In the oil industry the problem of scale formation causes a lot of damage, including the reduction in the production of liquid and thus can be cited oil, also with the increased costs for the production there of. The study of scale is then of paramount importance for the understanding of their formation mechanism and the choice of method for prevention and / or removal. Soxhlet extraction techniques EFRX, XRD and SEM were used to characterize a sample collected in the column of producing a water injection well. Through the analysis of the results was identified scale ferruginous type which its formation is associated with the presence of corrosive agents; and carbonate type, and its formation influenced by the concentration of calcium and bicarbonate ions dissolved in the water , since such formation is common in wells which have a high content of these ions , which is also favored by decreasing the pressure and temperature increase reservoir

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