This infographic is designed to help you understand the origins of shale and gas extraction (know also as 'fracking' or 'hydraulic fracturing'). Take a look to find out about it's origins, the process, how the U.S economy has benefitted, plus public concerns about the process.
Shale Oil & Gas Extraction (Fracking).
Prefer to view in pdf format? Click here to download the pdf version.
Key takeaway points
- Hydraulic fracturing has revolutionised oil and gas output in the United States.
- A mix of water sand and chemical additives is pumped into the well bore to stimulate the release of the product..
- The mix of fracking fluid is mostly water, but it also includes a small proportion of chemical additives. Some of the additives are highly toxic and need to be managed extremely carefully.
- At the depths where fracking occurs the rock is impermeable. The distance is several thousand feed below ground level, which much lower than the levels containing ground water.
- Useful websites covering arguments both for and against the process include; http://shalegas-europe.eu/shale-gas-explained/the-process-of-shale-gas-development/ http://www.dangersoffracking.com/