三级装药多级复合射孔技术研究

Research on Composite Perforation Technology with Three-stage Gunpowder Charge

为克服传统复合射孔技术装药量小、二次能量做功效率不高、钢质堵片落入井筒造成污染、射孔器结构设计中射孔弹炸高偏小等缺点,提出三级装药多级复合射孔技术。介绍了三级装药多级复合射孔器的关键技术,采用超慢速火药、三级装药结构、泄压孔优化、破碎堵片技术及三联体药盒设计。地面和井下p-t测试以及其在大庆油田的应用结果表明,与常规的复合射孔及两级复合射孔相比,三级装药多级复合射孔对储层改造效果显著,运用这项技术后产液强度提高明显。

To overcome the shortcomings of conventional composite perforation technology, such as, less charge, lower secondary energy work efficiency, wellbore pollution by steel slices dropping into well, poorer perforation bomb explosion height, we propose multistage composite perforation technology with three-stage gunpowder charge. The key technology of the composite perforator with three-stage gunpowder charge is introduced, it uses ultra slow speed gunpowder, three-stage charge structure, decompression hole optimization, slices broken and triplet kit design. The results of p-t testing at ground and downhole, and the applications in Daqing oilfield show that the multistage composite perforation technology with three-stage gunpowder charge has significant effect in reservoir reformation and obviously improves liquid production intensity compared with the conventional composite perforation.