重力火驱比例模拟实验研究

Scale simulation experiment on gravity fire flooding

重力火驱比例模拟实验结果表明,火线形成后受生产压差及气体超覆影响,同时向水平井方向、向上方及侧上方扩展,但向生产井拓展的趋势明显。水平井注水蒸汽与开启排气井两种调控方法可以防止火线突破水平井,扩大火线波及范围。重力火驱比例模拟实验生产阶段可划分为:预热阶段、点火阶段、火线拓展阶段、火线调整阶段和气驱阶段。

The results of scale simulation experiment on gravity fire flooding show that the firing line extends to the horizontalwell,upward and side faces,which is affected by pressure difference and gas coverage. Steam injection and exhaust shaft areimplemented to prevent the line beyond the horizontal well. The production process in the experiment involve:preheating,ignition,line extending,line adjustment and steam flooding.