Muruk confirmed as Hides lookalike in PNG
The Oil Search Ltd.-operated Muruk-1/ST3 sidetrack appraisal
well in the highlands of Papua New Guinea has confirmed a
natural gas-rich zone found in the initial Muruk-1 discovery in
permit PPL 402 last December.
The sidetrack, drilled just southwest of the discovery well,
encountered gas saturation through the entire Toro sandstone
reservoir section with no gas-water contact observed.
Oil Search said the Cretaceous reservoir has the same high
quality as that of giant producing Hides gas field that lies 21 km
to the southeast (see map, OGJ Online, Nov. 17, 2016).
Muruk-1/ST3 was drilled to a total depth of 4,130 m. The
Toro was penetrated at 3,968 m.
Two cores were cut and a full suite of logging and pressure
data tools was run. The information is now being evaluated
ahead of a likely production test.
Oil Search added that there is little doubt the well has found
a potentially substantial gas field. Its close proximity to Hides
means it could be a welcome contributor in support of a proposed third train in the Papua New Guinea LNG project.
News of the successful appraisal came after the first sidetrack Muruk-1/ST2, drilled last month northeast of the discovery well, found the Toro reservoir to be tightly folded and contorted containing water only.
The sidetracks were drilled in an attempt to find the gas-water contact. So far the gas column appears to be 350 m thick.
Predrill estimates suggested the structure has potential to hold
1-3 tcf of gas.
Further appraisal of the Muruk discovery is being considered for 2018.
Three other prospects in the northwest highlands are on
trend with Muruk and these may also be included in future
drilling programs depending on the results of the current drilling and additional seismic work.
Oil Search is operator with 37.5%. Other participants are
ExxonMobil Corp. with 42.5% and Santos Ltd. with 20%.
Beach targets undeveloped Cooper basin oil reserves
A group led by Beach Energy Ltd. and including Cooper Energy
Ltd., both of Adelaide, has started a five-well drilling campaign
in South Australian production permit PPL 220, which contains Callawonga oil field on the Cooper basin’s western flank.
The program is specifically targeting previously undeveloped reserves in the McKinlay Member sandstone that lies
immediately above the Namur Sandstone, which is the main
producing reservoir at the field.
Beach says that so far no oil-water contact has been encountered within the McKinlay reservoir. The drilling campaign will
include both development and appraisal well locations with the
potential to extend the known boundaries of Callawonga field.
The new wells will be numbered Callawonga 14-18, al-
though the drilling sequence will be determined by the results
of each individual well. Callawonga- 14, spudded during the
weekend, is at 198 m and is expected to take 6 days to reach its
planned 1,410-m total depth.
The five-well program is scheduled for completion by mid-
July and the combine is planning to connect the wells to the
field production system during August-September.
Two Callawonga producers, Nos. 7 and 12, are already tap-
ping parts of the McKinlay Member at a combined rate of 500
b/d of oil.
Operator Beach has 75% of the field. Cooper Energy holds
the remaining interest.
Tullow finds net oil pay with Emekuya-1 well in Kenya
Tullow Oil PLC’s Emekuya-1 well, drilled on Block 13T of
northern Kenya, has found 75 m of net oil pay in two zones.
Emekuya-1 was drilled 2½ km north of the Etom- 2 well and
had the objective of drilling a fault block on the flank of the
Greater Etom structure. The well was drilled by PR Marriott
Drilling Ltd.’s Rig 46 to a total measured depth of 1,356 m and
penetrated reservoir quality Miocene sandstone that correlate
to those seen in the Etom- 2 well (OGJ Online, Dec. 15, 2015).
Downhole pressure measurements and fluid samples suggest the main oil reservoir is on the same static pressure gradient as the Etom- 2 well, which demonstrates that a major part
of the Greater Etom structure is oil-filled. Tullow says the encountered reservoir sands also appear to be extensive, further
derisking the northern play area and boding well for future exploration in the region.
“The Emekuya-1 exploratory appraisal well has made an im-
portant discovery in the northern part of the South Lokichar
basin,” explained Angus McCoss, Tullow exploration direc-
tor. “This well has proven oil charge across a significant part
of the Greater Etom structure and we are very encouraged by
the quality and particularly the regional extent of the reservoir.
We now look forward to the remainder of the Kenya explora-
tion and appraisal campaign in support of the ongoing work to
prepare this important asset for full-field development.”
The rig will be moved to drill an updip appraisal well on the
Greater Etom structure. Tullow operates Blocks 13T and 10BB
with 50% interest. Partners are Africa Oil Corp. and Maersk Oil
each with 25% interest.
DRILLING & PRODUCTION QUICK TAKES
BP begins gas production from West Nile Delta
BP PLC has started gas production from Taurus and Libra fields, the
first two of five fields in the West Nile Delta development of Egypt.
The fields are currently producing more than 700 MMscfd of
sales gas and 1,000 b/d of condensate. Following final approval
in 2015, development of Taurus and Libra was fast-tracked by
8 months to enable delivery of an annual average of more than
600 MMscfd to Egypt’s national gas grid, which first received
gas from the project Mar. 24.
The Taurus and Libra project is a subsea greenfield develop-