利用双自然电位测井研究水淹层测井解释

Log Interpretation for Water Flooded Zones Using Dual Spontaneous Potential Log

自然电位的形成与地层水矿化度和钻井液滤液矿化度密切相关。非盐膏地区自然电位的变化幅度明显,在同一口井内,通过改变钻井液滤液的矿化度,可测得2条幅度不同的自然电位,从而建立联立方程,解决油田在注水开发阶段,混合地层水电阻率的确定,继而准确确定剩余油饱和度,判断地层水淹程度,并为解释水淹层奠定了基础。

The spontaneous potential is closely related to salinity in formation and mud filtrate. In non-salt region, the spontaneous potential has obvious amplitude. In a well, two spontaneous potential curves can be got by changing the salinity in mud,equations is built to solve the problem about resistivity of mixed formation water, then this will lay the foundation of determining the residual oil saturation and discriminating the degree of water-flooded.