Study on the applicability of natural gas composition analysis and physical property parameters calculation standards for coal-bed substituted natural gas

It has been studied that the applicability of natural gas composition analysis and physical property parameters calculation standards for substituted natural gas(SNG).As a result, the composition of SNG could be analyzed by GB/T 13610-2014, due to the uncomplicated composition.The physical property parameters, such as superior calorific value, density, relative density and Wobbe index, could be well calculated by GB/T 11062-2014.GB/T 17747.3-2011 is used to calculate the compression factor of natural gas according to the physical property parameters, which is not the usual practice in our country.On the basis of accurate results of SNG composition analysis, GB/T 17747.2-2011 is recommended to calculate the compression factor of SNG under the working conditions by using coal gas composition.