Earthquakes Induced by Fluid Injection - 10 of 9

Earthquakes Induced by Fluid Injection FAQs - 9 Found

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Does the production of natural gas from shales cause earthquakes? If so, how are the earthquakes related to these operations?

To produce natural gas from shale formations, it is necessary to increase the interconnectedness of the pore space (permeability) of the shale so that the gas can flow through the rock mass and be extracted through production wells. This is usually done by hydraulic fracturing ("fracking"). Fracking causes small earthquakes, but they are almost always too small to be a safety concern. In addition to natural gas, fracking fluids and formation waters are returned to the surface. These wastewaters are frequently disposed of by injection into deep wells. The injection of wastewater into the subsurface can cause earthquakes that are large enough to be felt and may cause damage.

Tags: Seismology, Liquefaction, Tsunamis, Earthquakes, Faults, Tectonics, Magnitude, Prediction