海上油气田油藏评价的几个关键

KEYS TO RESERVOIR APPRAISAL OF OFFSHORE OIL & GAS FIELDS

海上石油勘探开发具有风险大和投资多的特点,因此油藏评价是一个必不可少的阶段。该阶段的主要任务是利用地震精查—评查、评价井的各种系列测井、RFT、DST和延长测试、岩心和流体分析数据等各项资料,进行综合研究,搞清油藏特征、计算基本探明储量及产能。取得各项资料,是油藏评价的基础;油藏评价尤其是对规模较大、地质情况复杂的油田,应钻一批井进行一次研究,直至搞清油藏特征;工程概念设计和经济评价要与油藏评价同步进行,尤其对边际油藏更要做好工程和经济评价工作。

Reervoir appraisal is essential to offshore petroleum exploitation which is risky and costly.Based upon high-resolution seismics. series of well logging of appraisal wells.RFT,DST and extended testing,cores and fluid analysis data,the evaluation reguires comprehensive study,reservoir character dis discription,calculation of proven resevues and productibility.The evaluation of large-scale and geologically complex fields should be conducted upon completion of every group of wells till the reservoir is well understood.In addi tion.it is suggested in the paper that the evaluation be made simultaneously with engineering conceptual proposal and economic appraisal which are particularly important for marginal fields.