Understanding Shale Gas Resources in India

The question asks about the regions in India where shale gas resources are found. Shale gas is a natural gas found trapped within shale formations. Extracting it requires specialized techniques like hydraulic fracturing.

Identifying potential shale gas reserves is crucial for a country's energy security. India has explored various sedimentary basins for the presence of such resources.

Analysis of Potential Shale Gas Basins

Let's examine each of the basins mentioned in the question:

• 1. Cambay Basin: Located in Gujarat, the Cambay Basin is one of India's most prolific oil and gas producing basins. Studies and exploration efforts have indicated the presence of significant shale gas resources within this basin.
• 2. Cauvery Basin: Situated on the east coast of India, covering parts of Tamil Nadu and Puducherry, the Cauvery Basin is another known hydrocarbon-rich area. This basin has also been identified as having potential for shale gas reserves based on geological studies and exploration activities.
• 3. Krishna-Godavari Basin: Located on the east coast, primarily in Andhra Pradesh, the Krishna-Godavari (KG) Basin is a major site for hydrocarbon discoveries, including significant offshore gas fields. Like the other two basins, the KG Basin is also considered to possess substantial shale gas resources.

Conclusion on Shale Gas Locations

Based on geological assessments and exploration conducted by various agencies, including the Directorate General of Hydrocarbons (DGH) and Oil and Natural Gas Corporation (ONGC), all three basins listed—Cambay, Cauvery, and Krishna-Godavari—are known to contain potential shale gas resources. Therefore, the correct answer includes all three regions.

Evaluating the options based on our analysis:

• Option 1: 1 and 2 only (Cambay Basin and Cauvery Basin) - Incorrect, as the Krishna-Godavari Basin also has resources.
• Option 2: 3 only (Krishna-Godavari Basin) - Incorrect, as Cambay and Cauvery Basins also have resources.
• Option 3: 2 and 3 only (Cauvery Basin and Krishna-Godavari Basin) - Incorrect, as the Cambay Basin also has resources.
• Option 4: 1, 2 and 3 (Cambay Basin, Cauvery Basin, and Krishna-Godavari Basin) - Correct, as all three basins are identified as having shale gas potential.

Thus, shale gas resources are found in the Cambay Basin, Cauvery Basin, and Krishna-Godavari Basin.

Revision Table: Shale Gas Basins in India

Additional Information on Shale Gas in India

Shale gas exploration in India is still in relatively early stages compared to countries like the United States. The potential of these basins is being assessed through detailed geological studies, seismic surveys, and pilot drilling projects.

Key aspects related to shale gas:

• Extraction Method: Primarily involves hydraulic fracturing (fracking) and horizontal drilling.
• Challenges: Environmental concerns (water usage, wastewater disposal, potential seismic activity), technological requirements, and economic viability depending on global energy prices.
• Government Policy: The Indian government has formulated policies to encourage exploration and production of unconventional hydrocarbons like shale gas to boost domestic energy production.
• Estimated Reserves: Various estimates exist, but the actual economically recoverable reserves depend heavily on technology and extraction costs.

Understanding these aspects helps in appreciating the significance and challenges associated with exploring and exploiting shale gas resources in India's major sedimentary basins.