How shale gas is produced by fracking?

During hydraulic fracturing, a mixture of water, chemicals and sand is pumped down a borehole at high pressure. The water pressure opens up cracks in the rock and the sand grains lodge into the spaces to keep them open, allowing the released gas to flow out of the rocks and travel back up the borehole.

What causes the fracking fractures of the shale rock?

During the formation of oil and gas, large fluid pressures are generated. These pressures result in natural fracking, and the resulting fracture permeability allows oil and gas to escape, reducing the fluid pressures. These fractures may subsequently be sealed by mineral deposition, resulting in tight shale formations.

Why is fracking bad for the environment?

Fracking has been blamed for leaking millions of tons of methane, a greenhouse gas more potent than carbon dioxide. Fracking is also associated with other airborne hydrocarbons that can cause health and respiratory issues. Fracking uses large amounts of water, which can become contaminated and affect local groundwater.

Is fracking more beneficial or harmful?

On the benefits side, fracking increases economic activity, employment, income and housing prices. But, it also brings more truck traffic, increases in crime and potential health impacts possibly due to air and/or water pollution.

Why is fracking so controversial?

Why Is Fracking Controversial? Fracking has a long rap list ranging from its use of carcinogenic chemicals to its environmental polluting methods. Residents who live near fracking sites complain about groundwater contamination, air pollution, earthquakes, noise pollution, and more.

How does fracking destroy the land?

Habitat destruction and natural resources impacts – Fracking converts rural and natural areas into industrial zones, replacing forest and farm land with well pads, roads, pipelines and other infrastructure, and damaging precious natural resources.

Does shale require fracking?

Hydraulic fracturing – commonly known as fracking – is the process used to extract shale gas. Deep holes are drilled down into the shale rock, followed by horizontal drilling to access more of the gas, as shale reserves are typically distributed horizontally rather than vertically.