Applications of
the Trap and Seal Analysis Methodology on Prospects and Reservoirs in
Carbonates,
Sanchez, Raymundo1, Marco
Arreguin2 (1) Pemex Exploracion
y Produccion, Villahermosa,
Tabasco, Mexico (2) Pemex Exploracion
y Produccion, Boca del Rio Veracruz,
Mexico
An example of the application of the trap
and seal analysis is presented. A mature, light-oil and gas producing field was
interpreted using 3D-seismic recently acquired. The reservoir is Cretaceous
carbonate. Four blocks adjacent to the field were identified and development
prospects were proposed in each block. A pre-drill trap and seal analysis was
conducted. Potential hydrocarbon columns were estimated and risk-assessment for
both trap and seal elements was done. The analysis included both the QC of maps
and assessment of top seal capacity. Fault plane profiles were constructed in
order to assess the lateral seal capacity since the prospects were
fault-dependant traps.
As a result of the study, it was
concluded that lateral seal had the higher risk. The fault plane profiles
showed that there is reservoir-to-reservoir juxtaposition between the different
blocks. This conclusion was confirmed when a well was drilled in one of the
studied traps, then the development strategy was changed for this field
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California