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>