低含油饱和度底水油藏水平井开发技术——以高浅北区Ng6、Ng7、Ng9、Ng10小层为例  

Horizontal well development technology in low oil saturation bottom reservoir——by taking Ng6,Ng7,Ng9and Ng10layers in northern Gaoqian as examples

作　　者：李本维[1,2] 龚晶晶[1] 雷占祥[3] 骆红梅[1] 李海东[1] 温玉焕[1] 

机构地区：[1]中国石油冀东油田公司,河北唐山063004 [2]中国石油南美公司 [3]中国石油勘探开发研究院

出　　处：《石油地质与工程》2014年第1期74-77,148,共4页Petroleum Geology and Engineering

摘　　要：冀东油田高浅北区Ng6、Ng7、Ng9、Ng10小层是低含油饱和度底水油藏,构造幅度低,油柱高度小,储层疏松,常规定向井不能正常生产。应用水平井和侧钻水平井分三步走能有效开发此类油藏:首先在厚度5 m以上油层顶部"擦头皮"部署油井,避免底水快速脊进;然后在油井高含水时应用水平井化学堵水技术,封堵高水淹井段,迫使底水绕流扩大水驱波及体积;最后当底水全面脊进后时利用CO2吞吐技术,增强原油流动能力,进一步驱替井筒周围残余油。水平井设计是核心,堵水和CO2吞吐为高含水阶段控水增油的保障。Ng6,Ng7,Ng9 and Ng10layers in northern Gaoqian of Jidong oilfield belong to low oil saturation bottom reservoir,with the characteristics of low amplitude structure,small oil column height and porous reservoir,and the conventional directional well can't be used for normal production.By applying horizontal well and sidetracking horizontal well in three steps can effectively develop such reservoirs.Firstly,to deploy an oil well on the top of oil layers with the thickness of more than 5 m and avoid bottom water fast ridge into.Secondly,to apply horizontal well chemical water plugging technology of oil wells in high water cut,block high waterflooded interval and force the bottom water flow around so as to enlarge sweep volume of water drive.Finally,when the bottom water comprehensively cresting,by using CO2stimulation technology to enhance the capacity of oil flow and further displace residual oil around the wellbore.Horizontal well design is the core,water plugging and CO2stimulation provide the guarantee for water control and increased oil in high water cut stage.

关 键 词：冀东油田 低含油饱和度底水油藏 水平井 开发技术 CO2吞吐 

分 类 号：TE345[石油与天然气工程—油气田开发工程]