Question

Which of the following sedimentary basins is/are producing hydrocarbon commercially?

• A. Ganga
• B. Krishna-Godavari
• C. Kerala-Konkan
• D. Cauvery

Hint:

In India, major hydrocarbon-producing basins include Assam–Arakan, Cambay, Mumbai Offshore, Krishna–Godavari, and Cauvery. Always distinguish between producing basins (like KG and Cauvery) and non-producing/exploratory basins (like Ganga and Kerala–Konkan).

Answer 1

The Correct Option is B, D

Step 1: Background.
Hydrocarbon production in India is mainly associated with sedimentary basins that have undergone suitable conditions of organic matter accumulation, burial, and maturation. Out of 26 sedimentary basins, only a few are commercially productive. Step 2: Evaluate each option.
- (A) Ganga Basin:
The Ganga Basin has thick alluvium and sediments, but no large-scale commercial hydrocarbon production has been reported. Exploration has taken place, but it is not a major producing basin. $\Rightarrow$ Incorrect.
- (B) Krishna–Godavari Basin:
The Krishna–Godavari Basin (KG Basin) is one of India’s most important hydrocarbon-producing basins, located on the eastern coast. It produces both oil and natural gas, with large offshore discoveries. $\Rightarrow$ Correct.
- (C) Kerala–Konkan Basin:
This is a passive margin basin with limited exploration and no significant commercial hydrocarbon production. $\Rightarrow$ Incorrect.
- (D) Cauvery Basin:
The Cauvery Basin (onshore and offshore Tamil Nadu) produces both oil and natural gas. ONGC and other operators have commercial production here. $\Rightarrow$ Correct.
Step 3: Final Answer.
The commercially hydrocarbon-producing sedimentary basins are: \[ \boxed{\text{(B) Krishna–Godavari and (D) Cauvery}} \]