SP log, is given in this paper.
为解决这一问题，提出了一种利用自然电位(SP)曲线直接求水淹层内地层水电阻率的方法。
The flooded strata are often wrongly interpreted as oil layers by use of conventional log interpretation, mainly due to the formation water resistivity can not be determined accurately.
利用常规测井解释方法，往往把水淹层解释为油层，这主要是由于水淹层内的地层水电阻率求不准。
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