Question

Match the petroleum reservoir forming traps (GROUP I) with their general classifications (GROUP II). 
 

• A. P – III, Q – II, R – IV, S – I
• B. P – II, Q – III, R – IV, S – I
• C. P – III, Q – I, R – II, S – IV
• D. P – II, Q – III, R – I, S – IV

Hint:

Petroleum reservoirs can be classified into different types based on geological structures, and each trap type has a unique classification based on its formation mechanism.

Answer 1

The Correct Option is B

To match the petroleum reservoir forming traps with their respective classifications, let's analyze each trap and its definition: 1. Dome and Anticline Trap (P): This trap is typically formed by the tectonic uplift and folding of sedimentary rocks. This means that the correct classification for this trap is (II), as it represents a geological structure formed by the tectonic uplift and/or folding of sedimentary rocks. 2. Salt Dome (Q): A salt dome trap is caused by the upward intrusion of a diapiric body of halite. This means it fits with (III), which is the classification for geological structures caused by the upward intrusion of a diapiric body of halite. 3. Fault Trap (R): A fault trap is characterized by a geological plane that acts as a fluid migration barrier for reservoir rocks. This corresponds to (IV), which represents a geological plane with a sealing effect that acts as a fluid migration barrier. 4. Lenticular Trap (S): This type of trap is a geological structure with bodies of porous lithofacies embedded in impermeable lithofacies. This fits with (I), a geological structure with bodies of porous lithofacies embedded in impermeable lithofacies. Thus, the correct matching is:
- P – II: Dome and Anticline Trap
- Q – III: Salt Dome
- R – IV: Fault Trap
- S – I: Lenticular Trap
Final Answer: P – II, Q – III, R – IV, S – I