Revised volumetric calculation14 Jun 2023 02:31
I did ask for comments on my initial calculations for the shallow sands intercepted yesterday, and received some. I thought the estimate looked far too high, and it was - thanks for your comments - that's why I show assumptions! Now I have a laptop to work from rather than just a phone, 2 morning espressos, and a calmer environment (no one wanting dinner!), here are my revised assumptions and numbers. Again, if you think they're cr@p, please say so, a consensus is more valuable than just one opinion.
* Uniform thickness of 11m (it may be thicker or thinner)
* Area 6km² = 6,000,000m²
* Porosity 20% (likely to be better consolidated than MOU turbidites, so lower than the 25% assumed for them)
* 66% recoverability (imo on the low side, but this is what is assumed in the CPR & by FDC)
* 70% charge (CPR again)
* 75% attributable to PRD
* Gas expansion Factor of 86. Rule of thumb is lithostatic pressure is 1 psi for each 1ft of depth. 350m x 3.28 = 1148ft depth, plus 122psi overpressure = 1270psi. 1 Bar = 14.7psi. 1270/14.7 = 86.4 Bar.
So, 11 x 6,000,000 x 0.2 x 0.66 x 0.7 X 0.75 x 86 = 393346800 m³
1m³ = 35.3ft³ which gives 13889075508 ft³ - near enough 14 BCF. Adjust the assumptions to come up with your own numbers.
Looking forward to adding the next 6 reservoirs in MOU-3, and borrowing the IBM quantum computer for the lower half of MOU-4.