The figures for a coal power plant are 24-40% increase in fuel needed to capture 81-88% of the CO2 produced.
(see page 43 table TS 10).
I think you're slightly misreading the information in that table.
the 81-88% figure is for the total amount of CO2 emissions avoided by using these plants compared to a standard non CCS coal fired power station, ie the increase in fuel use is already calculated in that figure.
It's not the figure for the percentage of the CO2 produced that is captured.
So, a CCS coal fired power station would emit between 12-19% of the CO2 compared to a standard coal fired power station for each KW/h produced.
Given that the higher figure is for capturing post combustion in existing plants, that would need just short of 1 new powerstation for every two fitted.
true, but then if we're talking new stations it's only an extra 1 station for every 4 built.
This does not including the energy cost of transporting that much gas, producing the infrastructure to transport and the energy necessary for injection into geological sequesteration sites.
true, but that's an arguement for starting now so that we can reuse as much of the existing north sea gas and oil infrastructure as possible as fields wind down their production, rather than leaving it until after everything's been decommissioned to start from scratch building new rigs, drilling new boreholes etc.
These will be (for the uk) older gas fields, these will be under huge pressure and with temperatures often well above 100C (some will be much cooler).
The pressures not that great relatively speaking as they've already been emptied of their gas or oil to the point where it's uneconomic to pump any more out (more of an issue when combined with EOR).
Also when ever geological sites in the North Sea are mentioned, then enhanced oil and gas recover is brought up. This is simply producing more carbon.
True, this is a major concern.
However there are a couple of points to consider here.
Firstly, there are advantages to using fields as they're exhuasted without Enhanced Oil Recovery (EOR) in terms of the potential to reuse existing infrastructure - adapt the platform, and reuse the existing wells. With EOR, there's the additional upfront cost of drilling new boreholes to inject the CO2 as well as new facilities to house the equipment needed to inject the CO2 meaning either a new platform, or a subsea installation vs a non EOR site where you could use the existing platform.
BERR give the difference in platform cost between non EOR and EOR sites as £40m vs £140m for shallow water sites, and £75m vs £280m for deep water sites.
Secondly, surely someone at some point has to inject some sanity into the situation and not allow CCS captured carbon to be used to enable more oil or gas to be pumped out... or at least not with any public money, or any money from carbon trading etc. surely.