王场油田水淹层测井识别与定量评价方法

王场油田不同储层水淹特征不一致。采用电阻率下降法、交会图版法、可动流体分析法定性识别水淹层,王场油田油层水淹后,以自然伽马曲线数值变低、声波时差增大、电阻率测井值降低、含油饱和度下降为主要特征。通过计算孔隙度、渗透率、剩余油饱和度等参数实现水淹层的定量解释与评价,对王场油田新钻7口井中的14层进行试油跟踪,经投产验证,解释符合率87.5%。

On Cognition of and Quantitative Evaluation on Flooded Layer Logging in Wangchang Oilfield

There are different flood characteristics in different reservoirs in Wangchang Oilfield. Such methods as re- sistivity descent, cross chart and movable fluid analysis are used to discern qualitatively flooded layers. Hooded res- ervoir in Wangchang Oilfield has such characteristics that natural gamma curve steps down; interval transit time in- creases; resistivity logging value decreases and oil saturation declines. This paper completes quantitative interpreta- tion and evaluation on the flooded layers based on computed parameters of porosity, permeability and surplus oil sat- u_ration and traces fourteen layers of newly drilled wells through oil testing. Field appfication proves that agreement rate of interpretation has reached 87.5 %.