American Oil and Gas Reporter - June 2016 - 91

FIGURE 5
Lucius Project Installation Lifts

Flare
East Comprsssor
Module

North Stair Tower

Living Quarters

West Compressor
Module

Main Deck Module
West Crane
Temporary Work Deck
& Subcellar Module
West Stair Tower

oil from the Lucius platform north to the
South Marsh Island 205 shallow-water
platform, where it can be transported in the
Auger or Poseidon systems. Allseas installed the oil export line on schedule and
without incident.
The Keathley Canyon Connector export
gas line transports gas from Lucius almost
209 miles through a 20-inch line to a new,
shallow-water platform in South Timbalier 283. From there, it is transported
through a 30-inch pipeline to a processing
plant in Larose, La., which was upgraded
to scrub vapor-phase methanol from the
gas prior to entering the plant.
Because of difficulties in achieving rate
with the air compressors used for dewatering, the gas export company engineered
and successfully executed midline dewatering to reduce head pressure and allow
better rate performance when it later continued air injection at the spar. Dewatering and nitrogen packing were completed
in December 2014.
Both oil and gas export lines terminate
at a pipeline end manifold (PLEM) 1.5
miles north of Lucius. From there, Anadarko
was responsible for connecting the jumper
and subsea connector, another riser base
PLEM, the riser itself, and the TSJ that connects each riser to the soft tank on the hull.
Both risers were installed after the topsides
had been set. Both oil and gas export lines
were ready to receive hydrocarbons ahead
of the first production date.
Installation Program
The installation program was segmented in five phases. Heerema Marine
Contractors was responsible for the first

four installation phases: the mooring suction anchors; hull, mooring and
subcellar/work decks; topsides; and flowlines/risers. Technip was responsible for the
fifth phase, which involved installing the
subsea system (umbilicals, flexible flowlines, and flowline jumpers).
The offshore campaign began by successfully installing all nine suction anchors
in April 2013. The hull was wet-towed to
site and installed in September 2013,
along with the subcellar and work decks.
Flowline, subsea and related facility installation began in late 2013 and continued
through early 2014, along with various topsides integration efforts.
Meanwhile, various elements of Hadrian South's facilities were installed by an
independent vessel, and the heavy lift vessel was preparing for the arrival of the Lucius topsides in early 2014. The gas export
line was being installed simultaneously off
location by yet another independent contractor.
As many as five installation vessels
were in the area at the same time. The simultaneous operations were managed
without incident by having all involved parties supply their detailed scheduling information to one of the other installation contractors that had the best view of the overall plan, thereby managing integration into
a detailed schedule. Weekly meetings
among all involved contractors and both
Lucius and Hadrian South operators kept
the information coordinated and strengthened the simultaneous operations, despite day-to-day weather and logistical
challenges.
Installing the subsea systems was inteJUNE 2016 91



American Oil and Gas Reporter - June 2016

Table of Contents for the Digital Edition of American Oil and Gas Reporter - June 2016

Contents
American Oil and Gas Reporter - June 2016 - Cover1
American Oil and Gas Reporter - June 2016 - Cover2
American Oil and Gas Reporter - June 2016 - Contents
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