Determination of porosity and permeability.pptx

Permeability

1. PME-322: Well Logging Lab Lec . Faria Tasnia PME Department MIST

2. Determination of porosity and permeability

3. Introduction Characterization of reservoir means the analysis of petro -physical characteristics which includes: Lithology Porosity Permeability Water saturation

4. Methodology Data Acquisition Data Interpretation Calculation Modeling

5. Porosity determination Porosity from density log Ø D = Where, Ø D = Porosity = Matrix density = Formation bulk density (Log value) = Density of the mud filtrate (use 1 for fresh water and 1.1 for salt water)  

6. Porosity determination Ø ND =( Where, Ø ND = Neutron-Density Porosity Ø N = Neutron Porosity Ø D = Density Porosity  

7. Permeability determination Permeability can be determined by most common empirical relationship, Tixier , 1949 K 1/2 = 250( Timur, 1968 K 1/2 = 100( Where, Ø= Porosity K= Permeability (md) S wi = Irreducible water saturation  

8. Depth Density (g/cc) Neutron Resistivity (ohm-m) 2400 2.48 24 13 2425 2.25 17.5 16 2450 2.265 27 20 2475 2.32 18 19 2500 2.27 22 20 2525 2.265 29 19 2550 2.27 26.5 18 2575 2.285 28 17 2600 2.3 26.5 18 2625 2.45 27 19 2650 2.3 26.5 20 2675 2.31 27 23 2700 2.31 24 21 2725 2.31 26 25 2750 2.35 25.5 24 2775 2.33 24.5 19 2800 2.37 18 19

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