海外油气勘探资产技术经济评价思路与方法

海外勘探资产的技术经济评价是项目可行性研究的核心内容，是一项复杂的系统工程。针对海外油气勘探资产技术经济评价面临着资产类型复杂、不确定因素多、评价时间较短且资料有限、技术评价难度大等多项挑战，提出了海外勘探资产全周期技术经济评价的总体思路和评价流程；并以中等勘探区块为例，深入剖析了地质与资源评价、概念性开发工程评价、钻采/地面工程评价、经济评价和风险评价等5个核心评价环节。在此基础上，将勘探资产根据勘探程度的高低分成前沿勘探区块、低勘探程度区块、中等勘探程度区块和高勘探程度区块4类，提出不同勘探程度区块的评价重点。结合实际工作经验，对海外勘探区块的权益股份、勘探期安排、义务工作量以及勘探区块进入时机确定等常见问题给出具体解决方案。

Methodology of technical and economical assessments of oversea exploration blocks

As a very complex system engineering,technical and economical assessments are the core part of project feasibility studies in acquiring oversea exploration blocks.In view of various challenges faced in the technical and economical assessment,such as complex types of blocks,multiple uncertainties,urgent demand of assessment,limited data,great difficulties in technical assessment,etc.,the present paper proposed a general idea and methodology of the whole-circle technical and economical assessment of oversea exploration blocks and took a medium-size exploration block as an example to deeply investigate five key assessment parts,such as geology and resource assessment,engineering assessment in conceptual development,drilling/surface engineering assessment,economical assessment and risk assessment.On the basis of these,exploration blocks were classified into four different types according to their degrees of exploration,i.e.frontier exploration block,immature exploration block,medium exploration block and mature exploration block,moreover,assessment emphases for each type of blocks were proposed as well.Finally,integrated with the past assessment practice,the paper recommended some detailed solutions to issues frequently encountered in technical and economic assessments of oversea exploration blocks,such as block equities,arrangement of exploration period,obligatory and timing of block acquisition.