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项目投资的收益具有不确定性，因而投资具有风险性。项目投资风险因项目的类型，所处领域不同而不同，即使是同一类型的项目也会因为投资规模、投资环境、预期市场的不同而具有一定的差异性，这就增加了对项目投资风险进行分析评价和决策管理的难度。文章在建立了石油建设项目投资风险系统的基础上，应用现金流量模型与蒙特卡洛仿真法，探讨了如何在石油建设项目前期工作中进行风险分析评价。

A Discussion on Investment Risk Evaluation Method for Petroleum Construction Project

??Because the profit on the investment in a project is uncertain,the investment in a project is of risk.The risk of investment in a project is different with the different type of project and different region.Even if the projects are identical,there is a certain difference among them due to the dissimilar investment scale and surroundings and desired market,which increases the difficulty in making the analysis,evaluation and management decision of the investment risk.In this paper,on the basis of establishing the investment risk system of petroleum construction project and by applying cash flow model and Monte Carlo Simuation met hod,how to make the analysis and evaluation of the risk in the preliminary engineering of petroleum construction project is discussed.