Class II Injection Wells

The Preferred Way to Protect Water Sources, the Environment, and our Communities

UIC Injection Wells safely dispose of millions of gallons of brine obtained during oil and natural gas production. They return produced fluids brought to the earth’s surface during production back to where it came from. Nothing is more important than preserving our environment.  Safe disposal of the production brine from oil and gas production is crucial to protect our water and soil from contamination.

Why We Need Injection Wells

During energy production, brine is brought to the earth’s surface with oil & natural gas. Injection returns this saltwater back into the earth where it naturally occurs.

What Injection Wells Are

Injection Wells are drilled deep into the earth, far below the freshwater aquifer, to ensure that drinking water cannot be contaminated.  Next, a steel casing is run to the bottom of the hole. The casing is grouted in place with special cement. The casing isolates fluids from the well bore.

Drilling then continues below the casing down through the injection zone and casing is again cemented to the injection run. Injection fluids are pumped through another string of pipe called tubing. An injection packer is used near the bottom of the tubing to seal it against the casing. This packer prevents water from entering the space between the tubing and casing when water is injected.

Class II Injection Wells Protect Our Water Sources

Wasterwater is:
  • Returned to the part of the Earth where it occurs naturally.
  • Only injected into the zones of the Earth where the water is not suitable for drinking.
Class II Injection Wells are:
  • Constructed using several layers of protective materials, including steel and cement.
  • Designed to be intrinsically safe.
  • Highly regulated by the Environmental Protection Agency.
  • Closely monitored by permitting agencies.
  • Regularly inspected by Penneco Environmental employees.