油气预测储量区块升级评价方法

Improving evaluation of predicted hydrocarbon reserve zones

以油气预测储量区块为研究对象,以优选区块升级为目的,提出了升级性评价方法、升级率评价方法、经济评价方法及综合评价方法。研究提出:升级难易程度指数值用于升级性定量评价;升级概率值用于升级率评价;贴现现金流法计算的储量价值用于经济评价。综合评价则利用升级难易程度指数值、升级概率值、经济价值"一维排队,三维优选"。利用综合评价值,将预测储量区块分为可升级并获得大中规模储量区块、可升级并获得中小规模储量区块、需要评价研究升级的储量区块、暂不升级的储量区块4类,便于勘探决策。

Predicted hydrocarbon reserves were studied,and four evaluation methods for improving reserve estimates were proposed,including possibility evaluation,upgrading rate evaluation,economic evaluation and comprehensive evaluation. A difficulty index was used to evaluate the possibility of reserve upgrading. Reserve upgrading probability calculation and test were used to evaluate the upgrading rate. A discounted cash flow method was applied in the economic evaluation. The difficulty index,probability calculation and economic methods were jointly used in the comprehensive evaluation. The predicted hydrocarbon reserve blocks were classified into four types according to the comprehensive evaluation,including the blocks with large or medium potential for upgrading,the blocks with medium or small potential for upgrading,the blocks remaining for evaluation,and the blocks not to upgrade at present.