The decision ahead of Japanese Prime Minister Shinzo Abe's visit beginning on Friday gives Tokyo an early lead over China.
The government wants to introduce a nationwide goods and services tax to revive its stalled reform programme.
The fields have reserves of about 89 million tonnes
Modi's reform agenda suffered a major setback earlier this month when lawmakers in the Rajya Sabha refused to support the the Goods and Service Tax bill.
This is another blow to Modi's ambitious economic reform agenda that has been stalled by a logjam in parliament
Finance Minister Arun Jaitley sought parliament's approval on Friday to increase the spending budget for this fiscal year by $4 billion, with almost half to be used to inject extra capital into state banks struggling with bad loans.
India will issue a new decree this week for land purchases that has stirred disquiet across the country
Modi to dilute pro-business changes to land bill.
Restrictions on buying land are among barriers holding up projects worth almost $300 billion
Modi orders coal, insurance sector reforms.
The landmark bill to liberalise the insurance industry, which marks Prime Minister Narendra Modi's first stab at legislative reforms, will now go to a parliamentary committee, which will submit a report later this year.
Railway Budget will be presented on July 8.
It is normal practice for Indian governments to go to parliament for spending not included in the annual budget.
The government plans to conduct the next airwave auction in March.
Prime Minister Manmohan Singh's government is in a race against the clock to pass reforms economists say are needed to breathe life into Asia's third-largest economy.