Abstract:

Nowadays,many specialists and workers in well test analysis are all finding the methods that can get the parameters of well test effectively and automatically.In this paper,two automatic typecurve matching methods of modern well test analysis are presented after studying theories and algorithms of optimization.Based on the theory of least square method,combined with small residual sum of squares and large residual sum of squares,applied with the method of finite difference,a new algorithm can be concluded in well test analysis.Finally,compared with these two methods,the optimized algorithm in well testing can be obtained.

Key words: well test interpretation, well test algorithm, least square method, finite difference, automatic typecurve matching