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Quartz Reservoir: Geological Modelling for Reservoir Simulation

Projects Completed in 2019:

* Shuiaba Carbonates

* Tight Gas Sandstone

What is the specific purpose of the geological and/or reservoir model? Before embarking on a geological modelling study, it is important to establish the objectives with all parties. This will then be linked with the data that needs to be made available and the time that will be needed to complete the study. Methodology is adapted so that the resulting models are suitable for the purpose.

For example:

  • Volumetrics only (STOIIP, GIIP)
  • Testing a flow mechanism in a sector
  • In-field drilling and planning
  • History matching and full-field predictions

­Dynamic information and reservoir fluids must be considered when designing geological models.

­All available information should be considered, but it is important to identify the key parameters for a particular reservoir. Some of the information types are nearly always used (e.g. seismic structure), while in other types are only used in particular instances, (e.g. seismic body extraction). It is common that during a modelling study, elements come to light that suggest re-interpretation of earlier reports or analysis may be needed, so decisions may need to be made to progress the project to the satisfaction of all parties.

Naturally, good liaison and teamwork amongst the various disciplines is expected.

Previous studies should be consulted and incorporated where appropriate. However a number of ideas will need to be tested in the reservoir modelling process and it is important not to be biased at the start of a project.

It is recommended to check the original data sources and sense the reliability of the information. What one team member thinks is “data” and what is “interpretation” varies according to their viewpoint, discipline and the quality of data acquisition.

Purpose

Sources of Information

Efficient Teamwork