Iran's light crude price fell by 16 cents a barrel to be sold at 44.77 dollars in the week to October 2.
The average price for Iran light crude has been 53.45 dollars this year.
Iran's heavy crude oil price also declined by 16 cents to 42.84 dollars a barrel. The average price for Iran heavy crude was 51.53 dollars this week.
OPEC crude basket price was also sold for 43.86 dollars a barrel in the week under study, showing a 26 cent decline.
The average price for OPEC crude basket has been 52.70 dollars this year.
The price for each barrel of WTC crude also declined by 39 cents to 45.12 dollars a barrel in the week to October 2.
The Brent crude price dropped by 17 cents to 47.13 dollars a barrel and average price for Brent crude has been 55.28 dollars this year.