Tem Survey At Sergipe-Alagoas Basin

Carbonates make up about 20% of the<br>sedimentary rocks record, but they account for more<br>than 50% of the world’s proven oil reserves (Palaz &<br>Marfut, 1997). Carbonates differ from siliciclastics in<br>generation, geomorphology, and diagenesis, all of<br>which modify the mineralogy, porosity and<br>permeability so important to reservoir quality.<br>Recent discoveries of high porosity’s layers<br>in deeply seated carbonate sediments have pointed<br>out that deep hydrocarbon carbonate reservoirs are an<br>important Brazilian exploration frontier (Brunh,<br>1990). Among the most impressive deep reservoirs in<br>Brazil are the fields of Badejo, Pampo e Linguado at<br>Campos Basin (reservoir is located 2500-3100 m<br>depth - Lagoa Feia Formation), and Tubarªo at<br>Santos Basin (reservoir at 4600-4850 m depth -<br>GuarujÆ Formation).