Energean chooses FPSO for deepwater
Karish, Tanin gas fields project
Further prospects in area could extend production beyond 2060
Israel’s Petroleum Commissioner recently approved Energean’s field development plan for the deepwater Karish and Tanin fields via the Eastern Mediterranean re- gion’s first FPSO. This marks a departure
from the Tamar and Leviathan projects in the
same area, both under development through
deepwater subsea completions connected
via long-distance flowlines to fixed platforms
closer to the shore.
Offshore spoke to Energean’s Technical
Director Dr. Stephen Moore about the thinking behind the production concept, and the
company’s long-term plans to commercialize
the gas, in partnership with private equity fund
manager Kerogen Capital.
Offshore: Karish and Tanin were discov-
ered and appraised by the Noble Energy-led
group during 2011-13. Both fields are close
to Leviathan, but in deeper water depths. Did
this impact development planning in any way?
Moore: Tanin is the deepest discovery well
in Israel in 1,773 m [ 5,817 ft] of water, while
Karish is the second deepest at 1,738 m [ 5,702
ft]. The Tamar and Leviathan discovery wells
are at depths of 1,686 and 1,634 m respec-
tively [ 5,531 and 5,361 ft], and with regards
to development complexity these additional
few meters makes little to no difference. All
the discoveries offshore Israel are effectively
at the same depth except for the shallower
water fields such as Mari B, Pinnacles, Noah
and Gaza Marine.
Tanin is effectively a nor thern extension of
Leviathan lying on the other side of a saddle.
The most southerly gas in Tanin is situated
just a couple of kilometers from the northern
edge of Leviathan. Tanin sits about 20 km
[ 12. 4 mi] northwest of Tamar and Karish
roughly 25 km [ 15. 5 mi] north of Tamar: the
distance between Tanin and Karish is around
45 km [28 mi].
Offshore: Are Karish and Tanin from the
same subsurface intervals as Leviathan, and
is the gas/liquids content similar? Are there
any technical challenges in developing the
Moore: Tanin and Karish contain gas in the
same intervals as Tamar and Leviathan – the
so-called Tamar sands: layers A, B, C and D.
These are world-class turbidite sandstones
located below the Mesozoic salts and evaporates. They are normally pressured, relatively
cold and with excellent reservoir properties.
Tanin’s fluids are very similar to those
found in Tamar and Leviathan. The gas is
methane rich and relatively dry, while Kar-
ish’s fluids are somewhat richer containing
thermogenic components likely sourced from
However, development of these reservoirs
presents no significant or unique challenges.
The gas is not corrosive and contains insignificant volumes of inert substances, and the
reservoirs normally have good aquifer pressure support.
Artist’s impression of the Karish/Tanin FPSO.
(All images courtesy Energean)