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Following the successful application of high-resolution seismic to Tertiary clastic reservoir description in the Offshore Mexico area, (Salter et al, 2004), this study details the subsequent application to reservoir description of carbonate reservoirs of Mesozoic age in the Arenque and Lobina field areas. A survey of 320 km 2 was acquired with the express intention of helping to guide new well locations.In this paper we present an integrated approach to this reservoir characterization study. It benefits from the combination of Q seismic survey evaluation and design (Q-SED), high quality seismic acquisition and advanced data processing to prepare the data for its reservoir description objectives. The reservoir analysis following processing provided a much clearer understanding of the structural and stratigraphic controls over an existent field area, as well as a new field area, than had been possible to interpret using conventionally acquired and processed seismic data. The ability to map discretely key reservoir units within the Mesozoic provided a structural framework through which reservoir properties could be accurately mapped. The quantification of reservoir properties such as porosity were driven by detailed rock physics analysis allowing the construction of high quality attribute maps pinpointing key areas of interest for new well locations.This study was directly used to assess four potential drill locations and resulted in the order of drilling preference being altered. A well in the Lobina field area was also successfully sidetracked to target a thicker section of the main reservoir facies as a result of interpretation performed on this new survey.

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