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Exploring the Omens of Kick in Gas Well

��The article considers that the increase of both flow quantity at the mud exhaust pipe and fluid level in the mud pit is the most creditable omen that indicates the natural gas has intruded into water-base mud and the kick will happen.But it is different to the gas cut oil-base-mud.Especially,when the gas invaded contains sour gases such as CO₂ or H₂S,there is often no any show at the two places mentioned above,because the kick is coming as the gas cut oil-base mud returns to the well head.