IOC and BPCL have separately indicated to the petroleum ministry their interest in taking over GAIL to help add natural gas transportation and marketing business to their kitty, official sources said. GAIL, on the other hand, feels a merger with oil and gas producer ONGC would be more appropriate.

The merger options were indicated following FM Arun Jaitley's announcement in the 2017-18 Budget speech on the government's plan to create integrated public sector oil majors that will be "able to match the performance of international and domestic private sector oil and gas companies".

ONGC is currently in the process of acquiring the government's 51.1% stake in HPCL, which at current prices is worth over Rs 33,000 crore. The proposal was approved by the Cabinet. Sources said IOC and BPCL gave separate options for the integration. The government's 55% stake in GAIL is currently worth about Rs 46,700 crore.

Integration options suggested by other companies would be taken up only after ONGC-HPCL merger is complete, they said. IOC, the largest oil refiner and fuel marketing company in the country, wanted to either acquire another refiner to add to its capacity or a gas company like GAIL.

The firm feels it already has a fledging gas business in under-construction LNG terminals, city gas distribution projects and gas marketing. GAIL, the nation's biggest gas transporter and marketing company, would complement that.

BPCL alao has natural gas ambitions and wrote to the oil ministry, saying GAIL was its number one choice for acquisition. It listed Oil India (OIL), the nation's second largest exploration firm, as its number two choice. The government holds 66.1% stake in OIL, which at current market price is worth about Rs 18,000 crore.

GAIL feels merger with ONGC makes more sense as such a move would integrate gas producer with transportation and marketing network. Sources said the government has not taken any decision on the proposals sent by other PSUs.