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IMAGING
Completion Profiler
 ProTechnics has developed a new generation of production-profiling instruments capable of
measuring completion effectiveness.
To properly evaluate a completion, whether fracture stimulation, acidizing, or breakdown, operators must assess the placement of the completion fluids and slurries. The following questions should be asked:
- Did
the treatment enter into the entire perforated
interval?
- Did
the fluid treat all formation layers in
concentrations sufficient for achieving the
design objectives?
- Were
any portions of the net pay left unstimulated?
ProTechnics
can answer all of these questions and more. Our
advanced Zero Wash® tracers, coupled
with the SpectraScan Imager®, allow us
to detail the completion placement and
effectiveness of your hydraulic fracturing and
acidizing treatments. Zero Wash tracers, which won
the 1993 Meritorious Award for Engineering
Innovation, have proven to be accurate and cost
effective in verifying stimulation designs and in
identifying necessary improvements and
restimulation candidates from traced completions.
A new dimension in completion imaging has recently
been added with our Completion Profiler™,
a revolutionary production logging service, which
is available in conjunction with the SpectraScan
Imager. During a single trip into the wellbore,
Completion Profiler's additional imaging
capabilities allow you to view completion placement
and measure the flow rate and fluid properties
from each individual set of contributing
perforations. Bypassed pay zones are easily marked
for recompletion, and the quality of each zone's
stimulation treatment and its contribution to the
well's overall production are compared. (See
the Completion Profiler™
specifications.)
Whether
in single-phase or multi-phase flow, our superior
measurements, coupled with unrivaled completion
experience, produce the most comprehensive data
set and engineered analysis available in the
industry. Because these tools are memory-based and
combinable, they can be deployed on a variety of
mechanisms, including slickline, electric line,
and coiled tubing.
Applications
The
Completion Profiler can perform the following:
- Measure
zonal flow rates by layer. These measurements
include fluid-holdup fractions.
- Identify
intervals which are producing undesirable
fluids (water or gas.)
- Obtain
accurate bottomhole pressures, temperatures,
and respective gradients.
- Evaluate
cement channeling and stimulation-height
containment.
- Flag
unstimulated and understimulated pay for
recompletion.
Maximize
your well's performance by combining our
tracer-analysis expertise with the most robust
production logging measurements available on the
market today.
The
Completion Profiler performs simultaneous
measurements of pressure, temperature, fluid-flow
veloctiy, casing-collar location, fluid density,
and fluid capacitance. When combined with the
SpectraScan Imager, the Completion Profiler
provides a complete diagnostic image of your
completion's effectiveness.
The
Completion Profiler can be run as a stand-alone
device or in combination with the award-winning
SpectraScan Imager.
Advantages
Several
important advantages of the Completion Profiler
should be noted. An induction-type collar locator
adds a dimension of sensitivity not previously
available for detecting casing collars,
perforations, damage, and imperfections.
Additionally, the fluid-identification sensor is
unique in the industry because both fluid density
and fluid capacitance are measured simultaneously
within the same sample chamber rather than at
different depths in the wellbore. This measurement
method removes the uncertainty from fluid
identification in wells that are experiencing
turbulent or slug flow.
Using
the acclaimed PLATO analysis package, our
experienced reservoir engineers and log analysts
use the best available techniques, including
Global Statistical Analysis, Material Balance,
Energy Balance, and Momentum Balance.
Forward-modeling
allows more accurate calibration and
quality-control checks. PLATO is more than a
simple interpretation; it helps us understand your
well. PLATO provides three-phase analysis,
simultaneous use of depth and time data, a flow
profile from the spinner or temperature, and
quick, easy integration of new tools and
user-derived models.
The
completion image shown below reveals that the
lower fracture stage (X815 ft to X933 ft) is
producing the majority of gas and some water. The
gas production from the upper fracture stage (X720
ft to X775 ft) is much lower, indicating formation
damage or the presence of a poor-quality
reservoir. The completion image also confirms that
the upper fracture stage has grown down into the
lower fracture stage, causing the premature
screenout indicated by high tracer concentrations.
| Completion Profiler™ Tool Specifications: |
| OD |
1 11/16 in. (42.86 mm) |
| Length |
8.07 ft (2.7 m) in combo or 19.6 ft (5.98 m) as stand-alone |
| Pressure Rating |
15,000 psi (103, 448 KPa) |
| Temperature Rating |
350ºF (177ºC) |
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| Sensor Performance |
Resolution |
Accuracy |
| Fluid Capacitance |
1.6 Dielectric Constant Units (MKU) |
up to >80% watercut |
| Fluid Density |
.01 g/cc |
.01 g/cc |
| Pressure |
.02 psi (0.138 KPa) |
10 psi (68.97 KPa) |
| Temperature |
.01ºF (0.006ºC) |
1ºF (0.55ºC) |
| Flowmeter |
.0125 rps/fpm (0.04101 rps/mpm) |
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