RE: Interesting Article by Peter Styles in Drill or Drop10 Nov 2019 15:47
Let’s not discuss the rights and wrongs of hydraulic fracturing on this board as it doesn’t concern UKOG...Conventional Drilling...Although some shifting of rock and deep sediment can occur, it wouldn't spur a major earthquake. Typical drilling-induced quakes register between –2 and –4 on the Richter scale, which is one thousandth as forceful as the rumble of a tractor-trailer driving by.Petroleum deposits, which are naturally mixed with water and gas, lie thousands of feet below the earth's surface in layers of porous rock, typically sandstone or limestone. (Contrary to what you might imagine, drilling for oil is more like sucking oil from a sponge with a straw than from a giant pool of liquid.)
At such depths, these liquids are under very high pressure. Pump petroleum out, and the pressure in the well drops, this is where water injection can come in to play, Water is injected to support pressure of the reservoir (also known as voidage replacement), and also to sweep or displace oil from the reservoir, and push it towards a well.
Normally only 30% of the oil in a reservoir can be extracted, but water injection increases that percentage (known as the recovery factor) and maintains the production rate of a reservoir over a longer period.
Waterflooding began accidentally in Pithole, Pennsylvania by 1865. Waterflooding became common in Pennsylvania in the 1880s...As I have stated waterflooding(injection) has been going on for years and not to be confused with hydraulic fracturing, so be aware when someone try’s to suggest that water injection is a form of hydraulic fracturing, Literally or physically it is not. This being all said UKOG have no need for Fracking and have categorically stated they have no intentions to do so in the future.