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这类压力卡片曲线,多数为第三系地层,其特点为:1.测试产量大于20方;2.日产能力大于5方;3.千米产能小于10方;4.表皮系数大多数为负值;5.堵塞比小于1。
Such pressure card curve, most of the Tertiary stratigraphy, which is characterized by: 1. The test output is greater than 20 square; 2. Nissan capacity of more than 5 parties; 3. Km capacity less than 10 parties; 4. Most of the skin factor is negative Value; 5 blockage ratio less than 1.