Cal
Dive successfully intervenes on deepwater ENI wells
Posted: 25 March 2004
Well Ops Inc., a subsidiary of Cal Dive International, Inc has
successfully completed a two well subsea intervention contract for
ENI in the Gulf of Mexico.
The wells, Yosemite and King Kong, are located in Green Canyon
blocks 516 and 472, respectively. Water depth at both wells is approximately
3,815 feet.
The DP MSV Q4000 was mobilized with all necessary oilfield services
onboard including slickline, coil tubing, pumping and well flow
back capability. Well access, pressure control and emergency disconnect
capability were achieved utilizing Well Ops' 7-3/8" through-bore
Intervention Riser System.
The system was deployed subsea and connected directly to Cameron
horizontal trees utilizing a 6-5/8" Hydril tubing riser and
a rigid 2-3/8" tubing annulus line. Subsea control of the horizontal
tree was maintained at ENI's Allegheny Tension Leg Platform (TLP)
and subsea control of the Intervention Riser System was provided
from the Q4000. After connecting to the tree, slickline was used
to manipulate the completion's sliding sleeves for initial zone
isolation, and subsequent opening of the new production zone.
On completion of the first well, Green Canyon 516, the Q4000 transited
approximately 1.3 miles to Green Canyon 472, with the Intervention
Riser held at subsea depth. This approach reduced pipe handling
and saved approximately two days of operational time. Over the course
of the two well project, the riser system was deployed subsea and
in operation for a total of 21 days. Access, zonal isolation and
production delivery were accomplished as planned and both wells
are performing to expectation. The project was completed in line
with planned schedule and budget.
Cal Dive International, Inc., headquartered in Houston, Texas, is
an energy service company specializing in well operations and subsea
construction. CDI operates a fleet of technically advanced marine
construction vessels and robotics worldwide and conducts salvage
operations in the Gulf of Mexico. Energy Resource Technology, Inc.,
a wholly owned subsidiary, acquires and operates mature and non-core
offshore oil and gas properties.
For more information see http://www.caldive.com
Posted by Richard Price,
Editor Pipeline Magazine
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