石油储量升级效益评价方法研究

预测储量和控制储量是否可升级与油藏地质认识、技术配套、经济效益高度相关，尤其在低油价下区块经济性成为制约升级的关键因素。为了从大量区块中快速筛选出经济有效的区块，结合区块储量特点，研究了计算单井经济界限的方法，构建了单井经济界限现金流模型和计算流程。该方法普遍适用于保有储量和新增储量的经济性判断，也可应用于不同勘探开发阶段项目评价中，可为高效勘探和效益开发提供技术支撑。以中国石化某地区特低渗透油藏为例，评价了油价为40, 50, 60, 70, 80美元/桶下，与效益相关的潜力储量分别为0.5，0.8，1.2，1.6，1.7亿吨。

Evaluation methods for oil reserve upgrading

Whether the predicted and controlled reserves can be upgraded is highly related to factors such as geological understanding of reservoir, technical support, and economic benefits. Especially at low-oil-price periods, the block economy has become a key factor restricting the upgrade.In order to quickly screen out economical and effective blocks from a large number of candidates, combined with the characteristics of reserve blocks, the method of calculating the economic limit of a single well is studied, and a cash flow model and calculation process of the economic limit of a single well are proposed.This method is generally applicable for the economic judgment of retained reserves and newly added reserves, moreover, it can also be applied to the evaluation of exploration and development projects at different stages, providing technical support for efficient exploration and profitable development as well.Taking an ultra-low permeability oil reservoir in a certain area of SINOPEC as an example, it is estimated that the potential reserves related to benefits are (50,80,120,160,170)×106 t at oil prices of 40,50,60,70,80 USD/bbl.