Infrastructure Bill [Lords] — House of Commons, 2015-02-11
Topic: Energy
Peter Lilley (Conservative, Centre-right): I am sorry but my hon. Friend misheard me. I said that we have drilled 2,000 onshore wells—I was not talking about fracking wells. As for the risks of escape of gas, it does not matter whether it is fracked or not. We have drilled 2,000 such wells, only 200 of which have been fracked, and they tend to be shallow and small pressure. I will move on to the issue of fracking, but if people are worried about methane or liquids permeating to the surface, that is an issue about well casing. We have very adequate and strong controls on that, and, as far as I know, there is not a single case among those 2,000 wells where a problem has resulted The second issue is whether fracking—the use of high pressures, at depth, as my hon. Friend says—will lead to those fractures reaching up to the water table. The useful report produced by the Royal Society and the Royal Academy of Engineering, which is studiously ignored by those who wish to raise fears and concerns, makes it absolutely clear that that is extremely unlikely. For fractures to permeate requires immense energy and for them to remain open proppants have to be put in; sand is injected to try to keep them open. The idea that they will be able to be kept open for several hundred if not thousands of feet, extending up to the aquifer, is almost laughable. Even this well-measured report states: "Sufficiently high upward pressures would be required during the fracturing process and then sustained afterwards over the long term once the fracturing process had ceased. It is very difficult to conceive of how this might occur given the UK’s shale gas hydrogeological environments." Even if that did occur, an upward flow of fluids would not result unless "the permeability of the fractures" was "similar to that of the overlying aquifer for any significant quantity of fluid to flow. In reality, the permeability of the aquifer is likely to be several orders of magnitude greater than the permeability of the fractures. Upward flow of fluids from the zone of shale gas extraction to overlying aquifers via fractures in the intervening strata is highly unlikely." That is an understatement Concerns have also been raised about the process resulting in excessive abstraction of water—too much water being used—putting our water supplies under threat. The report states that the amount of water "needed to operate a hydraulically fractured shale gas well for a decade may be equivalent to the amount needed to water a golf course for a month" It states that "the amount lost to leaks in United Utilities’ region in north west England every hour" exceeds the water required by one shale gas well for a decade, so there is no danger of excessive water abstraction and use as a result of this process Then we hear the frequent assertion, "We just can’t take the risk. This is a new, untried, untested process. We don’t know what dangers could result." In fact, 2.5 million wells have been fracked worldwide and not a single person has been injured or harmed as a result of contaminated water. Not a single building has been damaged by the resultant seismic events that are so small that they would probably be less than if we dropped one of the Dispatch Boxes on the floor We are dealing with a well-tried and tested procedure worldwide. In this country, we have drilled 2,000 wells well below the aquifer and had no problems of contamination. We know from very respected bodies such as the Royal Academy of Engineering and the Royal Society that the risks are negligible, certainly if we continue with the sort of processes and environmental protection that they say already exist, although they do recommend that they could be strengthened in certain ways I urge the House not to be frightened by those who are trying to scare us into failing to exploit a resource that is potentially of immense value to this country and, not least, to those areas where shale is most prolific.