摘要
五3中克下组油藏属于特低渗透、非均质性较强的砾岩油藏,经过18年的注水开发,目前处在高含水、高采出、低速采油阶段。通过引入流动单元概念,应用测井参数属性提取方法,根据有效孔隙度、有效渗透率、渗流指数三者的关系确定各类流动单元的界限方程,从而划分出该区S74-1层、S74-2层、S75-1层和四类流动单元,再根据各油层流动单元的平面上的展布特点,确定水驱方向优先顺序组合,建立了有效水驱,较好地指导了注水工作。
Wusanzhong T2k1 Formation is a conglomerate oil reservoir with extra low-permeability and stronger heterogeneity. So far, this reservoir is on the stage of high watercut, high recovery and low-velocity oil production after eighteen-year waterflood. The concept of flow unit is introduced to its development. Applying the attribute acquisition of logging parameter, a threshold equation of every flow unit is obtained from the relationship among effective porosity, effective permeability and filtrational index. So, four flow units in three layers such as S4-17, S4-27, S5-17 in this reservoir are classified. In addition, an optimized order of waterflood direction is defined according to planar distribution of flow units for every oil layer, and an effective waterfloor is developed to guide water injection.
出处
《天然气勘探与开发》
2007年第3期40-44,共5页
Natural Gas Exploration and Development
关键词
低渗透油藏
流动单元
水驱
low-permeability oil reservoir, flow unit, waterflood
