VentPac AFSM Service

Stimulation
VentPac AFSM Service
Enables Higher Production Rates and Enhanced Reserves Recovery Through
Vent Screen Completions
ent screen completions are a reliable method of
improving workover and completion economics. With
this method, zones previously bypassed as uneconomical to
complete may now, in many cases, be effectively monetized.
VentPac AFSM service offers important benefits compared to
conventional vent screen completions:
V
Higher production rates while
maintaining mechanical integrity.
HAL12217
Completions using VentPac AF service are, in some cases,
producing over 30 MMscfd compared to a maximum of
only 6 to 8 MMscfd from conventional vent screen
completions while maintaining mechanical integrity of the
completion. Higher production rates can result in enhanced
reserves recovery, accelerated cash flow and improved NPV
of the completions.
Vent screen completions using
VentPac AF service provide an
engineered completion design and
a more durable pack that enables
higher flow rates and more
Enhanced conductivity and fines control.
Halliburton’s exclusive AntifluidizationSM service technology
enhances pack conductivity and helps control fines
migration and pack plugging.
Unmatched execution. Halliburton is the industry
dependable completions than with
leader in vent screen completions and has installed more
successful high rate completions than any other service
company.
conventional methods. Plus,
VentPac AF service takes full
advantage of Halliburton’s
industry-leading experience in
Predictable production rate window.
designing and installing vent
Conventional completions require trial and error to
determine a workable flow rate. The design capability
included in VentPac AF service enables accurate prediction
of a production range that will take full advantage of the
completion’s capabilities. Trial and error methods that risk
pack failure are not necessary.
screen completions.
Wireline
Fishing Neck
Reduced time exposure. Faster reserves recovery
Bow Spring
Centralizers
reduces the risk of completion failure.
HAL12218
more durable pack provided by VentPac AF service means
flow rate doesn’t have to be restricted in case of a screenout,
planned or unplanned. In addition, this feature may
eliminate the need for coiled tubing cleanouts.
Cn00845
Higher production rates even with
incomplete blank section coverage. The
Close, multiple stacked pays can be
completed independently if necessary.
VentPac AF service enables running a shorter, more compact
completion assembly, enabling close pay to be completed.
HALLIBURTON
Proper design and the durable pack
provided by VentPac AF service enhance
completion reliability.
Failure of a rigless completion may result in a much more
expensive rig-based intervention including a side-track.
Conventional completions usually result in lower rates (high
skin) due to ineffective near wellbore stimulation.
VentPac AF service provides a properly designed blank
VentPac AF service can be tailored to
well conditions.
Depending on the level of flow velocity and the probability
of proppant pack fluidization, one of several versions of
VentPac AF service can be applied for an optimum completion:
• VentPac AF - LR for low production velocity completions
that may or may not require Antifluidization service and
that require a modest amount of engineering design.
section, critical to a vent screen completion. Blank section
• VentPac AF - MR for medium production velocity
length and diameter are functions of flow rate, fluid
completions that require moderate performance
properties, casing size and well deviation. In addition,
Antifluidization technology increases the cohesive forces
between pack grains to stabilize the pack, reducing the risk
of mechanical failure.
Antifluidization service and typical engineering design.
• VentPac AF – HR for high production velocity
completions that require high performance
Antifluidization service and extensive engineering design.
Well suited for monobore and
deepwater applications.
The effectiveness of VentPac AF service makes the
technique an optimum monobore sand control completion.
Plus, operators are planning deepwater projects to include
future high-rate vent screen recompletions using
VentPac AF service.
• VentPac AF – EHR for extremely high production
velocity completions that require advanced
Antifluidization service and leading-edge engineering
design.
These classifications can generally be determined based on
anticipated flow rates and casing size. See Figure 1.
Gas Well (MMCFD)
Casing Size
2
6
8
10
15
3-1/2 in.
20+
EHR
HR
Figure 1 - Guidelines for
choosing which version of
VentPac AF service will
help provide an optimum
MR
LR
9-5/8 in.
completion.
Oil Well (BOPD)
Casing Size
10
1000
2000
3000
3-1/2 in.
3500+
EHR
HR
MR
LR
Note: Not for engineering purposes.
HAL12219
9-5/8 in.
Job Example
Rate vs. Fluidization
200
180
Conventional Sand
160
Percent of Failure
140
VentPac AF LR
120
VentPac AF MR
VentPac AF HR
100
80
60
40
20
0
8000
12000
16000
20000
24000
28000
32000
36000
40000
Rate (MMSCFD)
HAL12220
4000
Figure 2 - The graph is a sample analysis from a gas well in the Gulf of Mexico with 90 ft of blank assembly in a well that was
deviated 55˚ across the zone of interest. The casing size was 7 in. and the blank size was 1.660 in. The graph plots the rate of the
well’s producing relative to the fluidization point (i.e. failure point). The graph shows the varying versions of the VentPac AF system and the associated achievable maximum production rates.
Case History: GOM - Vent Screen
Completion using VentPac AF Service
Achieves Over 30 MMscfd Production
Rate
Hydrocarbons in this field are located in fault trap reservoirs
and are normally pressured and produced by a water drive
mechanism. The operator’s development strategy involves
developing deep oil reserves and exploiting shallow gas
reservoirs. For the shallow gas completions, the operator
requires a process that is economical in comparison with
current rig rates, minimizes mechanical risk, and does not
sacrifice the best practices developed for sand control
completions in that area. For this well, Halliburton
recommended VentPac AF service for a single-trip,
coiled-tubing- deployed, rigless completion.
SM
First, DepthPro wireless casing collar locator service was
used for depth control. Then, the lower depleted interval
was plugged by setting a cement retainer and squeezing.
On the next run, Vanngun® TCP guns and the screen
section were run in tandem. The spent TCP guns were set
down on the cement retainer and used as a base for the
screen. A vent screen completion using VentPac AF and
Ex-tension PacSM services was then performed using the
dual injection method at 10 bpm.
Results: Over a 5-day period the choke size was increased
and a peak production rate was gauged at 30 BOPD / 30.1
MMscfd / 0 BWPD with FTP of 1,964 psig. The well was
considered to be producing at an optimum rate based on
pack fluidization. The peak gas production rate for this well
represents the third-highest peak gas production rate in the
field. Although the well watered out after 90 days, the high
production rate made the completion economical. Over the
course of producing the well, no gravel or produced sand
was ever noted in any shake-out taken on the well’s
liquid production.
VentPac AFSM service offers important benefits
compared to conventional vent screen completions:
• Higher production rates while maintaining mechanical integrity.
• Enhanced conductivity and fines control.
• Unmatched execution.
• Predictable production rate window.
• Reduced time exposure.
• Higher production rates even with incomplete blank section coverage.
• Close, multiple stacked pays can be completed independently if necessary.
For more information about how VentPac AFSM service can help
improve the NPV of your vent screen completions, contact your local
Halliburton representative or email [email protected].
www.halliburton.com
Produced by Halliburton Communications
HALLIBURTON
H03343 08/05
© 2005 Halliburton
All Rights Reserved
Printed in U.S.A.
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