Abstract:

There are many descriptive methods on the formation damage. But their mathematical relations are not clear, and there is not any unified standard.Their basic evalution method is non-steady test well, in which Horner method and curve match method are convenient to the general formation, while for the complicated uniform formation, especially for non-uniform formation, the former doesn t work so often and the latter doesn t obtain the sole resultThis paper gives out the general expression and unified standard of the mathematical relations between skin factor and other parameters of formation damage，and systematically presents a modern test well program for determining formation damage of uniform and non-uniform reservoirs，which also includes a preliminary model of theartificial intelligence，such as analysis basis，purpose，key and reliability.

Key words: homogeneity, inhomogeneity, Formation damage, Evalution standard, Modern test well, Artificial intelligence