(12)--201905GRE--chap1.5气藏工程气藏工程.ppt

1.5 Gas and Gas Reservoir ClassificationGas reservoir gasAccording to the reservoir:Associated gas dry gas wet gas condensate gas1 The classification of natural gasCondensate gas reservoirwet gas reservoir1 The classification of natural gases1-?2-?S-?1 The classification of natural gases According to the composition:dry gas:Wet gas:Lean gas:rich gas:C5+13.5cm3/(m3 produced fluid)C3+100cm3/m31 The classification of natural gases(Source:Stephen A.Holdith,2006,SPE 103356)unconventional gasTight gasCoalbed methaneShale gasGas hydrateconventional gas F-conventional gas reservoir J-undersaturated oil reservoir L-oversaturated oil reservoirtwo-phase A-condensate gas reservoirOne-phase I-saturated oil reservoir2 The classification of natural gas reservoirsSpecific gravity0.600.710.80Types of gas reservoirsDry gas reservoirCondensate gas reservoirWet gas reservoir2 The classification of natural gas reservoirs According to the specific gravity:2 The classification of natural gas reservoirs According to the H2S content:tracelowmiddlehighsuper highH2S(g/m3)0.020.02553030150150770H2S(%)0.00130.00130.30.32.02.010.010.050.02 The classification of natural gas reservoirs According to the CO2 content:tracelowmiddlehighsuper highCO2(%)0.010.012210105050702 The classification of natural gas reservoirs According to the N2 content:tracelowmiddlehighsuper highN2(%)5010500.110300203001202015201015102 The classification of natural gas reservoirs According to the reservoir pressure index:Low pressureconventional pressurehigh pressuregeopressuredpressure index(MPa/100m)1.82 The classification of natural gas reservoirs According to the reservoir depths:shallowmiddledeepsuper deepDepth(m)4000Thank you for your attention!