录井曲线的沉积微相识别

Sedimentary Microfacies Recognition from Logging Curve

摘要: 根据沉积微相和沉积相预测有利相带是勘探中常用的方法，利用录井资料识别沉积微相，有利于快速找到勘探目标。通过校正气测、钻时等录井曲线，采用反推方法，从岩心相–测井相反推到录井相，确定了沉积微相录井识别图版。研究表明，钻时、气测等录井曲线对纯度较高的砂岩、泥岩及煤层识别较为准确，能够反映岩石组合特征及沉积微相的变化，指导勘探开发工作的有效推进。

Abstract: Predicting favorable facies belts according to the sedimentary microfacies and sedimentary facies was a commonly used method in exploration, and identifying the sedimentary microfacies based on logging data was helpful for finding the exploration target quickly. By calibrating the gas logging, drilling time and other logging curves, the mud logging facies was obtained from core facies- logging facies with the reverse method, and the sedimentary microfacies logging identification chart was established. The results show that the logging curves of drilling-time and gas logging are more accurate in identifying sandstone, mudstone and coal seam with higher purity degree, which can reflect the characteristics of rock assemblage and the changes of sedimentary microfacies, and guide the exploration and development work effectively.