复合射孔压井液运动及影响作用研究

复合射孔施工中，高能气体与压井液之间的相互作用影响着井底压力和压裂效果，准确设计压井液高度及深入研究运动机理是复合射孔施工成功与否的关键。针对目前复合射孔理论研究中，对上部压井液运动研究较少的问题，介绍了复合射孔过程中压井液从火药点火到压裂完成的运动特性，推导了高能气体作用下的压井液体的运动微分方程，分别对复合射孔作业过程中产生的井底压力变化、压井液体上移、损耗能量等几个方面的问题进行了较为全面的研究，从而拓展了复合射孔井底压力效果的判断方法。计算实例分析表明，压井液的合理设计至关重要。

STUDY ON MECHANISM OF GAS AND LIQUID INTERACTION IN COMPLEX PERFORATION

In complex perforation operation，one of the most important factors that influence the bottom hole pressure and the effectiveness of high energy gas fracturing is the interaction between control fluid and high energy gas.The precise design of the height of control fluid determines whether or not complex perforation can success.In this paper，the flow characters of control fluid from the ignition of gunpowder to fracturing completion is simply analyzed，the motion differential equation is derived，the change of bottom hole pressure is comprehensively studied，upwelling of control fluid，and energy loss in the process of complex perforation separately are studied，too，thus，the judgment method of composed perforation effectiveness is put forward.Last，case study proves that the rational design of control fluid is the critical factor in the complex perforation design.