Questions linger about impacts of deep well injections, hydraulic fracturing by oil industry

Questions linger about impacts of deep well injections, hydraulic fracturing by oil industry by Dina O’Meara, April 11, 2012, Calgary Herald
While Alberta has increased the number of earthquake monitoring devices across the province to better understand seismic activity over the past decade, British Columbia will be releasing a study this summer on possible links between seismic activity and drilling. More immediately, a new study conducted by the U.S. Geological Survey points to human interference affecting an “unprecedented” spike in mini-earthquake activity around areas of intense oil and gas production. … The oilpatch has known for years there can be seismic activity due to deep wastewater well injections and fracturing, which involves pumping fluids into the ground at high pressure to enable oil and gas to leak out of tight formations.

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