The invention discloses a
logging-information-based complex
lithology identification method and
system. The method comprises the following steps that a plurality of
logging characteristic values of template
lithology are determined according to core data and
logging information, and a minimum value and a maximum value of each logging characteristic value of the template
lithology are further determined; normalization is carried out on the minimum value and the maximum value of each logging characteristic value of the template lithology to obtain the normalized minimum values and maximum valuesof the logging characteristic values of the template lithology, and the normalized template lithology logging characteristic value minimum value and maximum value characteristic graphs are drawn in the same plate, and a lithology
identification plate is obtained; and a normalized unknown lithology logging characteristic value is projected onto the lithology
identification plate, and lithology isidentified. According to the method, the logging information and the core data are used for determining the logging response characteristic value range of the lithology, then the identification plateis drawn, the lithology is identified, logging information is applied, the method is simple and fast and convenient, and the economic benefit of exploration and development is greatly improved.