according to U.S. EIA, 2017
Iran oil reserves at the beginning of 2001 were reported to be about 99 billion barrels; however in 2002 the result of NIOC's study showed huge reserves upgrade adding about 31.7 billion barrels of recoverable reserves to the Iranian oil reserves. The 2002 NIOC reserve revision came from the following sources: According to Exploration Directorate of
NIOC, there are about 150 unexplored anticlines in Iran. Since 1995, the
National Iranian Oil Company has made significant oil and gas discoveries, standing for some of oil in place and at least of gas in place, which are listed below. In the Zagros and
Persian Gulf Basins the highly porous Cretaceous and Tertiary carbonate rocks make very important oil reservoirs, while Permo-Triassic carbonates, particularly the Dalan and Kangan formations, are the main gas and condensate reservoirs. It is reported that 38 gas/condensate pools have been discovered in the Dalan and Kangan formations in these basins alone. The mid-Cretaceous Sarvak formation is significant for the volume of recoverable oil it holds, while the Oligo-Miocene Asmari formation is the best current producer. ==See also==