摘要
针对特低渗透油藏层数多、平面及纵向非均质性严重的问题,以X区块为例,在分析研究区物性参数基础上,对研究区含水率空间分布规律及含水率与采出程度关系曲线进行了分析,特低渗油藏空间水淹程度差别较大。水驱规律曲线综合考虑储层非均质性、油藏各向异性对采收率的影响,利用2种水驱规律曲线对采收率进行了预测。最后,根据研究区两相渗流规律得出无因次采油、采液指数随含水率的变化规律,不同含水时期提液措施对提高产油量贡献不同。研究表明,X区块空间水淹程度不同,但整体开发效果较好;水驱规律曲线预测平均采收率为27.14%;目前开采条件下,提液对提高采油量贡献较大;综合分析区块整体开发效果较好。
Aiming at the problems for ultra-low permeability reservoirs＇ multiple layers and serious heterogeneity in plane and vertical, taking block X as an example, on the basis of analysis on physical properties in study area, the spatial distribution law of water cut and the curve of water cut and recovery were analyzed.Spatial water flooded degree of extra low permeability reservoir is largely different. Water flooding rule curve has considered the effect of reservoir heterogeneity, anisotropy of reservoir recovery. The recovery was predicted by using two kinds of water flooding rule curve. Finally, according to the laws of two-phase flow in the study area, the law of dimensionless oil, mining fluid index variation with moisture content was obtained. Liquid production increase measures have different contribution to oil production in different aqueous periods.
出处
《当代化工》
CAS
2015年第8期1858-1861,共4页
Contemporary Chemical Industry
基金
东北石油大学基金项目
特低渗透油藏精细注水方案研究
项目号:YJSCX2015-013NEPU
关键词
含水率
采收率
产液量变化规律
开发效果评价
Moisture content
Recovery
Liquid production variation
Development evaluation
