Sirius Petroleum Software

GasTank for Windows


This program uses reservoir pressure and produced volumes of gas plus liquids from individual wells and performs a P/z analysis. The result is cross-checked against a volumetric and planimetric estimate of gas in place for each well and each pool.



The program allows easy comparison of gas-in-place estimates using selected pressure data points, well groupings, and volumetric parameters. This process may indicate whether the wells are in communication, are supported by water influx, and whether the geological description and pool size is consistent with the depletion history. Applications include:

  • Validation of geological description and pool size.
  • Validation of volumetric hydrocarbon in place calculations.
  • Validation of planimetric hydrocarbon in place.
  • Material balance analysis.
  • Investigation of competitive drainage.





Current Version



Input Data

A 12-component reservoir gas analysis complete with C7+ properties, Volumetric parameters for each well, Pressure history for each well, and Planimetric parameters for each pool. .


Output Data

This program generates both graphs and report format output. Many different graphs and reports are available. Output includes :

  • Physical and pseudo-critical properties of reservoir gas analysis.
  • Volumetric and Material Balance results summarized by well, group of wells, and pool.
  • P/z plots for each well and total pool.
  • Planimetric results for each pool and the total based on the contour intervals and the enclosed contour areas.

Slide Presentation

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