在实验室条件下，用同种内置式复合射孔器单元在4种不同的靶上进行射孔并测试环形空间p-t曲线，然后检测靶体。通过实验结果的对比分析表明：相同的内置式复合射孔器单元在不同的靶上射孔时的p-t曲线不同，靶越致密则气体的峰值压力越高，持续时间越长，在孔隙度18．4％、渗透率0．102μm2的砂岩靶上形成了3条长裂缝。靶的性质决定p-t曲线特点，可以利用p-t曲线判断复合射孔效果。%The same type of combined perforator unit perforated in 4 different kinds of targets in laboratory.p-t curves in annulus space and targets were tested .Comparative analysis of the test results show that different targets perforated by the same unit present different p-t curves, in which denser targets have higher peak pressures and longer duration.Three long fractures are generated in the sandstone targets with a porosity of 18.4%and a permeability of 0.102μm2 .Characters of p-t curves, which are responded by the properties of targets , can be used to determine the combined perforation effects .
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