Early　gas　kick　detection　is　an　important　measure　to　ensure　well　control　safety.　In　this　paper,　firstly,　a　new　two-phase　flow　model　was　developed　to　accurately　describe　the　transient　annular　pressure　responses　at　the　PWD　tool　during　the　gas　influx.　Secondly,　a　Dual-Measured-Points　Early　Gas　Kick　Detection　Method　was　proposed　based　on　the　consistency　and　discrepancy　between　the　pressure　responses　of　two　PWD　tools.　The　results　of　case　research　indicated　that　the　annular　pressure　increased　and　changed　periodically　with　time　in　the　initial　stage　of　gas　kick　and　then　declined　approximately　linearly　after　the　gas-liquid　interface　reached　the　PWD　tool.　Additionally,　the　proposed　gas　kick　detection　method　could　significantly　reduce　the　chances　of　the　gas　kick　misdiagnosis　and　improve　the　reliability　of　the　gas　kick　detection.　Moreover,　the　gas　kick　confirmation　time　(GKCT)　obtained　by　the　proposed　method　was　2-7　min,　and　the　corresponding　gas　kick　confirmation　volume　(GKCV)　was　0.3-0.5　m(3).　The　GKCT　diminished　with　the　increase　in　the　formation　permeability　and　the　bottomhole　pressure　difference　and　with　the　decrease　in　the　borehole　size　and　the　well　depth.