The existing temporary plugging evaluation methods cannot simulate the pumping process and plugging process. To quantitatively evaluate the plugging effect of the knot temporary plugging agent, based on the high-pressure delivery system of the temporary plugging agent and the plunger pump system, it carried on the ground simulation test. The results showed that the knot temporary plugging agent had an excellent plugging performance. The numerical simulation method calculated the flow field, and the velocity field and pressure field with the different number of perforations and different displacements were analyzed. When the number of perforations was few, the total flow rate, the flow rate through the perforation, and the negative pressure were significant. But the suction force on the temporary plugging agent was too large, which may lead to the failure of the temporary plugging agent. For 12 perforations, when the flow was small, the negative pressure at the perforation was too small to suck the temporary plugging agent into the perforation. For 12 perforations, when the flow was 2 m³/min, the maximum speed of the perforation was 47.5 m/s, and negative pressure of 1.25 MPa was formed inside the perforation relative to the wellbore. The negative pressure could effectively suck in the temporary plugging agent. The research results can provide a theoretical basis for the optimization of the fracturing temporary plugging process.

现有的临时堵漏评价方法无法模拟抽水过程和堵漏过程。为定量评价节点暂堵剂的堵漏效果，基于暂堵剂高压输送系统和柱塞泵系统，进行了地面模拟试验。结果表明，结节暂堵剂具有优良的堵漏性能。采用数值模拟方法计算流场，分析了不同穿孔数和不同位移下的速度场和压力场。当穿孔数量较少时，总流量、通过穿孔的流量和负压显着。但对临时堵漏剂的吸力太大，可能导致临时堵漏剂失效。12个射孔，当流量较小时，射孔处的负压太小，无法将暂堵剂吸入射孔。对于 12 个射孔，当流量为 2 m 时³ /min，射孔最高速度为47.5 m/s，射孔内相对于井筒形成1.25 MPa的负压。负压可有效吸入暂堵剂。研究成果可为压裂暂堵工艺优化提供理论依据。