关键词: 未探明储量, 折算探明系数, 经济风险系数, 价值评估

Abstract: Evaluation of reserve is a key part in acquisition of overseas oil and gas assets. How to appraise the non-proven reserve is a key issue in the evaluation efforts. Non-proven reserve refers to the reserve other than proven reserve, including probable reserve, possible reserve and other reserve (such as the amount of resources), with the uncertainties at various levels. Based on analysis and summarization of the uncertainties of non-proven reserve and the evaluation problems, this article compares a large amount of results achieved in appraising non-proven reserve and makes a statistical study in this area, coming up with the dual-factor cash flow method and implied reserve value discount method to evaluate non-proven reserve. The calculation model for the equivalent proved factor and economic risk factor evaluation of non-proven reserve is adopted to partly solve the problem of inaccurate estimated value of non-proven reserve.

Key words: non-proven reserve; equivalent proved factor; economic risk factor; evaluation