How is Shale Gas Extracted?
How is shale gas extracted? Hydraulic fracturing and directional drilling (Professor Richard Davies, Durham University)
Professor Richard Davies (Durham University) provided an overview of the processes involved in extracting shale gas, including horizontal drilling and hydraulic fracturing (‘fracking’). He reviewed the principal associated risks, and set out evidence regarding the extent to which stimulated fractures can spread and the implications of this work for the minimum separation distance between fracking zones and drinking water aquifers.