Density Quiz1. High uranium is often associated with which rock type a. Feldsparb. Source rockc. Micad. Zircon2. Typical applications of the Gamma Ray tool include measuring the following: a. Hole diameterb. Clay typec. Pressured. porosity

3. The highest GR energy comes from radioactive decay of which element a. Thoriumb. Uraniumc. potassium4. Typical depth of investigation of a GR tool isa. 8b. 12c. 205. The NGT (Natural Gamma ray Tool) can help to identify the following mineralsa. Anhydriteb. Coalc. Feldspard. Mica

6. What is the difference between the GR and NGR?....7. Mention at least three the typical application of the gamma ray.a. .b. ..c. ..

Density Quit1. Which gamma ray interactions are used by the density tool?a. Pair productionb. Compton scatteringc. Photo electric absorption2. A porous sandstone reads a density of 2.6 gm/cc. What is the likely porosity?a. 3%b. 15%c. 10%3. Which two of the following have the highest density, assuming porosity is zero?a. Sandstoneb. Calcitec. Dolomited. anhydrite4. How frequent should the tool be calibrated?a. Every 6 monthsb. Once per every surveyc. Every 3 monthd. Whenever it needed

5. Compton scattering is defined as:a. Low energyb. Medium energyc. High energy6. The density tool can provide information about:a. Permeable formationb. Natural GRc. Lithologyd. Formation Temperature

7. The measured tool density is derived from:a. The density electronsb. The density of neutronc. The pair of productiond. The volume of hydrogen

8. What's the typical depth of investigation for the density tool?a. 3-5''b. 6-9''c. 10-14''9. A density log reads 2.78 gm/cc. Which formation is most likely present?a. Anhydriteb. Dolomitec. Sandstoned. Limestone10. Lithology information comes from:a. low energy GRsb. Compton Scatteringc. Density correction curved. Photelectric absorbtion11. If you have a limestone reservoir filled with oil, and your density reads 2.25, what is the likely total porosity?a. 25%b. 15%c. 20%

12. List out the typical uses of PEF and calliper as an auxiliary tool.a. b. ..c.

Neutron Quiz

1. When the neutron porosity is derivered from a count rate ration,it may need correction for:1. Environmental correction eg formation temperature2. Bore well correction (stand off)

2. An advantage of a minitron neutron source generator compaired to a chemical source is :1. Is not reliable2. Gives a lower count rate3. Can be used to make epithermal measurement

3. Which of the following has the highest hydrogen index1. Water2. Shale3. Coal4. Limestone

4. In casing well, an environmentally corrected neutron a. Can never give reliable datab. Only works if a minitron is used c. Can provide a good measurement

5. An environmentally corrected neutron log reads 30% porosity (in limestone units in a clean bearing chalk formation .The true porosity isa. 26%b. 30%c. 35%

6. An environmentally corrected neutron log reads 30% porosity (in limestone units in a clean water bearing sandstone formation .The true porosity isa. 18%b. 20%c. 25%

7. In gas zone, which statement is usually truea. Neutron porosity > density porosityb. Neutron porosity = density porosityc. Neutron porosity < density porosity

8. A limestone compatible scale between density and neutron logs alignsa. 0% porosity with 2.7 gm /ccb. 0% porosity with 2.65 gm/ccc. 0 % porosity with 2.6 gm7cc9. Clays often show a high neutron porosity because their chemical formula containsa. Siliconb. Ironc. Hydrogen10. Mention the neutron Source used in neutron logging tool.a. .b.

Chart to usea.

b