What Is Fracking?
Shale gas is extracted through a process called hydraulic fracturing or ‘fracking’, in which fractures have to be created in the rock by forcing water, sand and chemicals (1%) at high pressure allowing the trapped gas to be released into the well.
Did You Know?
It is banned in Luxembourg, France, Bulgaria and Germany and such moratoria are already in place in many areas in the USA, including New York State, New Jersey and Vermont.
Where Is It Happening?
Everywhere, including right on our doorstep!
This licensing map of the UK shows which areas have been allocated a Petroleum & Exploration Development Licence (PEDL). The Department of Energy and Climate Change (DECC) is divided into a network of blocks. Initial block licenses last for six years – enough time, according to DECC, for the developer to get planning permissions, work out the viability of the area. Further information on the companies involved is available here.
Lancashire has been identified as having 200 trillion cubic feet of potential shale gas reserves, and plans have been announced for over 840 wells over the next 16 years. There are six current sites in Lancashire: Preese Hall, Weeton, is the only UK site to have currently been fracked as opposed to test drilled; test drilling has been in progress at Marsh Road, Banks; Grange Road, Singleton has been drilled, but not fracked; the Anna’s Road site near Lytham St Anne’s is completed ready for the drill; and there is also planning permission for a site at Inskip Road, Wharles, and in Kirkham.
Current activity on the Fylde
Below is a list of where Cuadrilla has current interests in the Fylde and Wre. Only one well has been hydraulically fractured so far – at Preese Hall. It’s important to remember that Cuadrilla has a 50% failure rate so far – four wells have been drilled and two have failed, one at Anna’s Road, the other at Preese Hall. Cuadrilla has said that it is applying for planning permission at six further sites. At the moment we do not know where these sites are.
Current sites are:
- Clifton – this is the newest of the sites the company says it is proposing to submit a planning application for a vertical exploration well. Cuadrilla says the proposed well would allow rock samples to be extracted from the shale deep below the surface for analysis and that the well will not be hydraulically fractured. The proposed well site is located to the south of Clifton Business Park off the A584, close to a low level radioactive disposal site, a landfill site, and not far from a nuclear fuel production site at Salwick. It is also on the banks of the River Ribble.
- Elswick – although the well is now owned by Cuadrilla, the Elswick-1 gas well was completed and stimulated by Independent Energy in 1993. The purchase of the well in 2010 by Cuadrilla appears to be a PR exercise to convince residents of the safety and low impact of hydraulic fracturing. Mark Miller, CEO of Cuadrilla, said in a letter to the Southport Vistor that,”the well has been producing gas since it was hydraulically fractured in 1993 without any inconvenience for the local community.” The fact is that Elswick-1 is a conventional gas well, though one drilled into a quite low permeability sandstone. It is not a shale gas well and it is vertical not horizontal. Gas flows naturally, ie, it does not need continuous fracking. Also the scale of this well is entirely diffferent from what is planned for the rest of Lancashire. This is one vertical well, ‘fracked’ once (if we assume it was) at 4,200 feet. Currently 842 wells are planned, vertically drilled to 9,000 feet, and then drilled 12,000 feet horizontally with full multi-stage fracs. Frack Off has further information on this.
- Kirkham site (consent acquired). Temporary planning permission for the Kirkham site was granted on 15th June 2010. The company says it currently has no plans for the site.
- Singleton – Grange Hill site (drilled). Temporary planning permission was granted in April 2010. Drilling began at the Grange Hill site in January 2011. Drilling reached a depth of 10,700 feet. The well has not been fracked but Cuadrilla is currently applying for extended planning permission to carry out test drilling and fracking.
- Weeton – Preese Hall site (drilled). Temporary planning permission was granted in October 2009. Drilling began at the site in August 2010. The well was hydraulically fractured in 2011. During fracturing earth tremors were experienced. Cuadrilla kept on fracking despite knowing that the tremors had caused damage to the well. At this pint the government introduced a moratorium. Flowback water from the abandoned well is collected on site, Cuadrilla claim the flowback is collected in a secure steel tank and disposed of appropriately. neither Cuadrilla nor the Environment Agency will reveal where this flowback is treated.
- Wharles – Hale Hall Farm site, Inskip Road (consent acquired). Temporary planning permission for the Hale Hall Farm site was granted in February 2010. Cuadrilla says there are currently no plans to undertake exploration at the site
- Westby – Anna’s Road site (consent acquired). Temporary planning permission for the site in Westby was granted in November 2010. In August 2012, Cuadrilla announced that it was ready to drill horizontally at the site, even though horizontal drilling was not a condition of the exploratory phase planning permissions. At the end of 2012, the company announced that it had messed up the well – the concrete casing was proved to be inferior and then a piece of equipment got lodged down there, so the well was abandoned. Cuadrilla has submitted a planning application to Lancashire County Council to enable it to undertake hydraulic fracturing of the gas reservoir. Further information on the botched well is available here.
Other sites in Lancashire
- Becconsall site, Banks (drilled). Temporary planning permission was granted on 20th October 2010. Drilling began at the site in August 2011 and lasted for just over three months. In September 2012 Cuadrilla applied for a 36 month extension to the temporary planning permission. This was granted. Cuadrilla is currently applying for planning permission for test drilling and fracking.
What Could Go Wrong?
Scientists have identified the following potential hazards:
Blowout When blowout prevention equipment is absent or fails, pressurised fluid and gas can explode out the wellhead, injuring people and spewing pollutants.
Gas leak Methane, the primary gas in natural gas, may be present in layers of rock above the target layer. Cracks in the cement that seal the well to the surrounding rock can provide a path for this methane to travel into the water table.
Air pollution Flare pipes that burn methane so it doesn’t build up, diesel truck exhaust and emissions from wastewater evaporation can dirty the air near a drill site. When methane is released without being burned, it acts as a potent greenhouse gas, trapping 20 times as much heat as carbon dioxide.
Wastewater overflow Fracking fluid, about 1 percent of which is made up of chemicals (sometimes including carcinogens), is increasingly recycled for use in other wells. But sometimes it is stored in open pits that emit noxious fumes and can overflow with rain.
Other leaks There are some worries that local geology in particular areas would allow fracking-produced fluid and methane to travel upward. But most evidence of exposure stems from surface problems such as spills or illicit dumping.
Home explosions If methane does get into the water table — because of cracked cement, local geology or the effects of old wells — it can build up in homes and lead to explosions.