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The geochemical study of rocks, in the oil industry, is an efficient tool utilized for characterizing the organic content of rocks and possible source rocks. In the last decades it began to be used as a tool for chemical stratigraphy showing excellent results. The data analysis of total organic carbon, insoluble residue and pyrolysis results as hydrogen index, peak S1 (generated hydrocarbons) and peak S2 (hydrocarbons generated by pyrolysis), in six wells, resulted in the identification of four chemostratigraphic units, denominated A, B, C and D in the northern portion of the Santos Basin. The organic matter of units A and D was characterized as type III and units B and C as a mixture II / III. Units B and C showed potential for immature generation in this area. These potentially generating units would in the generation window at a depth of 5000m.

GEOCHEMICAL AND CHEMOSTRATIGRAPHIC ASSESSMENT OF THE ALBIAN-OLIGOCENE INTERVAL OF THE NORTHERN PORTION OF SANTOS BASIN