may not have been a year for elephant discoveries, but in 2004 a
number of important wildcats added to the world's reserve inventory
a list of some of those significant finds along with the commentary
as reported by the IHS Global E&P Reporting Service, whose editors
cover E&P activity in more than 200 countries.
complete listing is available on the EXPLORER Web site at www.aapg.org.
Algeria -- First Calgary's Ledjmet South 1 wildcat weighed in with a 13,515
bod and 30.9 mmcfgd winner in the onshore Berkine Basin. Sontract
hit big with its find in the Hassi Messaoud Basin, there testing
4,445 bod with 4.3 mmcfgd, and with the BKP2 in the Oued Mya Basin,
at 3,072 bod and 21 mmcfgd.
Angola -- Four deepwater discoveries in the Congo Fan included Total's
Canela 1, testing 6,800 barrels of oil a day, and ChevronTexaco's
KX2 flowing at 5,000 bod.
Twenty-seven discoveries were reported, including Suco's 3,000 bod
find in the Gulf of Suez, Sipetrol's 3,250 bod wildcat and Shell's
Shieba 18-3 testing at 1,600 bod with gas -- both in the onshore
Abu Gharadig Basin.
Offshore Gabon -- Vaalco's Avouma
1 on the shelf of the Lower Congo Basin flowed 6,600 bod.
Nigeria -- Total's Preowei 1B in the deepwater Niger Delta area is potentially
significant, as Total has already indicated a desire to develop
the find even though the first appraisal well has yet to be drilled.
Mauritaniaý -- The offshore again has hosted a number of exploratory wells,
and Dana's Pelican 1 is arguably the best. The operator confirmed
in-place reserves of 1.03 tcf, with technically recoverable reserves
in the range 600-800 bcf together with 10-13 mmb of associated liquids.
However, as the base of the hydrocarbon-bearing interval was not
encountered, these figures could be revised upwards.
Tunisia -- ENI tested two discoveries in the Ghadames Basin, one testing
6,200 bod with 14.3 mmcfgd, and the other at 3,600 bod.
Australia -- ChevronTexaco's Wheatstone 1 exploration well in the North Carnarvon
Basin is viewed as a multi tcf gas find that is likely to be tied
into Gorgon, or maybe even the Northwest Shelf. The well encountered
53.34m of net gas sands in the objective Jurassic Tithonian and
Triassic Mungaroo sands, in which a production test flowed 54 mmcfd
of note is that BHP-Billiton made a number of oil discoveries (Eskdale,
Harrison and Stickle) that have opened a medium-sized oil province
in the offshore Carnarvon Basin.
New Zealand -- The Amokura 1 and Pateke 2 discoveries, drilled by NZOP, were
found to be on the same field. They represent the first oil discovery
in New Zealand in a number of years.
-- At a country level, Les Mimosa 1GD is considered as outstanding
as it is one of several prospects to have been identified -- and
also that most of the Lege permit, in which it lies, is now open
Basin discovery by ExxonMobil flowed 1,600 bod.
-- PGNG's Zaniemysl 3 in the Fore-Sudetic Monocline flowed 2.5 mmcfgd,
and Cierpisz2 in the Outer Carpathian Foredeep tested at 26.9 mmcfgd.
FAR EAST TOP
Bangladesh -- Bangora 1 operated by Tullow is a potentially huge, significant
discovery that encountered a number of gas-bearing intervals between
2,580-3,285 meters. Three lower most intervals were tested flowing
a combined 120 mmcfgd, with the shallower units to be tested at
a later date.
has now tested gas at either end of a 400-kilometer long anticlinal
trend, and an accelerated appraisal program is planned.
Although no reserves have been assigned, Laopunan 1 has been proclaimed
by PetroChina as its largest and most significant discovery in 2004,
testing at 4,400 bod and 5.6 mmcfgd. It is located in around three
meters of water and was drilled on the Nanpu 2 structure in the
southern part of the Nanpu Sag, Bohai Gulf Basin.
also struck with five discoveries in the Tarim Basin, including
the Yugi 4, testing at 944 bod and 1.8 mmcfgd, and the Lungu 39,
flowing at 355 bod and 41.3 mmcfgd.
For the second year, India's offshore has been a key exploration
area. In 2004 it is the Reliance wells on the Dhirubhai structure
in the NEC-OSN-97/2 block that are regarded as most significant
as these have shown the shallow water area of the Mahanadi Basin
to hold significant amounts of gas. Reliance reported a total of
seven discoveries in three offshore basins.
Indonesia -- The Jeruk 1, a big oil discovery made by Santos with likely minimum
reserves 170 mmboe contained in the Kujung Formation in the offshore
East Java Basin, has been successfully appraised. Eni completed
Aster-1 as an important new field discovery. Although untested,
this well opens the potential for a new deepwater play in the Tarakan
Basin and has high-graded an area where the median line is disputed.
Vietnam -- The 09-R 23X well is understood to have flowed about 1,100 bod
of 35-degree API crude and is claimed by the operator to be first
basement oil discovery in the southern part of Block 09 in the offshore
Cuu Long offshore basin.
LATIN AMERICA TOP
Colombia -- Perenco's Jordon Este 1 flowed 1,877 bod in the Llanos-Barinas
Although considered non-commercial, Repsol YPF's Yamagua 1 is an
important well in that it is the first to be drilled in Cuba's deep
water, and also because light oil was found. The structure is subject
to further seismic evaluation, and at least two more wells are being
Mexico -- Among the 21 discoveries reported by Pemex, seven were offshore,
including the Itla 1 in the Gulf Coast Basin, testing at 1,350 bod
with gas, and the Kosni 1 in the Tampico-Misantla Basin, flowing
Venezuela -- Oil-in-place for the Travi Este structure, successfully drilled
by the Travi Este 2X wildcat, was estimated by PDVSA at the time
of logging at 670 mmbo and 2.6 tcf of gas from a 220-meter net pay
section in the Naricual and San Juan formations; this ranks among
the country's most important wells in 2004.
Loran 2X in the Plataforma Deltana is believed to have found reserves
of 4-6 tcf and is being touted as the catalyst to launch the country's
MIDDLE EAST TOP
Six discoveries were reported, including Repsol's find in the Murzug
Basin testing 1,350 bod.
Saudi Arabia -- Shaybah 700 is significant, as it established a new non-associated
gas/condensate play and work continues to evaluate a deeper gas
objective. It has the potential to be a very large find with reserves
estimated at 3 tcf of gas and 100 mmb condensate.
Kuwait -- Mutriba 12 was reported to have discovered sweet gas and 50-degree
API condensate in the Lower Triassic Sudair Formation; a second
test suffered a technical failure. The well was drilled to a total
depth of 6,736 meters and is considered the first non-associated
gas producer in Kuwait.
found 4,850 bod in the Dibdibah Sub-Basin with the Bahrah 28.
NORTH AMERICA TOP
Mexico -- Although no reserves have been published, the Jack (ChevronTexaco)
and St. Malo (Unocal) discoveries are considered significant as
they both are located in the newly established Paleogene trend.