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Integrated Reservoir Modelling to Optimize the Deliverability in Mature Field November 20, 2011

Posted by ugmsc in Course and Workshop Summary.

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In the oil and gas industry, reservoir modeling involves the construction of a computer modelof a petroleum reservoir, for the purposes of improving estimation of reserves and making decisions regarding the development of the field. Values for attributes such as porosity, permeability and water saturation are associated with each cell contained in the model. The value of each attribute is implicitly deemed to apply uniformly throughout the volume of the reservoir represented by the cell.

Why Build a Model?

•     To make a realistic representation (approximation) of the subsurface.

Primary motives:

1. Volumetric estimates.

2. Reservoir simulation.

3. Well planning.

4. Field performance prediction, field development planning and individual well


Secondary motives:

1. Visualization.

2. Consistency of data.

3. Other uses (sedimentary/structural modeling, basin modeling, geomechanical.

modeling), any modeling process which needs a reliable geological description.


Hints and Tips

  • Make a clear statement why a model is being built.

1. What are its aims?

2. What will it be used for?

3. Plan your model accordingly.

  • Be aware that the aims can (and often do) change through the course of a project (Plan in an element of flexibility).
  • Models can have significantly different aims (Quick fix one day model builds or three month jobs).
  • Many ways to build a model.

1. Be aware of the different possibilities..

2. Ask colleagues/experts for advice on approaches and problem solving.

3. Model in an iterative way: start simple and built complexity, if still needed, later.


Realistic geological concepts

  • Uncertainty.
  • Sketch the model.

1. Have a firm picture of what you want to model.

2. Make a sketch.

3. Sketch the overall structure, faulting, zonation and layering.

4. Sketch the sedimentary environment for each zone.

5. QC, QC,QC



1. All affected disciplines should be involved ‘in the loop’ with the model building process (design

& literations).

2. A model is the collective responsibility of all disciplines.





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