Detailing of the Igneous Rock Lithology in Wells – Logging Data from the Carboniferous, West Junggar Basin, China

Abstract

The carboniferous igneous rock in the west Junggar Basin mainly composed of tuff, andesite, basalt and volcanic breccia is very hard to exactly distinguish via geological logging. Based on logging data coupled with cores, logging cross plot, imaging logging and fisher discriminant was used to identify the lithology. The effect of cross plot is too confused to distinguish all the lithology. Imaging logging can effectively visualized divide four types of igneous rock, but time and human resources are essential. Fisher discriminant analysis can integrate several logging information and achieve auto identification, decreasing human resource cost and time consumption. With the combination of three methods, modified lithology section is more abundant in lithology and more accurate in lithology, depth and thickness. The new section can be well useful in reservoir research.