特低渗透油田不稳定注水提高采收率机理探讨  

EOR MECHANISM BY UNSTABLE WATER INJECTION IN ULTRA-LOW PERMEABILITY OILFIELDS

作　　者：范耀[1] 刘易非[2] 李彬刚[1] 黄海[2] 

机构地区：[1]煤炭科学研究总院西安研究院 [2]西安石油大学石油工程学院

出　　处：《天然气勘探与开发》2009年第4期47-48,52,共3页Natural Gas Exploration and Development

摘　　要：由于特低渗储层具有与中高渗储层不同的储层特征,使其在开发过程中常规注水普遍存在油藏原始启动压力高、注水井吸水能力低、波及效率差、低产现象严重等问题。从水动力学角度出发,对不稳定注水提高采收率机理进行了深入探讨,得到的结论能为特低渗透油田的高效开发提供有益的借鉴。As the characteristics of ultra-low permeability reservoirs are different from those of medium-and high-permeability reservoirs,it causes some problems existing in conventional water injection,such as high original starting pressure of reservoirs,low water injection capacity of water injection wells,poor sweep efficiency and low production. The EOR mechanism by unstable water injection is deeply explored in terms of hydrodynamics. The conclusions obtained can provide beneficial reference for efficiently developing ultra-low permeability oilfields.

关 键 词：特低渗储层 不稳定注水 波及系数 驱替效率 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程] TE357