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1、3.1 Gas Reserve and Volumetric Method1 Reserve those quantities of petroleum which are anticipated to be commercially recovered from known accumulations from a given date forwardThe OIIP(Oil Initially In Place)oiwcBSAhN/12 Methods for gas reserve calculation(1)Volumetric MethodData requirementsCalcu

2、lation techniqueslimitations(2)Material-balance MethodDeriveequation for volumetric gas reservoirsmodifiedWater influxCompressibility of connate waterRock Pore Volume2 Methods for gas reserve calculationQuestions (1)How many other methods can be used for gas reserve calculation?(2)How to calculate t

3、he shale gas and coalbed methane reserve?fPVV3 Volumetric methodVolume of the reservoirAhVfThe gas Volume at reservoir conditionsgigfSAhV3 Volumetric methodThe pore Volume AhVppgfgVVS/The gas Volume at standard conditionsgsgfgVVB/gigigsBSAhVG/gigfSAhV3 Volumetric method4 Applications of volumetric m

4、ethodu Early in the life of a reservoir before significant development and productionu applied later in a reservoirs life u confirm estimates from material-balance calculation5 Data needed(1)well logs(2)core analysis(3)bottomhole pressure(4)fluid sample information(5)well testsThank you for your attention!