Class_II_Wells_in_Kentucky

<span style='overflow: auto;'><span>This map service of 3,000 wells was compiled from EPA's database of Class II Wells in Kentucky as documented from Freedom of Information Act (FOIA) requests.<br /><br />Class II wells inject fluids associated with oil and natural gas production. There are two types of Class II wells in Kentucky: salt water disposal (SWD) wells, and enhanced-recovery injection (ERI) wells. Disposal wells inject brines (salt water) that are brought to the surface with oil and gas back into the same formation from which they were initially produced or into similar porous underground formations. This practice of brine disposal also ensures the protection of underground sources of drinking water. <br /><br />Enhanced recovery wells inject brine, water, steam, polymers, or carbon dioxide into oil-bearing formations to recover residual oil or natural gas. This is also known as secondary or tertiary recovery.<br /><br />These data were linked to a Kentucky oil-&amp;-gas well location shapefile by spatial join to EPA-supplied locations using a buffered search method. Over 2000 Class II locations were matched to well locations in the KGS O&amp;G well database. If successful match were not made by proximity, then EPA well information and location were provided as is.</span></span>