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聚能射孔弹射孔后产生射孔孔道 ,同时形成射孔压实带 ,压实带是射孔损害最重要的组成部分 ,严重影响油井产能。用实验手段对压实带进行了研究 ,实验用靶为标准贝雷砂岩靶 ,在APIRP4 3(第五版 )标准中第四章的标准实验条件下进行负压射孔 ,并进行流动测试。射孔流动实验后对靶体做了核磁共振、扫描电镜、电子探针、粒度分析等实验。结果证实 ,压实带区域颗粒接触紧密 ,孔隙连通性变差 ,小碎屑大量增加 ;由孔道入口到顶端压实带颗粒直径有增大的趋势 ,表明射孔损害程度降低 ;压实带中未发现爆轰残留物 ,杵体的主要成份为铜的氧化物。研究工作不仅进一步认识了压实带 ,并对聚能射孔弹的研制、射孔参数的优化设计提供了指导
After the perforation holes are gathered, perforation holes are formed, and at the same time, perforation compaction belts are formed. The compaction belt is the most important component of perforation damage, which seriously affects the well productivity. The compaction zone was studied experimentally, and the target was a standard Berea sandstone target. Under the standard experimental conditions in Chapter 4 of APIRP 43 (5th edition), negative pressure perforation was carried out and the flow test was carried out. Perforation flow experiments on the target after the nuclear magnetic resonance, scanning electron microscopy, electron probe, particle size analysis and other experiments. The results confirm that the particles in the compacted zone are in close contact with each other and the pore connectivity deteriorates and the small debris increases greatly. The diameter of the particles increases from the entrance to the top of the compaction zone, indicating that the degree of perforation damage decreases. No detonation residue was found, the main component of the body is copper oxide. The research work not only further comprehended the compaction zone, but also provided guidance for the development of the perforating projectile and the optimal design of perforation parameters