Mison and Nak are shallow water fields offered in second phase of Round One. The fields form a single development block in the Southwest Marine Region off the coast of Tabasco. The fields were formerly part of the Litoral de Tabasco business unit. Extra light condensate accumulations are present in Lower to Middle Cretaceous fractured carbonates and Upper Cretaceous breccia. The Kimmeridgian deposits are characterized by light oils in most of the area. The accumulations are found in oolitic bank facies with good primary porosity and are occasionally affected by dolomitization processes.