单2块稠油油藏高含水后期提高采收率对策

针对单家寺稠油油藏主力油层水淹严重，开发效果变差的实际，在重新建立地层，构造、储层及流体模型的基础上，描述出动态油水界面及剩余油富集区，探索出稠油油藏高轮次吞吐高含水后期的挖潜对策，并通过上，下扩散，注氮气调剖等技术，提高老油田注汽质量和强化注汽效果，逐渐形成了一套适合稠油油藏高含水后期的开采方法。

EOR measures in late high water cut stage for heavy oil reservoir of block Shan

In accordance with the problem of serious watered out and poor development efficacy in major heavy oil reservoirs of Shanjiasi, on basis of newly established models of stratigraphy, structure, reservoir and fluids, dynamic oil water contact and abundance zone of residual oil are depicted, and potential tapping measures for late high water cut stage of multi cycles of huff and puff are given. Steam quality and injection effectiveness are improved through increasing perforation, and profile control by nitrogen injection, etc. A set of recovery methods suitable to heavy oil reservoir in late high water cut stage has been gradually formed.