Abstract: At present, evaluation of proved unproducing reserves is virtually an evaluation of incremental benefits following newly-increased investments. Conventional economic evaluation methods available are unable to guide the investment decision-making for development of proved unproducing reserves of each oilfield. Based on geologic evaluation, this paper presents an evaluation method named”meager profit production" (or incremental benefits evaluation method). Based on geologic evaluation results, these reserves are divided into economic Class I and Class II, as well as meager proft production" Class I and Class II that belong temporarily to non-profit reserves. In addition, the procedures for using advanced and practicable measurements to reduce investment and cost for development of proved unproducing reserves are proposed along with relevant operating management modes. These will have profound and immediate significance in activating proved unproducing reserves property. This study aims at activiting existing property, properly evaluating probable economic benefits derived from the reserves so as to serve for making decisions of these investments in Xinjiang oilfields.

Key words: Xinjiang, Proved reserves, Evaluation, Method, Management, Investment