超正压射孔增产效果显著

• 作 者: 吴月先
• 出 处: 钻采工艺
• 发表日期: 2003年03期
• 关键词: 正压射孔 负压射孔 增产效果 地面测试 深穿透 天然气产量 近地层 排驱 渗透率

超正压射孔具有很明显的实用性和科学性 ,井筒内的超正压是靠泵注液氮来实现的 ,利于炮弹燃爆后深穿透射孔 ,利于射孔后高排驱能力条件下孔眼附近地层解除堵塞 ,气化的氮气易排出井筒、不损害地层的渗透率 ,因而超正压射孔较常规的负压射孔的效果显著。天东 5 - 1井、天东 72井

Overpressure injection holes have obvious practicality and scientificity. The overpressure in the wellbore is achieved by injecting liquid nitrogen into the wellbore, which facilitates the penetration of the deep penetrating holes after the blasting of the projectile, which is beneficial to the high displacement capability after perforation Under the condition that the formation near the perforation is unblocked, the gasified nitrogen is easy to be discharged out of the wellbore without damaging the permeability of the formation, so that the effect of the overpressure shot hole is more remarkable than the conventional negative pressure perforation. Tiandong 5 - 1 well, Tiandong 72 wells