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A new study led by A&S professor Tao Wen used a novel method of machine learning to explore the environmental impact of oil and gas drilling.

Environmental impact of hydrofracking vs. conventional gas/oil drilling: Research shows the...

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Local impacts from fracking the Eagle Ford

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What factors influence the likelihood of fracking-related seismicity in Oklahoma?

Hydraulic fracturing (Creative Commons photo)

Understanding the link between fracking and earthquakes

Wells drilled into Oklahoma's Arbuckle formation inject wastewater (1) which then disperses through the rock. As it spreads, the wastewater can trigger earthquakes in fault zones (2), but their size depends on the amount injected and the rock's properties. The new model can predict quake probabilities by the quantity of wastewater injected.

Predicting earthquake hazards from wastewater injection

Aerial view of the hydraulic fracturing rig at Cuadrilla’s Preston New Road site. Credit: Matthew Hampson, Cuadrilla Resources Ltd

Predicting seismic activity at fracking sites to prevent earthquakes

USGS map highlights earthquake risk zones. Blue boxes indicate areas of high activity of human-caused earthquake due to deep bore fluid injection.

Earthquakes are triggered well beyond fluid injection zones

hydraulic fracturing for shale gas

Damaging Sichuan earthquakes linked to fracking operations

This is an aerial view of hydraulic fracturing operations across the Jonah field, a large natural gas field in Wyoming.

Where water goes after fracking is tied to earthquake risk

Radium from within rock leaches from clay minerals that transfer highly radioactive radium-228 and an organic phase that serves as the source of radium-226.

How slick water and black shale in fracking combine to produce...

injection operation

Injection wells can induce earthquakes miles away from the well

Fracking

Human-made earthquake risk reduced if fracking is 895m from faults

Pipeline monument, Cushing, Oklahoma.

Oklahoma’s earthquakes strongly linked to wastewater injection depth

A UAlberta researcher is the first to link the likelihood of earthquakes caused by hydraulic fracturing to the location of well pads and volume of liquid used in the process.

Fox Creek earthquakes linked to completion volume and location of hydraulic...

Wastewater injected in an underground reservoir layer crossed by a fault triggers an earthquake

Modeling the effects of wastewater injection

Small earthquakes (yellow stars) can be induced during hydraulic fracturing when high-pressure fluid (blue arrows) is pumped into horizontal wells to crack rock layers containing natural gas.

Small earthquakes at fracking sites may be early indicators of bigger...

Hydraulic fracturing rarely linked to felt seismic tremors

West Virginia groundwater not affected by fracking, but surface water is

Fracking

Anticipating hazards from fracking-induced earthquakes in Canada and US

Study reveals two seismic processes by which hydraulic fracturing induces tremors

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