A MODEL TO SIMULATE HOW POROSITY CHANGES AS-Final_113933.pptx

computer modelling with matlab

1. A MODEL TO SIMULATE HOW POROSITY CHANGES AS SEDIMENTS ARE PROGRESSIVELY BURIED OVER TIME PRESENTED BY GRACE NAKYANZI 21/U/07605/PS SAMBWA TAHIR 21/U/12864/PS MURUNGI RUTH NAMAYANJA 21/U/1308 KYAKA WASSWA ETHAN 21/U/07019/PS 1

2. EQUATIONS USED 1. Density Log Equation Where is the porosity from density log is the density of formation matrix is the bulk density from the log measurement is the density of fluid in rock pores   2

3. EQUATIONS USED 2. Neutron Log Equation = HI* Where is the neutron log porosity corrected for lithology HI is the Hydrogen Index is the true formation porosity   3

4. COMBINED EQUATION Where is percent porosity is the Neutron percent porosity is the Density percent porosity   4

5. EQUATIONS USED (Z) = ATHY POROSITY-DEPTH RELATIONSHIP Where (Z) is the porosity at depth(Z) is the surface porosity K is the compaction coefficient Z is the depth   5

6. DISPLAY OF THE MODEL 6

7. MODELING NEUTRON POROSITY 7 = HI*  

8. MODELING DENSITY POROSITY 8  

9. COMBINED EQUATION 9  

10. MODELING ATHY POROSITY-DEPTH RELATIONSHIP 10 (Z) =  

11. PREPARING FOR SIMULATION 11

12. RESULTS 12