Thanks @VOGC for sharing your thoughts with us. It benefitted...

Thanks @VOGC for sharing your thoughts with us. It benefitted many shareholders, and I am being one of them. I bought my last parcel (200,000) on Friday with 10.5c and it is already on money.
VOGC was talking about vuggy limestone, if anyone is wondering what it is, then see below how it is formed and with couple of photos:



Vuggy limestone photo

Another one

Then look at the company photo on the sample collected at Amistad 1A unit

That shiny things are oil in the vuggs. I wonder whether the hole on the left side is a small open cavity (with oil) or a cavity filled with sand/silt which dropped out during sample extraction.

And Limestone/Carbonate rocks also got cavities, caverns and caves. The caves in the southwest of Australia (south of Margaret River) are in limestone.
Permeability in limestone is very high. Pumping out water in excavations in limestone formations near ocean is like trying to drain the ocean.
5% porosity in limestone is very conservative. With vuggs present, it could be much higher than 15%. Primary permeability (flow from one vugg to the other, in simple terms) as reported by the company will increase the flowrate and recoverability.
Thanks again, VOGC.