The Narrabri Gas Project operations propose to drill through the Pilliga Sandstone down to depths of up to 1000m - a further 750m below the Pilliga Sandstone. Due to the advanced drilling processes used, minimal water from the Great Artesian Basin (GAB) will be extracted. Based on averages, 1500 megalitres of water will be extracted per annum. This is equivalent to the amount of water required to grow 190ha of cotton as identified by the Australian Bureau of Statistics.
Between the GAB and the targeted coal seam are layers of dense rock called Aquatards. Aquatard is the name given to layers of rock, due to their characteristics to prevent the flow of liquid upwards and downwards beneath the surface. Therefore, the natural geology of this area, plays a big part in decreasing the likelihood of the project having an impact on the water.
Vince Haire, Narrabri Farmer & supports CSG
Dr Richard Cresswell is a well respected water expert, who has worked for leading environmental consulting firms within Australia as a Hydrogeologist, as well as a Research Scientist for the CSIRO. Here Dr Cresswell reiterates that the GAB will not be impacted by the Narrabri Gas Project.
Within the NSW Gas Plan, the Government commits to expand on the NSW Office of Water monitoring bore network. Additional to this, Santos conducts regular water monitoring in the area. To read more about the NSW Office of Water Monitoring Program click here.
NSW Office of Water - Gunnedah Basin Overview Parts 1, 2 & 3