摘要
阐述了奥陶系油藏定容性储渗体油水渗流中的驱动力,是油水密度差产生的重力和随地层压力下降裂缝—溶孔溶洞系统的压缩和原油体积膨胀产生的驱动压差。因此可利用定容性储渗体易恢复地层能量和油水易重新分布的渗流特征,在定容性储渗体实施注水替油技术。以T416井为例,结合分析定容性储渗体注水替油生产特征,进一步优化定容性储渗体注水替油技术,结果表明,注水替油是提高采收率有效的技术手段,提高了油田整体开发水平和总体经济效益;注水后150h油水即可重新运移分布,时间较短;开井生产阶段,优化生产参数,降低底水锥进速度。在此基础上,对下步较大规模缝洞储集体的注水开发具有一定的指导意义。
The driving force in oil/ water percolation of Ordovician karst reservoir in Tahe Oilfield was described, it is the driving pressure differential produced by gravitational diversity causing density of oil-water, and the compress of fractures-cavities system going with declining formation pressure, and the volume expanding of crude oil. In accordance with the characteristics of reservoir and percolation body with constant volume, the principles of water-flooding and replacing oil technology are developed to better understand the producing performance of the reservoirs and seepage mechanism. Taking well T416 as example, the paper analyzed the production features of water-flooding and replacing oil in reservoir and percolation body with constant volume, and optimized the water-flooding and replacing oil technology. Application results showed that using water-flooding and replacing oil technology was an effective method for EOR, and total economic benefit of the reservoir. Furthermore, the research has direction significance for water-flooding development in cave-fracture carbonate reservoir.
出处
《钻采工艺》
CAS
北大核心
2007年第5期30-32,共3页
Drilling & Production Technology
关键词
塔河油田
定容性储渗体
注水替油
注水开发
Tahe oilfield, reservoir and percolation body with constant volume, water-flooding and replacing oil, water-flooding development
