Application Research on Drilling-Geophysical Logging for Geological Mapping of Overburden Area

Abstract:

Drilling is the most direct means to obtain deep geological information, which can identify the sequence of Quaternary strata, determine the depth and fluctuation of the top surface of the bedrock, verify the speculating model, study the geological structure, delineate the important contact relation between geological bodies and serve the geological mapping of overburden area. Geophysical logging is a scientific and effective means of well detection. Based on the characteristics of specific lithology or lithological association corresponding to specific logging parameter combination, the formation lithology can be identified, the depth and thickness of the stratum can be determined and the stratigraphy subdivision and correlation can be preceded by using logging parameters. The comprehensive utilization of drilling-geophysical logging technology will improve the exploration efficiency in overburden area and reduce exploration cost and provide technical support for the geological mapping of overburden area in the next step.