Plans for deep-water exploration have raised hopes of an eventual major natural gas discovery, while onshore oil development is progressing slowly
In a modest, modern building tucked away in a leafy residential street close to the centre of Athens a major energy transition is being managed. The building is home to Hellenic Hydrocarbons Resources Management (HHRM). Since 2011, this state-owned company has been revitalising what had become a near-moribund energy sector.
HHRM has just pulled off a considerable coup, hooking super-major ExxonMobil into Greece’s upstream, in partnership with Total, which already had a presence there. The latest move, many believe, will eventually see Greece emerge as a significant player on the East Mediterranean energy stage. Greek deputy energy minister Michalis Verroiopoulos told Petroleum Economist that “these days we’re focussing on promoting hydrocarbons exploration in Greece—there’s a new dynamism to it.”
The Zohr effect
So, what has attracted these energy super-giants to a country which hadn’t been associated with the East Med offshore gas boom or upstream activity in general? “The big change came with the discoveries elsewhere in the region, in Israel and Cyprus, but more particularly with Zohr off Egypt,” Bassias said. The Zohr field, discovered by Eni in 2015, has at least 30 trillion cubic feet (850 trillion cubic metres) of gas in place—found in a previously unknown carbonate layer. “Eni has transformed completely the image of the Eastern Mediterranean. What’s exciting is that we have the same geological environment as Zohr in several areas of the East Med, not just off Cyprus, but off Greece too. So, there’s a good chance of having similar discoveries.”
In early July, the Greek government awarded a contract to an Exxon-Total-Hellenic Petroleum consortium to explore for hydrocarbons in the West of Crete and South West of Crete blocks. Repsol and Hellenic have expressed interest in a third block in the Ionian Sea to the west (known as the Ionian Block) which has similar characteristics to those off Crete.
Very deep water
While the outlook may be exciting, Bassias is quick to add that Greeks will have to wait some time to see whether reality matches expectation in terms of natural gas in place. The day when gas might come ashore is even further away. The two licences off Crete together cover huge area (a total of 40,000 sq km/15,000 sq miles) and the water is very deep. “I want to stress,” Bassias said, “that what we have here are two very big blocks where the average water depth is 3,200 metres (10,500 ft), deeper than off Brazil and the Gulf of Mexico. So, you may have some 4,000 metres of depth with interesting plays within the seabed. We have identified more than 10 structures that could be interesting.”
The problem with drilling in ultra-deep waters like those off Crete isn’t penetrating the rock, but rather remaining stable. “The technology for this isn’t sufficiently advanced yet,” the HHRM boss continued. “We don’t have the drilling ships to do that. It’s not just a question of refurbishing a drilling ship to enable it to drill in waters deeper than 3,000 metres.”
Exxon and Total, Bassias said, are working flat out to overcome the technology issues. In the meantime, one can expect three years of seismic gathering in the offshore-Crete blocks, with more 3D seismic and other studies in the second phase-which will last a further two-to-three years. “So from now, we’re five or six years away from the point when we’re ready to start drilling. But by 2025 the technology that we need will be ready to allow drilling in these kinds of settings. So people need to understand that we’re not going to be producing oil or gas this year or next. We’re talking about six or seven years from now.”
Prinos soldiers on
While the Zohr effect might well put Greece on the energy map in a dramatic way by the mid-2020s, the country hopes that there will be other reasons to be cheerful before then. At present, Greece has only one block producing hydrocarbons, Prinos, in the Gulf of Kavala off the island of Thassos in the far north-east. Prinos was discovered in 1974 and at one point produced 30,000 barrels a day. But it then went into decline. With the licence running out, it seemed doomed to be abandoned. Then in 2007, private Greek firm Energean, which in March listed on the London Stock Exchange, acquired Prinos and set about redeveloping it. Today, production averages around 4,200 b/d and Energean hopes to gradually double this figure. “Prinos is an old field,” Energean’s chief executive Mathios Rigas told Petroleum Economist. The field’s reserves stand at “58m barrels of oil and contingent resources—40m is the 2P number. So there’s a lot more oil to be produced from Prinos”.The beauty of Prinos is that, without any extra cost, it has facilities to handle up to 30,000 b/d”—the level the field once produced.
Another Energean block, Katakolon, situated offshore in the Western Peloponnese, is likely to be Greece’s next producing asset. The government issued a 25-year exploitation licence for the West Katakolon field—a small field with 10.5m barrels of 2P reserves. Drilling is planned for 2019 using extended-reach technology to drill from onshore to offshore reservoirs.
For many years very little appeared to be moving in Greece’s energy sector. Between 1975 and 2007, Hellenic Petroleum had exclusive rights for exploration and production in 26 blocks, and it audited and oversaw the Prinos operations. In 2011, the political masters at the time decided it was time for Greece to get involved again in energy activities. It contracted PGS to carry out seismic work in the western part of Greece, the Ionian Sea and around Crete. It also set up HRRM.
Second bid round?
In 2014, the country’s second bid round was launched (the first one was in the 1990s) with around 20 blocks on offer. In the end, only three blocks were awarded, two to Hellenic and one (Block 2) to a joint venture between Total, Edison and Hellenic. The bid round happened at a very bad time because oil prices were going down. Nobody was interested because at that time Greece was a frontier area and you don’t invest in frontier areas when oil prices are low.
Energean acquired the onshore Ioannina block in northern Epirus in 2014 and three years later farmed out 60% of the licence to Repsol, which became operator. The collection of 2D seismic is continuing, in advance of the start of exploration drilling. In 2017, Repsol also acquired 60% of Energean’s onshore Aitoloakarnania block in western Greece where a 2D survey is being carried out in 2018-19.
Source: Petroleum Economist