"Well test is a system engineering including well test design, pressure data acquisition and interpretation, and dynamic description of the oil/gas well and the oil/gas reservoir etc. This book combines all of these to illustrate the process and the methods of well test analysis, and provides a lot of field examples to validate them. This chapter introduces the parameters obtained from well test and the problems commonly met in fields and possibly resolved by well test and its study in different stages from exploration to development of the fields. This study for gas reservoirs can be called "dynamic description of gas reservoir" or "dynamic reservoir description"; geophysical prospecting, geology-well logging and well testing are three key technologies, and well testing has its own special and irreplaceable functions"--Provided by publisher.