Preliminary Results on the Geological Assessment of the San Fernando Region, Tamaulipas, México for CO2 Storage in Mature Oil/Gas Fields
The San Fernando region belongs to Burgos province, northeastern Mexico, wich is the largest producer of non-associated gas in the country. It is located in the Gulf of Mexico Coastal Plain, and the its subsurface is constituted by 5,000 m of Cenozoic siliciclastic rocks and 3,000 m of carbonates, evaporites and Mezosoic siliciclastic rocks overlying a metamorphic-igneous basement. The gas reservoirs are in Paloeogene sandstones of roll-over anticlines. The conditions required for a feasible site to store CO2 are similar to the petroleum industry, so mature oil fields represent an important target given the level of research and information available. In the studied region was considered the evaluation of Tertiary terrigenous sequences associated with stratigraphic and structural traps that ensure enough storage capacity, injectivity, safety containment features and stability of CO2. The restrictions for the selection of a site are: the reservoir must be between a depth of 800 m to 2,000 m; its thickness should be greater than 50 m; its porosity greater than 20%; and it should have a seal. Actually, in Mexico, theoretical studies of major basins are available, and now the regional research is undergoing in order to select suitable sites.
AAPG Search and Discovery Article #90167©2013 GCAGS and GCSSEPM 63rd Annual Convention, New Orleans, Louisiana, October 6-8, 2013