Hydraulic fracturing was first used in Texas to stimulate oil wells as early as the 1940’s.
Hydraulic fracturing also referred to as ‘Fracking’ has created a supply of low-cost natural gas. This reduces the cost of heating for people using natural gas to heat their homes, as well as low cost electricity.
Shale is usually located thousands of feet below aquifer. So the risk of aquifer contamination is virtually impossible. Contamination usually occurs if the cement around the drill pipe is not sealed properly, this can allow natural gas to migrate to the surface. Once at the surface the gas can enter well water or aquifers. This can be prevented by proper procedures.
Companies are constantly working on newer better technologies to help eliminate the concerns associated with fracking. There are reports that Canadian companies have used liquefied petroleum gas consisting mostly of propane instead of water, and Poland is experimenting with vibration.