Statewide Rule 13-Geologic Formation Information The weblinks below connect to geologic formation information provided as a guideline for assistance in the determination of regulatory compliance of casing cement placement during well completions. This data is categorized by Commission District, on a spreadsheet with tabs for each county within that District. These Formation lists may not be all inclusive, and may also include formations that do not intersect all wellbores.THE PRESENCE OR ABSENCE OF THESE FORMATIONS IS TO BE DETERMINED BY THE OPERATOR FOR THEIR SPECIFIC WELL. Please review the “General Information” tab (the first tab of each District’s sheet) for additional information.
All Statewide Rule 13 Formations are listed in Excel Format