There are lessons to be learned from more than 40 years of oil and gas production history of theMonterey Formation in offshore California. From the exploratory to the development phase, there areconsiderations in applying interpretation processes developed for conventional reservoirs. These includeissues about the use of conventional wireline data for reservoir characterization, formation damage,formation testing and interpretation of DST's and well tests. But the most interesting observations arerelated to performance based reservoir characterization. Initial individual well productivities relate togeological composition and state of diagenesis of the formation and associated fracture density depictedfrom cores, FMI and other fracture identification logs. Presence of reservoir compartments is evidentfrom the performance of nearby wells. Duration of fracture controlled production, cumulative oilproduction for individual wells and monitoring of water invasion from bottom aquifer are directindications of compartments sharing a common aquifer. Performance data and other Information from anumber separate offshore fields producing from the Monterey Formations are included to demonstratesome of the above concepts.
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