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Shale Gas

I took part in the Energy and Climate Change Committee inquiry into shale gas, and in the course of that inquiry, I took part in a number of visits, not just to the one site in the UK that is currently being drilled, but to areas where intensive drilling was going on, has been completed, is producing or—in many instances—has been abandoned. What I found particularly useful about those examinations of existing practice was that they not only helped us to consider the overall theoretical picture, but enabled us to see what a shale gas producing economy might look like in the UK, based on what we now know about the in-principle availability of shale gas in the various plays in the UK. I want to concentrate my remarks on these questions: if we were to proceed with the extraction of a sizeable amount of gas from the reserves that we currently know of, what would be the best, safest and most environmentally prudent way of doing so? If we consider that to be a minimum starting point for extracting shale gas, what will that make the UK's shale gas market look like? What effect will that have on the overall availability of gas? Looking at the matter from another end, a number of people have recently made quite wild claims about what the existence of the shale gas reserves means. Some people, in pursuit of particular agendas, have gone so far as to say that all we need to do is extract as much shale gas as possible, run the economy on that gas, and not worry about renewables anymore. They say that that would lead to an age of plenty for gas; gas prices would rocket downwards, we would have energy security for the foreseeable future, and we could abandon expensive alternative energy sources forthwith. Some of those statements are partially true; most are not fully true; and some, in my view, are completely off-beam. On the starting point for shale gas extraction in the UK, the regime under which extraction takes place must be such that the free-for-all drilling taking place in parts of the United States cannot and will not be allowed here. The US's experience is not comparable, and can never be compared, to what might happen in the UK, for a number of reasons. First, in the areas that the Select Committee looked at, the regulation of mineral rights is entirely separated from the regulation of property rights. One can literally fetch up in a truck outside someone's front garden and say to them, ““I own the mineral rights to the land behind your back garden as far as the eye can see, and I am going to start drilling in your back garden. There is nothing you can do about it. I might give you some money to compensate you, but that will be it.”” Consequently, certain plays in the United States, called sweet spots, have gone ahead with intensive drilling. In certain parts of the US, areas literally look like Swiss cheeses, with lots of drilling sites pockmarking the surrounding area. They even extend to urban areas and literally to people's back gardens. There is not only intensive drilling, but intensive drilling that goes horizontally out from the pads, which are the size of two football pitches; those are the typical starting points for shale gas drilling. There can perhaps be 16 to 20 wells per pad—intensive drilling indeed. As a result, a large amount of shale gas is produced, but wells continuously deplete, which means that each well is not producing an enormous amount of shale gas. The issue of depletion rates for shale gas wells is addressed in the Select Committee's report. It is the cumulative effect of a large amount of drilling for multiple wells in particular places that produces the overall volume. Plays in Texas, Pennsylvania and other parts of the US are infinitely easier—perhaps twice as easy—to extract from than is ever likely to be the case in the UK. We therefore need to treat the reports of overall reserves under the soil in the UK with some caution, because in practice, perhaps not more than 10% to 15% of the gas that is theoretically there will be extractable, even over a long time and with repeated fracking in particular wells. I completely concur with the caution expressed—caution is the watchword in the Select Committee's report—regarding the conditions under which drilling may take place. Under a regime with conditions, I think that a substantial amount of shale gas can be extracted over a long time, but probably not a volume that will be the price-reducing game changer that some people talk about. A recent report by Bloomberg looking at, among other things, the likely future effects of shale gas on UK prices suggested that there would not be a significant effect on prices. There may well be a significant effect on energy security; we would replace at least a proportion of the nearly 40% of gas that is imported with gas produced in the UK. That is potentially important, but it seems unlikely to be a price-reducing game changer. The conditions are important because in the UK it will be necessary to obtain proper licences, maintain the right safety procedures in all wells, and ensure that wells are correctly sheathed, so that there is no danger of the contents of particular geological levels permeating and contaminating other levels. It will also be necessary to be careful about the use, disposal and—I hope—recycling of the large volumes of water that are used in shale gas extraction. That subject is another feature of the Select Committee's report. There is considerable tension about water in certain parts of the country, so even the use of 1%, 2% or 3% of the water supply could put substantial and increasing pressure on the amount of water available. Keeping a close monitoring eye on the use of water will be important.