The National Carbon Sequestration Database and Geographic Information System (NATCARB) Oil and Gas spatial database is a small-scale (large-area) overview of carbon dioxide (CO2) geologic storage potential in oil and/or gas fields across the USA and parts of Canada. Storage estimates are quantified by the volume of oil and gas that has, or could be, produced, assuming that it could be replaced by an equivalent volume of carbon dioxide. Only oil and/or gas reservoirs containing water with total dissolved solids (TDS) greater than 10,000 ppm merited evaluation for potential CO2 storage. Storage resources labelled as "OIL" may represent oil-only fields, or combined oil and gas fields. Storage resources labelled as "GAS" represent gas-only fields.This data layer reflects the best available knowledge regarding the location of carbon sequestration potential in the USA and Canada, both onshore and offshore. Version Log: v1101 - Initial release for Atlas III; v1102 - no changes. Version not released; v1103 - Metadata revised. No change to data.; v1104 - no changes to Oil and Gas layer; v1204 - Initial release for Atlas IV. New data submitted by all regional partnerships. NATCARB is administered by the US Dept. of Energy (DOE) National Energy Technology Laboratory (NETL) and contains data provided by several Regional Carbon Sequestration Partnerships (RCSP). RCSPs orginally developed the data per individual geologic storage resource, or as continuous surface models, and then converted these data into a 10 km X 10 km vector "grid". The NATCARB Team at the Kansas Geological Survey compiled the regional datasets into a single, seamless layer.