9 to 23 billion barrels of Stock Oil Initially in Place12 Feb 2023 11:59
"Potentially generated hydrocarbons using the play and basin analysis method on the 6 high-graded key basins is estimated to be circa 90 billion barrels of oil in the Upper Jurassic-Lower Cretaceous play, which is the proven and producing petroleum system in Mongolia. The volume of potentially trapped oil ranges from 9 to 23 billion barrels of Stock Oil Initially in Place (STOIIP), assuming trapping efficiencies of 10% to 25%. Further upside potential exists in the deeper Permian-Jurassic play, which is analogous to the prolific systems in the western Chinese basins. The remaining six other sub-basins and other areas with limited data coverage will be the focus of future new seismic acquisition to determine their prospectivity potential."
Above is from Nov 2016 PETEX presentation.
Taats and Tugrug in Block V are 2 of those 6 basins.
You can see the massive Upside here and why many folks want to hold or Buy in.