摘要
水平井分段多簇压裂技术现有研究主要围绕稳定流体压力作用展开,波动流体压力激励下的储层动应力响应规律尚不清晰。为此,考虑动力因素影响,建立了多簇压裂过程波动流体压力激励下储层应力响应规律仿真模型,分析了簇间距、簇数量及波动流体压力变化频率对储层应力响应规律的影响。研究表明,簇间距、簇数量及流体压力变化频率对于储层内诱导应力场影响明显:随着簇间距的提高有效应力扰动区域先减小后增大,而随着簇数量及流体压力波动频率的提高有效应力扰动区域逐渐减小。上述研究结果可以为水平井分段多簇压裂的施工方案设计提供理论指导。
The existing research on staged multi-cluster fracturing in horizontal wells mainly focuses on the effect of steady fluid pressure,and the dynamic stress response rule of reservoir under fluctuating fluid pressure is still unclear.Therefore,a simulation model of reservoir stress response rule under fluctuating fluid pressure in the process of multi-cluster fracturing was established through the consideration of the dynamic influence factors,and the effect of cluster spacing,cluster number and fluctuation frequency of fluctuating fluid pressure on the reservoir stress response rule was analyzed.The results showed that the cluster spacing,cluster number and fluctuation frequency of fluid pressure had obvious effects on the induced stress field in the reservoir.Among them,with the increase of cluster spacing,the effective stress disturbance region first decreases and then increases,while the effective stress disturbance region decreases gradually with the increase of the cluster number and the fluctuation frequency of fluid pressure.The above research results can provide a theoretical guidance for the design of the operation scheme for staged multi-cluster fracturing in horizontal wells.
作者
顾莹
Gu Ying(Toutai Oilfield Limited Company of Daqing Oilfield Limited Company)
出处
《采油工程》
2022年第4期20-26,81-82,共9页
Oil Production Engineering
关键词
水力压裂
分段多簇
波动流体压力
动应力
仿真模型
hydraulic fracturing
staged multi-cluster
fluctuated fluid pressure
dynamic stress
simulation model
作者简介
顾莹,1985年生,女,工程师,现主要从事措施工艺方案设计、技术研究、新工艺推广工作。邮箱:guyl@petrochina.com.cn。
