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。
Therefore, a method, which determines the resistivity of formation water in flooded layers with SP log, is given in this paper.
自然电位测井是油层水淹后能够有效识别地层混合液电阻率信息的测井方法。
SP logging is one of logging methods which can effectively distinguish resistivity of mixed liquid in formation after oil layer being water flooding.
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。
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.
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