Energy Resources

Petroleum, or mineral oil, is a crucial energy resource for India. However, the country's domestic production is insufficient to meet its demand, making India heavily dependent on imports. The petroleum resources in India are located in both onshore and offshore regions. The distribution of these resources is as follows:
1. Offshore Oilfields Offshore fields are the largest source of petroleum in India, contributing to a majority of the country's total production.

Mumbai High: Located in the Arabian Sea, about 176 km northwest of Mumbai, this is India's largest and most significant oilfield. It was discovered in 1974 and production started in 1976. It contributes a very large share of India's total crude oil production.

Bassein (Vasai) Field: Located south of Mumbai High, this field is rich in both oil and natural gas.

Eastern Offshore (Krishna-Godavari Basin): The basins of the Krishna and Godavari rivers on the east coast have emerged as significant areas for both oil and natural gas reserves. The Ravva offshore field is a notable producer in this region.

2. Onshore Oilfields Onshore production comes from several states, with Assam, Gujarat, and Rajasthan being the most important.

Assam (Brahmaputra Valley): This is the oldest oil-producing region in India. The major fields are:

Digboi: The oldest oilfield in India, where oil was first discovered in 1867.
Naharkatiya and Moran-Hugrijan: These are other significant oilfields in the state. Oil from these fields is sent to refineries at Nunmati (Guwahati) and Barauni.

Gujarat Plains: This is the second-largest onshore producing region in India. The important fields include:

Ankleshwar: One of the most important fields in Gujarat.
Kalol, Mehsana, Navagam, and Kosamba are other major oil-producing areas.

Rajasthan: Rajasthan has emerged as a major onshore producer in recent years. The Mangala oil field in the Barmer district is the largest onshore oil discovery in India in over two decades. Other important fields in the region include Bhagyam and Aishwarya.

The exploration and production of petroleum in India are primarily managed by two public sector companies: the Oil and Natural Gas Corporation (ONGC) and Oil India Limited (OIL), along with several private and joint-venture companies. Despite these resources, India's domestic production meets only a fraction of its consumption needs.

Step 1: Understanding the Concept:
The question asks to identify the primary resource extracted from "Bombay High" (now known as Mumbai High). This requires knowledge of major mineral and energy resource locations in India.
Step 2: Detailed Explanation:
Let's analyze the options in the context of Bombay High:


Bombay High (Mumbai High) is a large offshore oilfield located in the Arabian Sea, about 176 kilometers off the coast of Mumbai.

It is India's largest and most significant oil and gas production field, operated by the Oil and Natural Gas Corporation (ONGC).

It is famous for the extraction of crude petroleum, which is a type of mineral oil, and natural gas.

The other options are terrestrial minerals found elsewhere in India: Copper is mined mainly in Rajasthan and Madhya Pradesh, Iron-ore in Odisha and Jharkhand, and Bauxite in Odisha and Gujarat.

Thus, Bombay High is specifically associated with the mining (drilling) of mineral oil.
Step 3: Final Answer:
"Bombay High" is famous for the mining of Mineral oil.

Step 1: Location of Bombay High.
Bombay High is an offshore oil field located about 160 km off the coast of Mumbai in the Arabian Sea. It is managed by the Oil and Natural Gas Corporation (ONGC).

Step 2: Resource extracted.
The main resource extracted from Bombay High is mineral oil (crude petroleum). It is India's largest offshore oil-producing field and plays a crucial role in meeting the country's energy demands.

Step 3: Elimination of other options.
- Copper → Found in Rajasthan, Madhya Pradesh, Jharkhand, but not Bombay High.
- Bauxite → Found in Odisha, Jharkhand, Chhattisgarh.
- Iron ore → Major deposits in Odisha, Jharkhand, Chhattisgarh, Karnataka, not Bombay High.

