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The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set of known or postulated oil and (or) gas accumulations sharing similar geologic, geographic, and temporal properties within the Total Petroleum System, such as source rock, timing, migration pathways, trapping mechanism, and hydrocarbon type. The Assessment Unit boundary is defined geologically as the limits of the geologic...
    map background search result map search result map Square-Mile Cells that represent Proprietary Gas-producing Wells from Shale Intervals in the United States USGS Gulf Coast Petroleum Systems and National and Global Oil and Gas Assessment Projects - U.S. Gulf Coast Downdip Paleogene Formations 2017 Assessment Unit Boundaries and Assessment Input Forms USGS Gulf Coast Petroleum Systems and National and Global Oil and Gas Assessment Projects - U.S. Gulf Coast Downdip Paleogene Formations 2017 Assessment Unit Boundaries and Assessment Input Forms Square-Mile Cells that represent Proprietary Gas-producing Wells from Shale Intervals in the United States