分为概略研究、预可行性研究、可行性研究三个阶段。
然而，油田在优选提高采收率方案时需要根据实际情况进行经济可行性评价。
However, oil recovery optimization program of the oilfield should be made economic feasibility argument based on its practical situation.
在参考规范性文件基础上，对工程建设进行经济效益、生态效益、社会效益分析，经济可行性评价。
Based on consulting the documents of standardization, analyzing the ecological, economic and social benefit, and assessing the economic feasibility, the results show that the economic...
目的分析小流域的水土保持综合治理费用与效益，为小流域水土保持项目国民经济可行性评价提供借鉴。
Aim to analyze the investment and benefit of the water and soil conservation treatment to provide reference in national economy evaluation for the feasibility of small water-soil conservation project.
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