张伟, 海刚, 张莹. 塔河油田碳酸盐岩缝洞型油藏气水复合驱技术[J]. 石油钻探技术, 2020, 48(1): 61-65. DOI: 10.11911/syztjs.2019124
引用本文: 张伟, 海刚, 张莹. 塔河油田碳酸盐岩缝洞型油藏气水复合驱技术[J]. 石油钻探技术, 2020, 48(1): 61-65. DOI: 10.11911/syztjs.2019124
ZHANG Wei, HAI Gang, ZHANG Ying. Gas-Water Composite Flooding Technology for Fractured and Vuggy Carbonate Reservoirs in Tahe Oilfield[J]. Petroleum Drilling Techniques, 2020, 48(1): 61-65. DOI: 10.11911/syztjs.2019124
Citation: ZHANG Wei, HAI Gang, ZHANG Ying. Gas-Water Composite Flooding Technology for Fractured and Vuggy Carbonate Reservoirs in Tahe Oilfield[J]. Petroleum Drilling Techniques, 2020, 48(1): 61-65. DOI: 10.11911/syztjs.2019124

塔河油田碳酸盐岩缝洞型油藏气水复合驱技术

Gas-Water Composite Flooding Technology for Fractured and Vuggy Carbonate Reservoirs in Tahe Oilfield

  • 摘要: 塔河油田碳酸盐岩缝洞型油藏经水驱在高部位形成了大量的“阁楼油”,而用氮气驱替“阁楼油”时,由于横向驱动作用弱,在井间富集了大量剩余油。为此,根据塔河油田碳酸盐岩缝洞型油藏储层特征及剩余油分布特征,进行了气水复合驱技术研究。在利用物理模拟试验分析气水复合驱油机理的基础上,根据剩余油分布特征,构建了气水复合驱开发模式;根据井间连通通道的特征,设计了开发井网;利用历史水驱数据和累计注气量,设计了气水复合驱参数。塔河油田4区7个注采井组应用了气水复合驱技术,井组产油量平均增加80.0 t。这表明,气水复合驱中的气驱首先将“阁楼油”驱替到水驱通道,水驱提供横向驱动力再将其驱出,从而提高了剩余油的动用程度。

     

    Abstract: After water flooding, a large amount of “attic oil” will be left in the structural top of fractured and vuggy carbonate reservoirs in the Tahe Oilfield. Due to weak lateral drives, a large amount of remaining oil will be accumulated between wells even with nitrogen flooding. According to the reservoir characteristics and remaining oil distribution features of such reservoirs, a gas-water composite flooding technology was studied. Based on the analysis of gas-water composite flooding mechanisms, different gas-water composite flooding development modes have been established according to the distribution features of remaining oil. Based on the characteristics of inter-well communication pathways, the development well pattern was designed taking into consideration the unique conditions, and gas-water composite flooding parameters were designed from historical water flooding data and the cumulative gas injection volume. The gas-water composite flooding technology was applied in 7 injection-production well group of Block 4 of the Tahe Oilfield, and the oil production of this well group was increased by 80.0 tons on average. The results indicate that gas flooding in the gas-water composite flooding drives the “attic oil” to the water flooding channel first, and then the water flooding provides lateral driving force to transport it out.

     

/

返回文章
返回