层内纵向强非均质性低渗油藏产能评价方法--以恩平凹陷M油藏为例  

Productivity evaluation method of strongly longitudinal heterogeneous reservoir within layers-by taking M reservoir of Enping sag as an example

作　　者：侯博恒 谢明英 李伟 宋伟 孙晓娜 HOU Boheng;XIE Mingying;LI Wei;SONG Wei;SUN Xiaona(Shenzhen Company of CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518000,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《石油地质与工程》2022年第5期57-60,共4页Petroleum Geology and Engineering

基　　金：中海石油(中国)有限公司科技项目“复杂海相砂岩油藏挖潜关键技术研究”(CNOOC-KJ-135-ZDXM37-SZ-03-SZ)。

摘　　要：针对层内纵向强非均质性低渗油藏采用测井解释平均渗透率预测产能偏低的问题,运用分段产能评价方法,将油藏纵向分为不同小段,利用区域不同渗透率级别下流度与比采油指数的关系计算各段产能,再根据水电相似原理并联求取油藏产能。研究结果表明,对于层内纵向强非均质性油藏,不同渗透率级差下,层内流线分布差异较大,建议分段产能评价时不同小段的渗透率级差大于5。实例分析表明,采用测井解释平均渗透率预测的产能仅为测试产能的2.4%,分段产能评价方法的预测结果为测试产能的1.2倍,提高了该类油藏产能的预测精度,对推动海上类似油藏的开发动用具有重要意义。In view of the low productivity predicted by logging interpretation of average permeability in the vertically highly heterogeneous low-permeability reservoir,the reservoir is vertically divided into different subsections by using the subsection productivity evaluation method.The productivity of each section is calculated by using the relationship between mobility and specific productivity index at different permeability levels in the region,and then the productivity is calculated in parallel according to the principle of hydropower similarity.The research results show that for the vertical highly heterogeneous reservoir within layers,the distribution of flow lines in the layer varies greatly under different permeability ranges.It is suggested that the permeability range of different segments should be greater than 5 in the subsection productivity evaluation.The example analysis shows that the productivity predicted by the average permeability of logging interpretation is only 2.4%of the test productivity,and the prediction result of the subsection productivity evaluation method is 1.2 times of the test productivity,which improves the prediction accuracy of this kind,and is helpfulfor the development and production of similar offshore reservoirs.

关 键 词：产能 非均质性 分段 流度 比采油指数 

分 类 号：TE348[石油与天然气工程—油气田开发工程]