RE: Q3 Investor Presentation14 Sep 2018 09:54
Morning folks - Forgive me if i appear a little out of touch. This was the explanation on the "potential" TCF numbers that was prepared for the Gherkin event last year. Just skimmed through a few posts and i saw Explorations post quoting...
"The recent 34 tcf Basin Model defines the total amount of gas generated in Tendrara area"
The original model explained the hercynian event where you invert the basin, erode away about 1 – 2km of section which in turn then freezes any further hydrocarbon generation because you have come upward, this is the generation process, however there is a latent effect where a small amount of generation continues until it halts.
All this is before any salt is present; this is the concept phase, the birth of the hydrocarbon entity. Then this section is further buried and we move upward to the formation of the TAGI and the salt seal then the Jurassic Cretaceous series pushing the rest of the Silurian, the Devonian and the carboniferous all through that petroleum generation window. So all these hydrocarbons are being generated and they are coming up through the Paleozoic some of which is being trapped within the Paleozoic some is coming up to the basin edge and then migrating up through the TAGI beneath the salt seal.
So from this model now the company who have created it can calculate the volume of charge which amounted to around 9 gigatons of petroleum, both liquid and gas which is equivalent to around 260tcf of gas, if you recall from the gherkin presentation the model is based upon a total basin generation of 260tcf of which the estimates remaining due to migration, seepage, and other anomalies that would lead to the loss of these hydrocarbons to lie at either the recently RNS reported volumes of 9, 17 and 31tcf. This is how they came up with the original numbers, this is based on gas found to date, historical data from previous wells, known geology extrapolated from proven Algerian basins in which tendrara and meridja both share (this is proven).
The 260tcf has dissipated over time leaving behind the potential volumes within various traps and sealed under the 1km salt. Most of the hydrocarbons have seeped through faults and out into the atmosphere. There is sufficient data around the previous wellheads to be able to make a very good estimate, according to this type of basin and the proven seal what they would anticipate to be in place just ready and waiting to be extracted and piped to the Moroccan and European people! This is also 1, 3 & 15% of the expected hydrocarbons being trapped they then applied a Monte Carlo simulation where the numbers 9, 17 and 31TCF were created.
This may well be irrelevant at the moment but i felt impressed to share this information as there was a similarity in the posts i read.
Take care, sorry i have not popped in for a while....i do like to read the bb now and then!