【摘要】 针对延长油田压裂水平缝水平井地层压力逐渐降低、能量供给不足等特点，文章对注水吞吐补充地层能量方式的参数敏感性进行了分析，研究表明，不同注入速度影响地层压力恢复速度，但对注水吞吐效果的影响较小；累积注入量并非越高越好，注入量偏低时可能注水蓄能补充能量不足，但注入量过高时，可能会造成重新开井含水率过高或沿着压裂裂缝造成邻井水淹；闷井后油藏中存在地层压力降低、再平衡的过程，因此建议闷井时间15～30d。在此基础上提出了注水吞吐选井方法，对两口水平井现场实施参数进行了设计。更多还原

【Abstract】 In view of the characteristics of gradually decreasing formation pressure and insufficient energy supply in horizontal wells with horizontal fractures in the Yanchang Oilfield,the sensitivity analysis of water injection huff and puff to supplement formation energy was analyzed. The study showed that different injection rates affect the formation pressure recovery speed,while has little effect on the incremental oil. The higher cumulative injection volume doesn’t mean higher incremental oil. When the injection volume is low,the water injection may be insufficient to supplement the energy.However,when the injection volume is too high,the water channeling may happen. When water injection stopped,there is a process of formation pressure reduction and rebalancing in the reservoir,so it is recommended that the well should be shutting down for 15 to 30 days after water injection completed. On this basis,the on-site implementation parameters of water injection huff and puff for two horizontal wells were designed.更多还原