Overview
OptiPort Multistage Fracturing System
Optimize hydraulic fracturing operations and reduce overall completion costs
Applications
„„
Shale reservoirs
„„
Other low-permeability reservoirs
„„
Coalbed methane
„„
Open hole and cased hole
Features and Benefits
„„
Nearly unlimited number of stages
–– Maximizes contact with
the reservoir
–– Improves reservoir drainage
–– Maintains the fracturing efficiency
of coiled tubing activated systems
„„
The Baker Hughes patent-pending
OptiPort™ multistage fracturing system
allows a nearly unlimited number
of fracture stimulations, while providing
the speed, reliability, flexibility, and
economics of optimized well completions
that operators desire.
The integrated system is comprised of
multiple pressure-balanced OptiPort collars
that are hydraulically opened using a
specially designed coiled tubing bottomhole
assembly (BHA). The BHA consists of a
mechanical casing collar locator used to
position the BHA across the collar, and
a packer that is used for opening the
collars and providing isolation from the
previous fractured zone. Also, the BHA
has a circulation sub which provides a
secondary flow path through the coiled
tubing. This additional flow path enables
real-time bottomhole pressure monitoring
through the static fluid column in the coiled
tubing. Real-time bottomhole pressure
monitoring allows operators to optimize
the frac treatment while decreasing the
risk of a premature screenout. However,
if a screenout does occur, the well can be
circulated clean by pumping down the
coiled tubing, reducing nonproductive time
(NPT). Optionally, the circulating sub can
be replaced with a sand-jet perforator to
establish communication at other points in
the reservoir besides the collars.
The OptiPort collars are delivered to the
rigsite, where they are run as part of the
completion liner string. They are strategically
placed in the wellbore to divert the fracture
to the desired location. The isolation
between the OptiPort collars is accomplished
by cementing the liner string or using
openhole packers.
When the coiled tubing and pumping units
arrive on location, coiled tubing is run and
the EasyTag casing collar locator is used
to accurately place the packer in the first
OptiPort collar. Once the packer is set,
pressure is applied on the coiled tubing
Real-time monitoring of bottomhole
pressure through the coiled tubing
–– Provides a better understanding
of what is happening downhole
–– Facilitates frac modification for
more effective treatment
–– Assists in preventing screenouts
„„
Rapid recovery from screenouts
via the coiled tubing already in
place in the well
–– Allows cleanout by circulating
between the coiled tubing and
the annulus
–– Lowers NPT if a screenout occurs,
„„
Full-bore access without milling
–– Cuts operational costs by
eliminating milling
„„
Installed as either openhole or
cemented completions
–– Gives operator choice of most
economic method
„„
No pumping required between stages
–– Reduces fluid usage
annulus, opening the ports and allowing the fracture treatment to
be pumped. The packer is then released and moved on to the next
collar where the process continues until all zones are treated. This
process does not require pumping between stages, minimizing the
total volume of fluid required.
The system does not have any inner diameter restrictions, so
the production conduit has full-bore access without the need
for post-stimulation milling, which further improves the speed
of the operation.
Contact your Baker Hughes representative today or visit
www.bakerhughes.com/optiport to find out how our OptiPort
multistage fracturing system can help you optimize hydraulic
fracturing operations and reduce overall completion costs.
www.bakerhughes.com
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