Increase in Economic Stability of Oil and Gas Regions due to Development of Hardly Removable Inventories
In oil balance of the country nearly two thirds of recoverable reserves belong to hardly removable(TIZ) and by types constitute: heavy - more than 16 %, concentrated in low-permeable collectors - 41,7 %, high-sulphurous - more than 2 %, high-viscosity - 11 % and in subgas deposits - about 8 %. Quite often these types of TIZ are combined. Rates of a surplus of TIZ increase from year to year