Based on the further study on pressure transient testing theory in various formation, the paper drew up 80 pieces of normalized graph. By combing the pressure log-log curve and semi-log pressure curve, the graphs use brief words to describe the flow characteristics by segments. 112 field testing examples optimized from 10 large and middle scale oil and gas fields in China are given to do compare explaination.( This paper will introduce partly) Among the 80 normalized graph, 49 graphs aimed at homogeneous formation and give out a "Location analysis method". So the homogeneous model is classified by figure parameter CDe2S and positional parameter kh/µC and result in a classified table. From the table, we can easily find the law of radial flow section apparence from the testing information in order to improve the quality of well testing. The other normalized graphs are aimed at the double porosity model, fractured formation model, boundary interference model, composite system, partial penetration formation and stimulated formation. By using this graphic analysis method, the geologists and reservoir engineers can get a visable and clear physics concept related to the formation characteristics. By combining the well testing information and geology, geophysics, well logging and well completion information, the paper will be a great help in improving the well testing interpretation quality and the application level of well testing information in oil and gas engineering.

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