(4 Marks) (3 Marks) 2. List the three common types of minerals in sandstone reservoir rocks. 3. Compare and contrast the seismic and Magnetic methods in terms of basic theory concept. (5 Marks) 4. Compare and contrast the difference between Folk's and Pettijohn's classification of sandstones? (5 Marks) 5. Explain the following terms: (i) Anticlinal traps (ii) Unconformity traps (iii) Permeability traps (5 Marks) 6. What is the difference between primary and secondary migrations? Illustrate the main mechanisms of secondary migration. (4 Marks) 7. Explain how you would evaluate the potential of source rock with the help of the total organic carbon content. (4 Marks)