Overview: Petroleum in India occurs in onshore sedimentary basins and offshore shelves; production is dominated by western offshore (Mumbai High and adjoining fields), followed by onshore fields in Assam, Gujarat and Rajasthan, with newer output from eastern offshore basins.
Major producing regions (fields/basins):
1.\; Western Offshore (Arabian Sea): Mumbai High–Heera–Neelam–Bassein region off Maharashtra and Gujarat; the single largest contributor to national crude.
2.\; Assam–Arakan Basin (Northeast): Digboi, Naharkatiya, Moran, Lakwa and other fields in Upper Assam; India's earliest oil province.
3.\; Cambay Basin (Gujarat): Ankleshwar, Kalol, Mehsana etc.; significant onshore crude and associated gas.
4.\; Rajasthan (Barmer–Sanchore Basin): Mangala, Bhagyam and Aishwarya fields around Barmer; major onshore addition since late 2000s.
5.\; Eastern Offshore: Krishna–Godavari and Cauvery offshore producing oil and, more prominently, natural gas/condensate.
Distribution network (refining and pipelines):
- Refineries (selected, west–to–east): Jamnagar complex (Gujarat), Vadodara/Koyali and Himmatnagar region (Gujarat), Mumbai and Navi Mumbai (Maharashtra), Mangalore (Karnataka), Kochi (Kerala), Chennai/Manali and Nagapattinam (Tamil Nadu), Visakhapatnam and Paradip (Andhra–Odisha coast), Haldia (West Bengal), Barauni (Bihar), Mathura and Panipat (U.P.–Haryana), Bongaigaon, Guwahati, Digboi and Numaligarh (Assam).
- Crude/product pipelines (illustrative): Naharkatiya–Barauni line moving Assam crude; offshore–Uran lines bringing Mumbai High crude to the mainland; Salaya–Mathura–Panipat network carrying west-coast crude inland; Mundra–Panipat and Paradip–Haldia–Barauni/Numaligarh product corridors; regional product lines feed depots and aviation fuel nodes.
- Ports & coastal movement: Kandla, Sikka/Jamnagar, Mumbai/JNPT, Mangalore, Kochi, Chennai, Ennore, Visakhapatnam and Paradip handle import of crude and coastal shipment of products to balance regional demand.
Spatial pattern and reasons:
- Offshore dominance reflects thick sedimentary sequences on the continental shelf and successful platform development.
- Assam and Gujarat host older Tertiary sediments and long-explored structures; Rajasthan's Thar desert traps have stratigraphic/structural highs discovered by modern seismic.
- Refineries tend to cluster near crude landfalls/ports or large consumption centres to minimize logistics costs.
Significance & issues:
- Petroleum fuels transport, petrochemicals and industry; refineries anchor coastal industrial belts.
- Challenges include mature field decline, high import dependence, E&P risks, environmental safeguards offshore/onshore and the need for enhanced recovery and diversification to cleaner fuels.

Coal
Petroleum (crude oil)
What "conventional energy" means
Conventional energy refers to established, large–scale, commercial sources that have powered industry and households since the industrial revolution—primarily fossil fuels (coal, petroleum, natural gas) and often large hydropower. They are typically central-station, fuel-based systems with well-developed mining, refining and transport chains.
Why coal is conventional
Coal is a combustible sedimentary rock rich in carbon. It is mined (opencast/underground), sized, and burnt in boilers to produce high-pressure steam that drives turbines and generators. Besides electricity, coal is used in metallurgy (coke for blast furnaces), cement, brick kilns and as a reductant/heat source in many industries. India has abundant reserves in the Gondwana basins (Jharkhand, Odisha, Chhattisgarh, West Bengal, Madhya Pradesh). Key characteristics: high energy density, ease of storage/transport, and compatibility with base-load generation—but high CO , SO , NO , fly ash and particulate emissions, plus land and water impacts from mining and ash disposal.
Why petroleum is conventional
Petroleum (crude oil) is a complex mixture of hydrocarbons extracted from wells and transported by pipelines/tankers to refineries. Fractional distillation and cracking yield LPG, petrol, diesel, kerosene/ATF, furnace oil and petrochemical feedstocks. It dominates transport (internal combustion engines) because of very high energy density and ease of handling. Drawbacks include import dependence for many countries, price volatility, greenhouse gas emissions and local pollutants (e.g., PM, SO from high-sulphur fuels).
Other conventional sources often cited
Natural gas (power, cooking, fertiliser feedstock) and large hydroelectricity (dams with sizable storage, firm capacity) are commonly grouped with conventional energy in school geography/economics texts.
Conventional vs non-conventional (contrast for answers)
Conventional: depletable fuels, centralised generation, mature technology, large environmental footprints, historically cheap per unit when externalities are excluded.
Non-conventional/renewable: solar, wind, small hydro, biomass, geothermal, tidal—diffuse resources, variable/seasonal outputs (except biomass/geothermal), but low operational emissions and improving costs.

Step 1: Understanding India's Nuclear Power Journey.
India's first atomic power station, the Tarapore Atomic Power Station (TAPS), was established in 1969 and is located in Tarapur, Maharashtra. It was the first nuclear power station to be commissioned in India.

Step 2: Explanation of other options. - Narora, Kalpakkam, and Rana Pratap Sagar are significant nuclear sites, but they were established after the commissioning of the Tarapore power station.

Step 3: Conclusion. Thus, Tarapore is the correct answer as the location of India's first atomic power station.

Step 1: Identify the major oil-producing regions of India.
The earliest and still one of the most significant oil-producing states in India is Assam. The first oil well of India was discovered in Digboi, Assam in 1889. Since then, several other oil fields have been developed in Assam.

Step 2: Major oil fields in Assam.
- Digboi, Naharkatiya, Moran, Rudrasagar, and Sibsagar are some of the most important oil fields.
- Assam accounts for a large share of India's crude oil production.

Step 3: Analyze the other options.
- (B) Rajasthan: Barmer oil fields are important but relatively new.
- (C) Bihar: No significant oil fields.
- (D) Tamil Nadu: Some offshore production (Cauvery basin) exists, but not as significant as Assam.

Step 4: Conclusion.
The state with the major oil fields historically and currently is Assam.