Complex Igneous Rock Lithologic Logging Recognition and Numerical Process of Logging Data

In combination with the study of deep natural gas exploration and development and geologic study in Songliao Basin,for the purpose of establishing an effective logging evaluation method and related means for Jurassic igneous rock reservoir study,methods for lithogical recognition by using main composition analysis and a crossplot are determined by studying rules of logging correspond of igneous rock lithology in Shengping-wangjiatuan and Changde area.Main composition analysis is used to perform a numerical process for the igneous rock interval in the area and its profile diagram is drawn out.The correct recognition of the lithology provides a foundation for the calculation of reserve parameters.Through studying of logging response rules,lithologic recognition methods are determined.An effective thickness criterion is established according to lithology and frame parameters are determined,by which a model for logging porosity and saturation is established,and logging evaluation method proper for complex lithologic logging is determined in the area.