Because underbalance pressure differential can cause an opposite direction backflow and flush perforated hole while underbalanced perforating, which formation may avoid to be damaged by hole plugging and perforation fluid, and which also can reduce compaction degree.
在负压射孔的瞬间,由于负压差的存在,可使地层流体产生一个反向回流,冲洗射孔孔眼,避免孔眼堵塞和射孔液对储层的损害,同时还有可能减轻压实作用程度。
参考来源 - 负压射孔完井技术与产能的关系评价·2,447,543篇论文数据，部分数据来源于NoteExpress
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