ONGC to start oil production from D5 block in May, gas in 2024 at lower rate

Bengaluru: Oil and Natural Gas Corporation's (ONGC) delayed Krishna Godavari basin KG-D5 project is likely to start crude oil production in May this year and gas output a year later, said a senior company official on Tuesday while interacting with the media on the sidelines of India Energy Week. ONGC was originally to start gas production from the Cluster-II fields in block KG-DWN-98/2 (KG-D5) in June 2019 and the first oil was to flow in March 2020. But these targets were shifted.

ONGC blamed contracting & supply chain issues for delay

ONGC blamed contracting and supply chains issues due to the pandemic for shifting the start of oil production first to November 2021, then to third quarter of 2022 and now to May 2023. Gas output start target was first revised to May 2021, then to May 2023 and now to May 2024.

ONGC's Director (Offshore) Pankaj Kumar said that a floating production unit, called FPSO, which will be used to produce oil, is already in Indian waters. "We estimate oil production should start in May," he said.

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Production to start at 10,000 to 12,000 barrels per day; peak of 45,000 bpd in 2-3 months: Kumar

The block is currently producing 1.7 million standard cubic metres per day (mmscmd) of natural gas. "We will start with 10,000 to 12,000 barrels per day and reach the peak of 45,000 bpd in two-to-three months," Kumar said, adding that some 2 MMSCMD of gas would also flow with oil but actual gas output will start in May 2024 when 7-8 MMSCMD production is expected. The production estimates are, however, much lower than what was originally projected. Kumar said that the company hopes to arrest the decline in crude oil production in the next fiscal while natural gas output is likely to see a rise.

ONGC's KG-DWN-98/2 or KG-D5 block, which sits next to Reliance Industries' KG-D6 block in the KG basin, has a number of discoveries that have been clubbed into clusters. It is situated offshore the Godavari River delta in the Bay of Bengal. It is located 35 kilometre off the coast of Andhra Pradesh in water depths ranging from 300-3,200 metres.

Discoveries in KG-DWN-98/2 block divided into 3 clusters

The discoveries in the block are divided into three clusters namely, Cluster-1, 2 and 3. Cluster 2 is being put to production first. Not just the delay but the production profile has also undergone a change since the investment decision was made.

The Cluster 2 field is divided into two blocks, namely 2A and 2B, which as per the original investment decision were expected to produce 23.52 million metric tonnes of oil and 50.70 billion cubic metres (bcm) of gas over the life of the field.

Cluster 2A was estimated to contain reserves of 94.26 million tonnes of crude oil and 21.75 BCM of associated gas, while Cluster 2B is estimated to host 51.98 BCM of gas reserves.
Cluster 2A was anticipated to produce 77,305 barrels of oil per day (BOPD) and associated gas at a rate of 3.81 million metric standard cubic metres per day over 15 years. Cluster 2B is expected to produce free gas of 12.75 mmscmd from eight wells and has a 16-year life.

But now the output estimate is lowered down to 45,000 bpd of oil and up to two mmscmd from Cluster 2A and 7-8 mmscmd from Cluster 2B.

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