钻孔中水层探测方法研究

Research on Water Aquifer Prospecting Method in Drilling Hole

摘要: 地球物理测井是在钻孔中对油气层和水层进行探测，以确定油气层、水层的位置和含油饱和度，在测井曲线上，油层和水层具有不同的特征。在水文地质研究中和煤田水防治作业中，利用测井资料确定水层位置以及水层的分布范围，避免透水事故的发生。本文通过自然伽马、自然电位曲线、电阻率曲线、补偿中子曲线等常规测井曲线在不同地层的特征，为煤田开采区地层岩性的确定以及水层的分布提供一个极其有效的方法，最后提供了核磁共振仪器在水层探测中的特征以及探测机理，利用常规测井方法和核磁共振测井在煤田水文地质研究中具有极其重要的作用。

Abstract: Geophysical well-logging plays important roles for prospecting the oil saturation and the depth of oil & gas stratification and water aquifer during drilling a hole. Well-logging curves have different characters in oil & gas formation and water aquifer. The well-logging data are used for determina-tion of water aquifer, the study of hydrogeology and the operation of waterproof in coal field to avoid water breakthrough. In this paper, the characteristics of conventional logging curves such as natural gamma, spontaneous potential curve, resistivity curve and compensated neutron curve in different stratifications provide an effective method for determination of formation lithology and the distribution of water aquifer in coal field. Finally, the detection characteristics and mechanism of nuclear magnetic resonance (NMR) instrument used in water layer are provided. The use of conventional logging methods and nuclear magnetic resonance logging plays an important role in the study of hydrogeology in coal fields.