The Tamabra limestone of the Poza Rica oilfield, Veracruz, Mexico

Introduction -- Definition of the Tamabra Limestone -- Lithology -- General -- The Upper Tamabra -- The "b" horizon -- The "c", "d" and "e" horizons -- The "f" horizon -- The Lower Tamabra -- The Tamaulipas -- Summary -- Porosity and Permeability of the Tamabra -- Vuggy porosity -- Inter-crystalline porosity -- Measured porosity -- Fissure porosity -- Permeability -- Dolomitization -- Distribution -- The process of dolomitization -- Upper Tamabra -- Lower Tamabra -- Effect of dolomitization on porosity and permeability -- Conclusion -- Paleogeography of the Tamabra limestone of Poza Rica -- Factors limiting the porosity on the flanks of the reservoir -- Origin of the Tamabra sediment -- Reservoir Fluid Levels -- The gas cap -- The oil-water contact -- PR. - Mecatepec sector -- Escolín sector -- Pressure Maintenance and Secondary Recovery -- Gas injection -- Water injection -- References.