井下高能气体压裂设计数值模拟研究

Numerical Simulation Research on Downhole High Energy Gas Fracturing Design

建立井下火药燃烧及压井液运动等数学模型,利用MATLAB软件模拟分析施工参数(如装药量、射孔密度、压井液高度等)对井下火药燃烧过程的影响,从而利用高温高压气体压裂油层,改善地层渗透性提高石油产量。结果表明:在施工安全的条件下,装药量越大,施工效果越好;射孔密度越小,压井液高度越大,燃气峰值压力越大。为进一步改善压裂效果提供了参考。

Mathematical models of downhole propellants combustion and kill fluid movement were established and the influence of construction parameters such as charge amount,perforation density,and kill fluid height,etc.on the downhole propellants combustion process was simulated and analyzed by MATLAB software to improve formation permeability and increase oil production with high temperature and high pressure gas fracturing reservoir.The results show that under the conditions of construction safety,the greater the charge,the better the construction effect;the lower the perforation density,the greater the kill fluid height,and the greater the peak gas pressure.The study provides a reference for further improving the fracturing effect.