Crucial Formation Evaluation Questions

What are the Total and Effective Porosities in a Complex Lithology Environment ?
What Fluid Types are Present in the Reservoir and Where?
What is the permeability?
Will the formation produce water free? (BVI / FFI)

MRIL answers them all
Characteristic of MRIL response
Only sensitive to H-atoms in fluids and gas Blind to:
1. rock matrix 2. dry clay 3. CO2 4. N2


MRI Medical Oilfield
Only fluids are visible

Medical… X-ray solids (bones)

Oilfield.. Density solids (rock)
What the Customer wants to know…

Volume will flow hydrocarbons

porosity permeability fluid typing

Lithology Independent Porosity

1. For Sonic, Neutron, & Density tools to determine porosity, rock matrix MUST be known!
2. Porosity equations assumes one matrix is present.
3. If more than one mineral is present, then the volume of each must be accounted for before porosity can be determined.
4. You say, this is not a problem in your well.
~ Do you have Sand, Shale, Calcite cementation material present?
5. You have a problem!








Triple-Combo


What is Lithology?


What is Porosity?












ULTRA

What is the Porosity?


MRIL in Wellbore


MRIL-Prime Shells

The Resonance Effect

MRI Measurement

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