Articles that state the difficulty of establishing an accurate and reliable relationship between porosity and permeability, in order to create a continuous permeability profile in wells, abound in the Petrophysical literature devoted to carbonate reservoirs. To try and alleviate this difficulty, new numerical methods or data mining techniques are often proposed. However, despite the necessity of interpreting data in terms of causation, those papers hardly discuss and explore, and even less so, explain, the origins of this difficulty. Therefore, questioning the ways in which these techniques are used is as legitimate as examining if they are really effective.
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