How does does CSG drilling affect groundwater?

Coal seam gas deposits are typically 400-1200 below ground, while freshwater aquifers are usually about 200m below the surface.

In most cases, CSG deposits are separated from the fresh water aquifers by extensive layers of impermeable geological formations. These layers form efficient natural barriers between fresh water and gas resources.

CSG wells have several layers of steel casing and cement that form a continuous protective barrier between the well and the rock. Millions of oil and gas wells have been drilled through aquifers without causing problems.

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