Abstract: Aim at the dynamic monitor information that the pressure monitor well order on time of not the consecution and histories inherit according to邸ng the well data and producing the dy-namic information and combining the geology static data of many times in the past, applying time extrapolation well test theories
and the nerve network technique, combining to the emulation backs the fire calculate way, carrying out to static pressure,effective permeate rate and epidermis factor to try the estimate that the well parameter changes .Finally, applied example analysis, explain to make use of appling the well test history information to carry on time extrapolation well test predicting is useful.

Key words: time extrapolation well test, the neural net-work, the emulation backs the fire calculate way