定向长钻孔水力冲孔卸压增透关键技术参数研究及应用
Key technical parameters and applications of hydraulic perforation for pressure relief and permeability enhancement in directional long borehole
摘要
为解决定向长钻孔长度大、孔径小(长径比大),水力冲孔时,水压沿程阻力损失和局部阻力损失大以及环空较小,排渣困难等问题,本文采用理论分析得到射流压力和流量参数的影响因素,并根据定向长钻孔水力冲孔现场参数构建数值模型,明确不同射流压力和流量对排渣效果的影响,得到以下结论:合理的水压和流量,是保证冲孔直径和顺利排渣的重要前提;在射流压力15 MPa、流量150 L/min时,既能保证冲孔直径,又能保证顺利排渣.
To solve the problem of directional long boreholes with large borehole lengths and small boreholes(large length-to-diameter ratio),large hydraulic resistance loss along the route and local resistance loss during hydraulic perforation,and small annulus and difficult slag discharge,this paper uses theoretical analysis to identify the factors influencing jet pressure and flow parameters.Based on the on-site parameters of hydraulic perforation in directional long boreholes,a numerical model is constructed to clarify the effects of different jet pressures and flow rates on slag discharge performance,yielding the following conclusions:reasonable water pressure and flow rate,It is a crucial prerequisite for ensuring the punch-ing diameter and smooth slag discharge;At a jet pressure of 15 MPa and flow rate of 150 L/min,it ensures both the punching diameter and smooth slag discharge.
年，卷(期)：
2026, 45(10)
分类号：
TD324
机标分类号：
TD712
TD456
TD825.6
在线出版日期：
2026年10月29日
