During exploration, exploitation and production, a whole lot of petroleum project construction need to be finished, ac-cordingly a large monetary investment need to put in. It is vital to sustainable development and evading investment risks of petro-leum enterprise that how to evaluate projection construction and control capital investment effectively. Taking a light hydrocarbon station in Tahe Oilfield for example, this paper analyzes the investment evaluation of volatile gas recovery, flare gas recovery and light hydrocarbon recovery, summarizes the significances of investment evaluation, and finally presents some investment evalua-tion methods.%在油田的勘探、开发和生产等各个阶段都伴有大批的项目建设和大量的资金投入，若前期未对建设项目进行有效评价，有可能会造成大量的资金浪费。以塔河油田某轻烃站挥发气、火炬气回收及增加轻烃处理能力等工程为例，就如何更好地评价建设项目、控制资本投入详细描述项目投资评价的应用效果，实现油田企业可持续发展、规避油田投资风险。
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