Which of the following logs is not affected by the solid (matrix) composition of

Question

Which of the following logs is not affected by the solid (matrix) composition of a rock if the rock is saturated with freshwater Phetoelectic index Gamma ray log Spectral gamma ray Sell potential Which of the following rock forming minerals will record the lowest matrix density? CaMg(CO_3)_2 CaCO_3 SiO_2 FeS_2 CaSO_4 Can the presence of secondary porosity (e.g. vuggy porosity) in a limestone be diagnosed with a combination of density and neutron logs? Yes No Which of the following will have the lowest neutron porosity? OH shale Methane filled sandstone reservoir Water saturated sandstone reservoir Poorly compacted shale Coal seam What does the symbol Rxo stand tor in resistivity log measurements? Relativity of a 100% water saturated formation Resistivity of the flushed zone Resistivity of salt water formation Resistivity of freshwater formation Resistivity of formation water

Explanation / Answer

15. D

16. C. sio2

17. Yes it may because it can observe the anomaly created by the change in density of the formation.

18.b due to presence of methane gas, it underestimate the porosity value as the hydrogen index comes with low value due to less hydrogen per volume.

19. B . Flush zone

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