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NDT.net Issue - 2017-08 - NEWS
NDT.net Issue: 2017-08
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)
NEWS

Funding secured to develop new sensor technology for safe shale gas extraction

TWI Ltd (The Welding Institute)186, Great Abington, Cambridge, United Kingdom

An exciting new project to develop a system for safe shale gas drilling in Europe – that is being delivered by a consortium comprising TWI Ltd (UK), Danish Technological Institute (Denmark), ZELENA INFRASTRUKTURA (Croatia), HGL Dynamics Limited (UK) and META Group S.R.L. (Italy) – has recently commenced and will run for a two-year period.

The technology at the heart of the ShaleSafe project will enable the identification and exposure of underground water held in aquifers that has been contaminated by chemicals related to shale gas exploration and management. This will be achieved by developing an automated system incorporating sensors that will continuously detect in-situ methane and organic compounds, including the additives used in hydraulic fracturing, and enable the quality of the underground water to be constantly monitored. In turn, this means that the operator can immediately be alerted when pollution is detected.

The natural gas produced within shale gas plays, also known as formations, presents different technical and environmental challenges when compared to conventional gas plays. The key issue causing concern is related to the use of a process known as hydraulic fracturing, or ‘fracking’, in which a mixture of water, sand and chemicals is pumped under high pressure into the underground layer in order to break apart the rock and release the gas.


Image shows a visualisation of ShaleSafe technology deployed in the vicinity of a shale gas well site.

The main environmental impacts in relation to shale gas extraction include underground water contamination; water abstraction; greenhouse gas emissions; and its potential effect on landscapes and local communities. The most imminent challenge for the oil and gas industry in Europe is to be able to demonstrate and guarantee, safe shale gas exploration and extraction in order to address the associated environmental concerns.

Underground aquifers can become contaminated by methane and chemicals used during the fracking process. Currently, possible pollution is detected by taking samples at monitoring wells and analysing them in a laboratory. However, the process of collecting, preparing and transporting groundwater samples is prone to errors and, most importantly, analysing them can take several weeks, allowing pollution to go undetected for some time.

Amina Boughrara Salman, Senior Project Leader and ShaleSafe Project Co-ordinator at TWI explains “There is an industry wide need to develop and implement technologies that can continuously, reliably and cost effectively monitor environmental risks related to the exploration and production of shale gas”. “Therefore, the ShaleSafe project aims to provide shale gas exploration companies with a system that will enable them to meet the requirements of compulsory environmental impact assessment regulations in respect of sub-surface operations.”

The ShaleSafe project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691527. For further information, visit www.shale-safe.com.

 
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