Hydrogeological aspects of shale gas extraction in the UK

UK shale gas exploitation currently at a very early stage. Potentially significant quantities but resources are not yet proven. In the UK a number of the potentially exploitable shales are below important aquifers.Water demand for shale gas production may not be significant relative to other uses but local needs must be considered carefully. Shale gas extraction will use/mobilise potential pollutants. Risks must be fully assessed and managed effectively – through to post abandonment. The most significant risks will be from surface activities, followed by poor well design/completion and pre-existing artificial pathways. Once in production, the long term well integrity is critical. Baseline and on-going monitoring is essential We need to learn from the US but only what is relevant and reliable!