A NEW METHOD FOR LOGGING DATA CORRECTION IN XIHU DEPRESSION OF EAST CHINA SEA BASIN

Logging detection is greatly influenced by well site environment, which includes drilling environment and detection environment. Drilling environment includes borehole diameter, drilling time, drilling fluid displacement, coring etc, while the detection environment is mainly the natural environment of well site and the internal environment of detector. Generally, the internal environment of the detector is basically the same, and the natural environment of the well site changes little in a certain period of time. Therefore, the drilling environment leaves a greater impact on logging detection. The drilling environment correction is an important task before logging interpretation. Conventional Tg correction method is poor in efficiency in coring and for low anomaly and multi-layered intervals. After analysis, the correction method is optimized in coring, drilling time, displacement, base value and other aspects. Practice proves that the new method has better effect and better adapts to the geological research needs in the Xihu Depression.