Method for evaluating reservoir fluid property through gasometry component ratio
A technology for the properties and composition of reservoir fluids, which is applied in earth-moving drilling, wellbore/well components, construction, etc. It can solve problems such as poor interpretation coincidence rate and achieve the effect of flexible use.
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[0064] The method provided by the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited thereto.
[0065] A method for evaluating the properties of reservoir fluids using the ratio of gas components, comprising the steps of:
[0066] 1)I Tn Calculation of series indices
[0067] Methane C detected by gas logging 1 , ethane C 2 , propane C 3 , Butane C 4 (sum of normal isomers) and pentane C 5 The (sum of normal isomers) hydrocarbon parameter is the amount of gaseous hydrocarbon components detected while drilling. The present invention defines and calculates the following set of indices:
[0068] I T1 =1-(C 2 ) / (0.2·(C 1 +C 2 ))
[0069] I T2 =1-(C 2 +C 3 ) / (0.2·(C 1 +C 2 +C3))
[0070] I T3 =1-(C 2 +C 3 +C 4 ) / (0.2·(C 1 +C 2 +C 3 +C 4 ))
[0071] I T4 =1-(C 2 +C 3 +C 4 +C 5 ) / (0.2·(C 1 +C 2 +C 3 +C 4 +C 5 ))
[0072] Substituting the gas measurement compone...
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