Distinguishing igneous rock lithology by logging data

We have studied deep well logging data, logging data,core and cutting analysis data of 27 wells in Daqing area, and summarized response law of every litholigy of igneous rock. Using interpretation chart which has good effectiveness in distinguishing igneous rock lithology, and compiling distinguishing program, the paper uses several well parameters to distinguish lithology comprehensively. The instance interpretation and comparing with core analyzing data show that this method has obtained satisfying result in distinguishing igneous rock lithology, the coincidence is above 85%.