Meng Yang, Jin Wenyong, Zhang Ke, Ding Weidong, Zhang Yongmin
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.
Rev Sci Instrum. 2024 Sep 1;95(9). doi: 10.1063/5.0226304.
Underwater shock wave technology can realize dynamic rock fracture, which is helpful to increase oil and gas reservoir permeability. It can realize the efficient exploitation of medium and low maturity oil and gas resources. In practical application, the shock wave parameters require not only high intensity but also safety and controllability. To meet these requirements, insensitive composite energetic materials driven by electrical wire explosion plasma were proposed, which is one of the most promising methods. However, when in use, the load assembly process containing wires and energetic materials is complex. In this paper, a new type of energetic material load is proposed, using non-penetrating wire to drive composite energetic material. It can simplify the production process of the energetic load and produce acceptable shock wave parameters. The test results show that both the energy deposition of the wire and the shock wave intensity decrease under a non-penetrating wire structure. However, the shock wave intensity is still higher than that of the underwater electrical wire explosion. Based on schlieren diagnosis, it is found that the composite energetic material is gradually driven, and the energy release is not concentrated. In addition, the "non-wire" structure driving condition was discussed in contrast. Under this condition, the process of ionization channel establishment in composite energetic materials is random. The shock wave intensity is weak because the composite energetic material is in the process of slow detonation.
水下冲击波技术能够实现岩石的动态破裂，这有助于提高油气储层的渗透率。它能实现中低成熟度油气资源的高效开采。在实际应用中，冲击波参数不仅需要高强度，还需要安全性和可控性。为满足这些要求，提出了由电线爆炸等离子体驱动的钝感复合含能材料，这是最有前景的方法之一。然而，在使用时，包含电线和含能材料的负载组装过程很复杂。本文提出了一种新型的含能材料负载方式，采用非穿透电线来驱动复合含能材料。它可以简化含能负载的生产过程并产生可接受的冲击波参数。测试结果表明，在非穿透电线结构下，电线的能量沉积和冲击波强度都会降低。然而，冲击波强度仍高于水下电线爆炸的强度。基于纹影诊断发现，复合含能材料是逐渐被驱动的，能量释放并不集中。此外，还对比讨论了“无电线”结构的驱动条件。在这种条件下，复合含能材料中电离通道的建立过程是随机的。由于复合含能材料处于缓慢爆轰过程中，所以冲击波强度较弱。
