浅析普通稠油油藏注水开发后期几点做法及认识

On some methods and insight in the late waterflooding development in common heavy oil reservoirs

八面河油田面4区位于八面河油田主体构造带中部,油藏类型为是一个浅层、特高孔、中高渗、常温常压、普通稠油Ⅰ类构造一岩性油藏。该区块沙三段经历35年的注水开发,受层间、平面非均质以及老井井况恶化、高水等影响,开发上呈现储量失控严重,水驱效率低的现状。十三五期间该单元通过开展油藏精细描述,找准层间及平面剩余油富集区,采取新老井结合方式重构井位,实现特高含水期老区开发稳中有升的开发效果。

Mian4 area of Bamianhe Oilfield is located in the middle of its main structural belt,Its reservoir type is a shallow lithologic reservoir of common heavy oil Ⅰ-class structure characterized by extra-high porosity,medium and high permeability,normal temperature and pressure.After 35 years of water injection development,the Sha-3 Member of the area has been affected by the inter-laminated and planar heterogeneity,the worsened old well conditions and high water flooding,etc.,so the reserves are seriously out of control and the water flooding efficiency is low.During the 13th Five-Year Plan period,we carried out refined reservoir description,identified the inter-laminated and planar remaining oil rich areas,and re-arranged well locations by combining new and old wells,so as to achieve stable and rising development effects in the old area in the ultra-high water cut period.