From UPSC perspective, the following things are important :
Prelims level : KG basin, Natural Gas
Mains level : Oil and gas reserves in KG basin
Reliance Industries Ltd and BP (British Petroleum) have announced the start of gas production from the R cluster of the KG Basin, the deepest off-shore gas field in Asia.
- The Krishna Godavari Basin is a proven petroliferous basin of continental margin located on the east coast of India.
- Its onland part covers an area of 15000 sq. km and the offshore part covers an area of 25,000 sq. km up to 1000 m isobath.
- The basin contains about 5 km thick sediments with several cycles of deposition, ranging in age from Late Carboniferous to Pleistocene.
- The major geomorphologic units of the Krishna Godavari basin are Upland plains, Coastal plains, Recent Flood and Delta Plains.
- KG inland and offshore basins have good prospects of tight oil and tight gas reserves from the conducted field studies.
- The first gas discovery in the basin was in 1983.
- Most of the conventional wells drilled and operated have a shorter lifespan than envisaged life and with erratic production.
- This may be due to drilling of conventional wells in tight oil and gas fields without horizontal drilling in the shale rock formations and hydraulic fracturing.
Note: Tight gas and tight oil are produced from reservoir rocks with such low permeability that considerable hydraulic fracturing is required to harvest the well at economic rates.
The KGD6 block
- Krishna Godavari Dhirubhai 6 (KG-D6) was Reliance’s first offshore gas field development and its first underwater discovery.
- It was also India’s largest deposit of natural gas and the largest such discovery in the world in 2002.
- The project takes its name from India’s Krishna-Godavari Basin, which covers more than 19,000 square miles (50,000 square kilometres) in Andhra Pradesh and production block D6 in the Bay of Bengal.
Why is this important?
- The R cluster, along with the Satellite Cluster and MJ gas fields in the KG Basin is expected to produce around 30 MMSCMD (million standard cubic metres per day) of natural gas.
- This is about 15% of India’s projected demand for natural gas by 2023.
Do they impact India’s energy security efforts?
- The three projects are a key part of the plan to boost domestic production of natural gas to increase the share of natural gas in India’s energy basket from 6.2% now to 15% by 2030.
- Increased domestic production of natural gas is an important aspect of reducing India’s dependence on imports and improves energy security.