Seismic Poststack and Prestack Inversions in the Playuela Field

Ricardo Vazquez¹, Alfonso Aguirre², and Fernando Flores, Jr². (1) Exploration, Mexico University, Jose Cardel 9 Ejido Primero de Mayo, Veracruz, Mexico, phone: (52)2299892623, rovazquezr@pep.pemex.com, (2) Exploration, Mexico University, Veracruz, Mexico

Natural gas is playing an important role in Mexican industry. The paradigm shifts produced by the gas strategy, from oil to non-associated gas, from deep to shallower targets, from siliciclastic reservoir, and from structural to stratigraphic traps,have together promoted the use a new techology to reduce the risk involved in prospect evaluation, reserve estimation and reservoir characterization in Mexican gas provinces. Veracruz Basin has been a natural lab where amplitude anomalies represent more then 85% of success in drilling locations allowing to incorporate an important number of new fields in the last 4 years. Basin analysis and play characterization have also played an important role by considering that gas-producing reservoirs are Tertiary siliciclastic deep-water systems. Veracruz basin,then, has been a good field for the successful aplication of amplitude-anomaly based techiques. According to the nature of the problem, leading edge technology as instantaneous attributes, AVO, seismic pre-and post-stack inversion have been successfully applied to recognize patterns and make predicction on prospective intervals defining the proper location of appraisal well, and making reliable reservoir characterizations. This study inclued the historical case in Playuela Field, when we have need to use the seismic inversion to reduce the amplitud risk in our next drilling.

Geologic Interpretation of Seismic Attributes and Amplitude Anomalies
2004 AAPG International Conference and Exhibition Technical Program