Abstract: In view of the too many temporary plugging agent types and large difference in divert effects in the temporary plugging divert fracturing process, based on the analysis of the temporary plugging agent blocking mechanism, blocking pressures of a variety of temporary plugging agents were determined by using the self-designed dynamic temporary plugging evaluation device. The results show that for narrow fractures ( < 0. 5mm) , low concentration ( 0. 5% ) of particles or composite particles can achieve blocking effect ( composite particle’ s locking pressure can reach 7. 5MPa) . For wide fractures ( > 1 mm) , high concentration of composite particles or particle /fiber combination is required to obtain better blocking effect ( for 2mm fractures, 2% composite particle’ s blocking pressure can reach 5MPa, 1 % fiber + 0. 5% particles' blocking pressure can reach 10 MPa) .When the particles are used alone, the blocking pressure decreases significantly as the fracture opening increases. For the same fractures opening degree, the blocking pressure of the temporary plugging agent increases slightly with the increase of the particle concentration, and the composite particle or the particle /fiber combination can obtain higher blocking pressure than the single particles. The application results in the field S well show that after the composite temporary plugging agent enters the formation, it can effectively block the extension of the fracture in the original fracture direction, and realize the function of opening and communicating the natural fracture system of the formation. 0. 6t of oil has been produced out of the well after the initial acid fracturing, and after the temporary plugging and divert fracturing, the initial daily oil production was 6. 7t, achieving remarkable results. The research results have a certain guiding effect on the optimization and use of the temporary blocking materials.

摘要： 针对暂堵转向压裂工艺中暂堵剂类型多，转向效果差异大等问题，在暂堵剂封堵机理分析基础上，利用自主设计的动态暂堵评价装置，测定多种暂堵剂封堵承压能力，优化暂堵剂类型及其组合。结果表明，对于窄裂缝（＜0.5 ｍｍ），使用0.5％低浓度的颗粒或复合颗粒便能达到有效的封堵效果（复合颗粒承压达7.5 MPa）；对于宽裂缝（＞1ｍｍ），需使用高浓度的复合颗粒或颗粒／纤维组合才能获取较好封堵效果（2 ｍｍ缝宽下，2％复合颗粒承压达5MPa，1％纤维 ＋0.5％颗粒一可达 10MPa）；单独使用颗粒时，随着裂缝开度增加，承压能力有明显的下降；相同裂缝开度下，暂堵剂的承压能力随颗粒浓度增加轻微提升，而使用复合颗粒或颗粒／纤维组合，相比于单一颗粒能够得到更高的封堵承压能力。在现场S井应用结果表明，复合暂堵剂进入地层后，能够有效封堵并阻断原有裂缝方向上的延伸，实现压开和沟通地层天然裂缝系统作用，该研究成果对暂堵转向压裂技术的优选和使用具有一定指导作用。

关键词: 暂堵剂, 转向压裂, 暂堵机理, 实验研究, 参数优化