The　commercial　recovery　of　gas　hydrate　(GH)　remains　challenging　due　to　low　production　rates　and　high　operational　costs.　This　study　explores　the　feasibility　of　three-gas　co-production　(TGCP)　as　a　viable　method　for　enhancing　gas　production＇s　efficiency　and　economic　viability　by　integrating　the　exploitation　of　GH,　shallow　gas,　and　deep　gas　simultaneously.　Using　field　data　from　Site　W8　in　the　Qiongdongnan　Basin,　South　China　Sea,　as　a　geological　model,　we　conducted　experimental　trials　and　comprehensive　numerical　simulations　to　assess　the　long-term　performance　of　TGCP.　Results　demonstrated　that　TGCP　substantially　improves　gas　production　compared　to　individual/joint　recovery　strategies,　surpassing　the　commercial　production　threshold　of　200,000　m3/day　for　the　first　time　in　this　region.　In　the　early　stages　of　production,　deep　gas　compensates　for　the　limited　contribution　from　GH　decomposition,　while　in　later　stages,　decomposed　gas　from　GH　supports　production　as　deep　gas　declines.　Compared　with　traditional　deep　gas　exploitation,　the　TGCP　can　extend　the　deep　gas　development　cycle.　Sensitivity　analysis　revealed　that　reducing　bottom　hole　pressure　promotes　gas　hydrate　decomposition,　while　higher　permeability　(∼100　mD)　and　extended　production　periods　further　enhance　output.　We　also　developed　an　economic　evaluation　framework　incorporating　the　gas-water　ratio　(RGW),　energy　return　on　investment　(EROI),　and　profit　time.　The　analysis　showed　that　TGCP　maximizes　RGW　and　EROI　while　extending　profitability,　especially　under　lower　BHP　conditions.　It　was　confirmed　that　the　TGCP　model＇s　potential　to　significantly　boost　GH　recovery　rates　and　provide　valuable　insights　into　its　future　commercial　applications　in　hydrate-rich　regions　such　as　the　South　China　Sea.　Our　findings　offer　a　promising　pathway　toward　commercializing　GH　exploitation　through　TGCP.　©　2025