基于核磁共振的正韵律厚油层高含水期挖潜室内实验  

Laboratory NMR experiments on tapping the production potential of positive rhythmic and thick oil reservoirs in high water-cut stage

作　　者：姜汉桥[1] 宋亮 张贤松 刘凡[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室 [2]中石油阿姆河天然气勘探开发(北京)有限公司 [3]中海油研究总院

出　　处：《中国海上油气》2014年第6期40-43,共4页China Offshore Oil and Gas

基　　金："十二五"国家科技重大专项"海上稠油高效开发新技术"课题"海上稠油化学驱油技术"子课题"海上油田聚合物驱油藏动态监控与评价技术研究(编号:2011ZX05024-004-07)"部分研究成果

摘　　要：设计了三维平板模型驱替实验和岩心驱替实验,应用核磁共振技术,从孔隙尺度研究了河流相储层高含水后期水平井和注入凝胶2种方法挖潜时剩余油分布规律及不同孔喉波及规律。结果表明,水驱后在顶部(低渗层)布置水平井挖潜,可以对低渗层大孔隙有很好的动用,但剩余油依然主要富集于低渗层以及中渗层的中—小孔隙;注入凝胶段塞可以有效调整吸水剖面,对后续水驱有着重要作用,而且与水平井挖潜相比可以有效动用低渗层的大—中孔隙,对低渗层小孔隙也有动用。By designing the three-dimension physi- cal-model experiment and core flooding experiment and using the technique of nuclear magnetic reso- nance （NMR）, the remaining oil distribution and various pore-throat conformances were researched from the pore size for fluvial-facies reservoirs when tapping their production potential by horizontal- well development and gel treatment. The results show that： （1） Drilling a horizontal well in the top interval （low-permeability layer） after waterflood- ing may efficiently exploit large-pore oil in the low- permeability layer, but the remaining oil will still be concentrated in mid-small pores within the low- or mid-permeability layers; （2） Gel slug injection will be effective in the injection profile modification that has an important effect on the subsequent wa- terflooding, by which large- or mid-pore oil and some small-pore oil in the low-permeability layer can be exploited efficiently.

关 键 词：河流相油藏 孔隙尺度 高含水期 三维平板模型驱替实验 岩心驱替实验 核磁共振 剩余油分布 

分 类 号：TE323[石油与天然气工程—油气田开发工程]