The conclusion is:
The petro-aid was largely consumed, nearly all in imports. It did not lead to a measurable increase in growth, prices, or an appreciation of the exchange rate. Imported goods during the aid surge shifted away from capital goods and towards non-capital goods, and aid crowded out domestic savings. A significant share of the aid fled the country in unaccounted transactions.
The study was done by E. Werker et al. is available here.