The EZReporter Natural Gas Analysis (NGA) Edition includes all of the features of the Standard Edition, and is designed to perform standard Natural Gas and Refinery Gas heating value and related calculations based on compositional analysis by gas chromatography. The results from these calculations are available for flexible reporting, monitoring, trend plotting, and exporting to flow calculators or accounting systems.
Overview
The EZReporter Natural Gas Analysis (NGA) Edition includes all of the features of the Standard Edition, and is designed to perform standard Natural Gas and Refinery Gas heating value and related calculations based on compositional analysis by gas chromatography. The results from these calculations are available for flexible reporting, monitoring, trend plotting, and exporting to flow calculators or accounting systems.
NGA Edition News
- Version 4.0.15.0: Added the EN 15984:1977 Carbon Content and Calorific Calculations with corresponding new component and total results and export variables.
- GPA 2261-20: GPA Midstream has released a new version of the GPA 2261 Standard: GPA 2261-20. The only change from GPA 2261-19 is that the reproducibility formulas for Carbon Dioxide and Ethane were updated.
- GPA 2172-19: GPA Global has reaffirmed the GPA 2172 standard. There were no changes to the actual contents of the standard (calculations, etc.), only to the introductory text, liability clauses, etc. So the EZReporter NGA and NGL Editions fully support GPA 2172-19.
- The GPA 2261-19 standard introduced a detailed Portable Gas Chromatograph Standard Operating Procedure (Appendix D). One of the items recommended is the use of "Historical Data Verification Software". The EZReporter Results Database Module was designed specifically for this purpose. Contact Diablo Analytical for more information.
- The GPA 2261-19 standard is supported as of version 4.0.12.3. This standard primarily addresses the GC method and calibration, which are handled by the chromatography data system. However, the reprodicibility formulas for Carbon Dioxide and Ethane were updated from the values in GPA 2261-13 (all the remaining repeatability and reproducibility formulas were unchanged). These formulas have been updated in the EZReporter standard component database and the default configuration templates that use the GPA 2145-16 data source. Existing configuration files will have to be updated to use the new reproducibility formulas.
- The GPA 2145-16 (SI) data source is supported as of version 4.0.11.4 allowing reporting in SI (metric) units. New configuration templates are included allowing you to create configuration files and reports based on those SI units.
- Note: The GPA 2172-14 standard is identical to the GPA 2172-09 standard with the exception of references to the GPA mailing address and website URL, and an expanded disclaimer. All of the definitions, calculations, and example calculations are identical. Consequently, the EZReporter calculations are performed according to both the GPA 2172-09 and GPA 2172-14 standards.
- Support for the ISO 6976 (2016) standard calorific calculations and ISO 6974-3 oxygen/air correction calculation has been added as of version 4.0.11.2.
- BLM Onshore Regulations: We have written a manual supplement that discusses how EZReporter can be used to help comply with some of the sections of the new “BLM Onshore” regulations for gas measurement. Here is the download link for the manual: https://diabloanalytical.com/ezr/files/BLMOnshoreSupplement.pdf
Additional Resources
Standard Calculations
Standard GPA and ISO Calculations: The EZReporter 4.0 NGA Module can be configured to calculate and report results based on the following industry standards:
- GPA 2172
- ASTM D3588
- ASTM D2598
- GPA 2177
- ISO 6976 (1995)
- ISO 6976 (2016)
- ISO 6974-3 oxygen/air correction calculation.
- ISO 8973
- GPA 2261-03 and 2261-13 Repeatability and Reproducibility*
- GPA 2198-16 Fidelity Plots
- EN 15984:1977 Carbon Content and Calorific Calculations
*Requires Results Database license
With the optional Natural Gas Liquids module you can also calculate NGL / extended analysis reports based on the GPA 2186/2286-02 and 2186/2286-14 standards.
Data Sources
EZReporter 4.0 includes component physical property constants from the following standard data sources that can be used in the NGA calculations:
- GPA 2145-16 (FPS)
- GPA 2145-16 (SI)
- GPA 2145-09
- GPA 2145-03
- GPSA Engineering Data Book
- GPA TP-17
- ASTM D3588-98 (2003)
- ASTM D2598-02 (2007)
- ISO 6976 (1995)
- ISO 6976 (2016)
- ISO 8973 (1977)
- EN 15984:1977
In addition, the component constants can be edited manually to use constants from other data sources.
Calculated Results
The following results are calculated by the EZReporter 4.0 Natural Gas Analysis Module, and can be included in the printed report and exported to text files.
Component Results
- Normalized Mole%
- Normalized Weight%
- Normalized Liquid Volume%
- Gross Heating Value (BTU / ideal cu. Ft.) or Superior Calorific Value (MJ / m^3) on a volumetric basis
- Gross Heating Value (BTU/lbm) or Superior Calorific Value (MJ / kg) on a mass basis
- Gross Heating Value (BTU/gal.)
