Zone tab |
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Petra defines a zone as a specific interval defined by a discrete top and a base. Usually a zone's top and base are defined by specific formation tops so that the zone covers a consistent lithostratigraphic unit. Inside each zone, Petra stores a Data Item such as isopach, net pays, or log measurements that relate to that zone. Since zones and their data items are shared across all wells in a project, this method of organizing data makes storing and mapping single-value data for a specific formation much easier. As an example, mapping all the isopach values for a specific formation is much easier when the values are all stored in one common zone data item for each well.
Three zones defined by four formation tops
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