UKOG have been quite vague about what experimental methods they will use to extract from Dunsfold High Loxley well. They say they plan to use stimulation methods but don’t specify what fluids will be pumped into the well.
A key element of the oil extraction methods proposed for the sites in the Weald is Acid Stimulation or Acidisation. There is a fair degree of obfuscation about the merits and dangers of this – notably to avoid any similarity with Fracking. So to best explain we would direct you to our friends at Weald Action Group who have a detailed description of Acidisation.