- Superior Calorific Value (kJ / mol) on a molar basis (ISO only)
- Net Heating Value (BTU/ideal cu. ft.) or Inferior Calorific Value (MJ / m^3) on a volumetric basis
- Net Heating Value (BTU/lbm) or Inferior Calorific Value (MJ / kg) on a mass basis
- Inferior Calorific Value (kJ / mol) on a molar basis (ISO only)
- Relative Gas Density (Specific Gravity)
- Gas Density (lbm / cu.ft. or kg/m^3)
- GPM (Gal. / 1000 cu.ft.)
- Compressibility
- Molecular Weight
- Vapor Pressure (psia and psig)
- Relative Liquid Density (Specific Gravity)
- Liquid Density (lbm / gal.)
- Molecular Weight
- Volume (cu.ft. / gal)
- D2598 Vapor Pressure (psia and psig)
- D2598 Relative Density
- ISO 8973 Vapor Pressure (kPa)
Total Results
- Total Raw (unnormalized) Amount
- Water Mole Fraction and Mole% (Saturated, Flowing , or As Measured)
- Gross Heating Value (BTU / cu. ft.) or Superior Calorific Value (MJ / m^3) on a volumetric basis (ideal and real)
- Gross Heating Value (BTU / lbm) or Superior Calorific Value (MJ / kg) on a mass basis
- Gross Heating Value (BTU / gal.)
- Superior Calorific Value (kJ / mol) on a molar basis (ISO only)
- Net Heating Value (BTU / cu. Ft.) or Inferior Calorific Value (MJ / m^3) on a volumetric basis (ideal and real)
- Net Heating Value (BTU / lbm) or or Inferior Calorific Value (MJ / kg) on a mass basis
- Net Heating Value (BTU / gal.)
- Inferior Calorific Value (kJ / mol) on a molar basis (ISO only)
- Relative Gas Density (ideal and real)
- Gas Density (lbm / ideal and real cu.ft. or or kg / m^3)
- Compressibility (Z) factor
- GPM
- Total Molecular Weight
- Wobbe Index
- Vapor Pressure (psia and psig)
- Liquid Density (lbm / gal. and lbm / bbl)
- Relative Liquid Density (Specific Gravity)
- Volume (cu.ft. / gal.)
- API Gravity
- D2598 Vapor Pressure (psia and psig)
- D2598 Relative Density
- ISO 8973 Vapor Pressure (kPa)
Water Content Calculations
Natural Gas Analysis calculations are initially performed on a “Dry” basis. Results are then corrected and reported for the water content of the sample. EZReporter 4.0 supports the following water content calculations:
- Saturated: Results are calculated for a water-saturated gas at the base temperature and pressure.
- Flowing: Results are calculated for a water-saturated gas at a user-specified flowing temperature and pressure. EZReporter uses the “Water Content Correlation” calculation described in the GPA 2172-09 Standard.
- As Measured: Results are calculated for a partially water-saturated gas as measured by an external water analyzer. You can enter the water amount for the “As Measured” calculation using units of either “Mole%” or “Pounds/MMCF”.
Additional Features
The Natural Gas Analysis Edition includes all of the features and capabilities of the Standard Edition, plus additional enhancements for Natural Gas Analysis.
- Physical Properties can be Easily Customized: The component list is completely customizable. Components can be added to or deleted from the component list, renamed, and calculation factors (Heating Value, Molar Mass Ratio, Summation Factor, etc.) can be updated by the user either manually or using one of the standard physical property tables included in the software.
- Standard Physical Property Tables: Standard component physical property tables are provided for the GPA 2145-03 and GPA 2145-09, and GPA 2145-16 Standards, the GPSA Engineering Data Book (12th Edition, 2004), GPA TP-17, ASTM D3588, and ISO 6976 (1995 and 2016).
- Export to Text File: You can create custom export templates to save NGA results to text files for import into flow and measurement systems like Flow-Cal and PGAS.
- Monitor Results with Alarms: You can use "Monitored Parameters" to set up alarms for critical parameters like the total un-normalized mole%.
Fidelity Plots and Reports
EZReporter can produce fidelity plots as described in the GPA 2198-16 standard. A Fidelity Plot is a plot of the Log10 of the Molecular Weight vs the Log10 of the Response Factor for a series of components. Typically plots are made of C1-nC5, N2-C1-CO2, and iC4-iC5-C6+, although there can be other valid series. The plots of these series should be linear. Significant non-linearity, outliers, or changes in slope for a particular series may indicate a problem with the calibration/reference standard or the GC method or calibration.
