... principle behind history matching whether it be with the use of sensitivity coefficients or geo-statistical approach, are based on the traditional method. AHM Technique The AHM technique uses the underlying 3DSL model to determine streamline paths in the reservoir. Tracing all the streamlines for a given well allows the identification of the grid blocks through which fluid flow occurs. This allows for the modification of grid blocks as required. As of the step required in the traditional method; identifying parameters that need change and implementing those changes, the AHM method is based on that assumption. The history matching algorithm used in AHM enables the method to thoroughly be in control of parameters. The method recognises that the permeability is the most frequently changed parameter and also that there are no in-situ measurements of it. Therefore it assigns effective Kv/Kh ratio on a well-by-well basis. Another fact about permeability which it recognises ...

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