小规模断块油藏化学驱井网优化调整——以王集油田W17断块为例

Optimization and adjustment of chemical flooding patternin small-scale fault-block reservoirs——by taking fault block Wang 17 of Wangji Oilfield as an example

河南油田适合化学驱的Ⅰ、Ⅱ类整装油藏已基本动用,并取得了较好的增油效果和经济效益;Ⅰ、Ⅱ类油藏中的小规模断块油藏受构造复杂、储量规模小、井网调整困难等条件限制,还未实施化学驱。化学驱能够进一步提高小规模断块油藏的采收率,井网优化调整是保障化学驱效果的关键。通过使用数值模拟技术,对王集油田W17断块化学驱井网进行了系统的研究,明确了合理井网形式、合理注采井距、油井与断层的合理距离等关键指标,为该区块开展化学驱的井网优化奠定了坚实基础,也为同类型油藏化学驱井网调整提供一定的借鉴。

Class I and II integrated oil reservoirs suitable for chemical flooding in Henan oilfield have been basically utilized and good oil increase effect and economic benefits have been achieved.The small-scale fault-block reservoirs of class I and II have not implemented chemical flooding due to the constraints of complex structures,small reserves and difficult well pattern adjustment.In order to further improve its recovery,the optimization and adjustment of the well pattern becomes the key factor.By using numerical simulation,the chemical flooding well pattern of block W17 in Wangji Oilfield has been studied,and the key indicators such as reasonable well pattern,injection-production well spacing,and distance between oil wells and faults have been clarified,which has laid a solid foundation for the well pattern optimization of chemical flooding in this block,and also provided a good reference for similar reservoirs.