Abstract:

According to the current standard used in China,the geological reserves can be divided into three categories: proved reserves,controlled reserves and prognostic reserves Seemingly, these reserves can be approximately correlated with the proved,probable and possible reserves commonly used in the world However there are remarkable differences in actual operation The essential difference is that economic factors has scarcely or seldom been considered For the sake of being coincide with those practiced in the world, it may be imperative to list commercial recoverable reserves in our reserves report Except applying the successive subtraction method to production prediction while evaluating the commercial recoverable reserves,various parameters should also be considered,such as operational cost and expenditure, expenses of taxation associated with production, development investment, prices of oil products, discount rate,and etc This method has been used to analyze and predict the commercial recoverable reserves in Dongxin oilfield The result shows that the magnitude of remaining commercial recoverable reserves has been affected by the regular pattern of production decline,but it has most obviously been affected by oil prices, especially when the oil price is lower than $20 (US)/bbl.

Key words: remaining commercial recoverable reserves, evaluation, geological reserves, classification, Dongxin oilfield