It first appeared in 1967, the "Berne Convention" Stockholm text, expressed as a result of the three conditions, so it is called three-step test.
它最早出现在1967年的《伯尔尼公约》斯德哥尔摩文本中，因表述为三个条件，故被称为三步检验法。
They also were measured while stepping as far as they could in three directions: forward, to the side and backward (the maximal step length test).
还要测试他们最大限度地向三个方向跨步，向前、向侧和向后(最大的步长测试)。
These three kinds of techniques of well testing, step rate test and injection test at pre-fracturing are conducted to acquire formation parameters and applied in one CBM well successfully.
将地层测试、升排量注入与压降测试、注入与压降测试三种测试工艺在煤层气井压裂前实施，以获取地层参数，并将这三种方法在同一口煤层气井上成功进行了应用。
These three kinds of techniques of well testing, step rate test and injection test at pre-fracturing are conducted to acquire formation parameters and applied in one CBM well successfully.
将地层测试、升排量注入与压降测试、注入与压降测试三种测试工艺在煤层气井压裂前实施，以获取地层参数，并将这三种方法在同一口煤层气井上成功进行了应用。
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