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This book is intended mechanisms and causes of abnormal pressure distribution of a detailed study of the geological and geophysical parameters under different genetic mechanisms of response characteristics of geological logging data response characteristics of drilling engineering parameters and drilling parameters to establish a system response characteristics of abnormal pressure while drilling prediction basic theory put forward a series of new pressure cap pressure distribution method based on the pressure transition zone from three aspects of abnormal pressure while drilling conducted in-depth study of prediction methods and establish abnormal pressure while drilling technology series forecasting procedures and evaluation of abnormal pressure while drilling monitoring methods were studied systematically