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1、 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
2、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 cPP cccTTT F-conventional gas reservoirccTT J-u
3、ndersaturated oil reservoir L-oversaturated oil reservoirbPP two-phase A-condensate gas reservoircTT bPP cTT One-phase I-saturated oil reservoir2 The classification of natural gas reservoirsSpecific gravity0.600.710.80Types of gas reservoirsDry gas reservoirCondensate gas reservoirWet gas reservoir2
4、 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 reserv
5、oirs 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!