Cardinal Surveys Company
TRAC-III Annulus Production Logging
PROCEDURE - WELL PREPARATION
Production logs have long been used as a reliable source of information to optimize
profits on flowing wells. Cardinal's TRAC-III has made this proven service available to a
large number of wells that could not have been logged in the past. Annular production
logging is possibly the best means of acquiring "real time" data of dynamic
producing conditions in wells with rod pumps. Click for Adobe
Acrobat format Trac III paper or other literature.
The TRAC-III System was designed from conception to maximize operational success and
data quality. The TRAC-III logging string consists of a Scintillation Gamma Ray Detector,
(micro-processor controlled) Radioactive Ejector, Collar Locator, Capacitance Probe,
Caliper, and Temperature Tool. All sensors are housed in 7/8" O.D. cases to
facilitate passage down the tubing annulus.
Some benefits of running TRAC-III's are:
- Document baseline production profile for future references.
- Verify effectiveness of well treatments.
- Optimize pump placement.
- Discover unwanted water sources for remedial procedures.
- Correlate production results with injection profiles for sweep efficiency of floods.
The TRAC-III System has been designed for wells with 5?" casing and 27/8" tubing. The system can also be
used on any combination of bigger casing or smaller tubing.
It is possible to run the tools down the annulus between 4?" casing and 23/8" tubing. No pressure control can
be used at surface with this configuration and the well preparation is quite entailed.
However, it is not impossible. We have successfully logged down 4?" and 23/8" to 13,100' in Crane County
Well Parameters For Example Procedure
||30 BPD Oil
||140 BPD Water
||10 MCFD Gas
||5600' - 6000'
Cardinal Surveys Company
Annular TRAC-III ? Procedure
Fantasy Oil, Inc. Fox Gusher #45
The following procedure represents the fundamental steps needed to accomplish most
TRAC-III ? applications. However, due to the investigative nature of production logging,
it must be noted that the following procedure may be modified at any point in order to
optimize the definition of events or abnormalities. This procedure should be considered as
a general plan of action.
- Conduct tailgate safety meeting to identify location hazards, review well information,
review test objectives, and make necessary plans to maximize safety and test results.
- Rig up Cardinal Surveys logging unit on Fox Gusher #45 and conduct the pre-job wellhead
- Attach Cardinal Surveys 7/8" O. D. TRAC-III ? tool string which consists of a Rope
Socket (.875" x 15" with a 5/8" fishing neck), Capacitance Tool (.875"
x 40"), Caliper (.875" x 69"), Collar Locator (.875" x 28.5"),
Scintillation Gammaray Detector (.875" x 60"), Microprocessor Controlled Ejector
(.875" x 75.5") with I-131 as the tracer isotope, and a Temperature Tool
(.875" x 37").
- Shut down pump jack and lock in place.
- Determine means of pressure control (hand packoff or lubricator) and implement.
- RIH with TRAC-III ? tool string into the tubing annulus.
- Release and activate pump jack.
- Run Pumping Temperature and CCL Logs from 5,500 to 6,100.
- Run Gammaray and CCL Logs from 6,100 to 5,500. Correlate
Gammaray and CCL logs to supplied correlation log. Adjust depth measurement from Wireline
Depth to Measured Depth.
- Return TRAC-III ? logging string to T.D. at 6,100 and run Capacitance
Log from 6,100 to 5,500.
- Return TRAC-III ? logging string to T.D. at 6,100 and run Caliper
from 6,100 to 5,500.
- Place TRAC-III ? logging string above the zone of interest 5600 - 6000 and eject a slug
of radioactive material. As the slug travels up hole with the flow, make at least 3 passes
through the material with the recorder set to depth drive. Note the delta times from peak
to peak. This will allow for a 100% velocity reading.
- Repeat step 12 two more times.
- Repeat step 12 in areas between perforated intervals or between areas of interest in the
openhole section. Please refer to the caliper results from 5600 - 6000 when placing the
radioactive slugs. Try to avoid areas of drastic I. D. change to minimize the error in the
- Eject a slug of radioactive material below the zone 5600 - 6000 and above T.D. at 6,100.
Eject the slug as low as possible if there is no rathole. Make several passes through the
material to determine if there is any flow coming from below T.D. in the wellbore.
- Shut down pump jack and shut-in production.
- Allow well to remain static for approximately one hour.
- Run a Shut-in Temperature Log from 5,500 to 6,100.
- Cross Flow Checks, shoot a series of radioactive slugs
approximately 50 feet apart across the zone 5600 - 6000 and make timed passes through all
the slugs at the same time to determine if there is any cross flow between zones.
- Run a Shut-in Temperature Log from 5,500 to 6,100
approximately 2 hours after the well has been shut-in.
- It may be desirable to pull a Shut-in Capacitance Log at this
point from 6,100 to 5,500.
- POOH with Cardinal Survey's 7/8" O.D. TRAC-III ? production logging tool string.
- Rig down equipment, return well to pumping status, and conduct the post job wellhead
- Contact the Fantasy Oil, Inc. field representative to give preliminary results and the
current status of Fox Gusher #45.
The one key factor in rigging up for an Annulus TRAC-III is that you must have strick,
vertical clearance above the annulus valve. We must be able to lower the logging sonde
directly into the valve.
Click on the images for larger pictures.
With Lubricator (and riser)
running a Trac III Annular Log
- Turn Down Collars (Special Clearance Collars)
- We recommend that the tubing couplings
be tapered on each end (20 - 30 degrees) -
see this document.
Even better, you can install special clearance collars which are
slightly smaller than normal collars.
See this picture.
And see this drawing. These collars are tapered and have about 150
thousandths removed. This will make it much easier to get tools in and out
of the well, and in the case of deeper, crooked wells, will prevent
incomplete services. This is the best alternative for getting the tools in
and out. Bulldog Specialties can supply special clearance
collars in J-80, N-80 and L-80. They are manufactured by Tejas
Tubular. Bulldog is a whole-sale supplier, but most of the major
supply companies can get the Tejas couplings through Bulldog. (Click
on the following logos.)
- Install Flange
- Attach the "dual completion flange" where the annular
opening is pointed directly away from the pumping unit. Don't position the annular opening
under the flow line or bleed line.
- Install Annular Valve
- Be sure to attach the annular valve prior to configuring the production string. The
tight fit will not allow you to screw the valve in. Some customers don't rig up a valve on
the annulus. Cardinal does not recommend this practice! That valve is our last option in
an emergency situtation.
- Plumb Out Tee & Stuffing Box
- On most wells you will have to install an "Slimline Suffing
Box" and "Slimline Pumping Tee". There must be nothing hanging out over
the annulus valve. It can be a frustrating experience when preparing for an Annular Log
for the first time. Experiment with various connections until you can determine what works
best with your type of wellheads. Be sure and check the valve clearance with a piece of
black pipe or large sucker rod as you go. Our logging tools are over
20 feet long, and we need a straight shot into the well.
- Overhead Clearance
- Remove the bridle gaurd from the horses head and any other overhead objects that could
obstruct us. Our logging string can be as long as 20 to 30 feet.
- We must be able to back our logging unit up to within 2 to 3 feet of the wellhead.
Please remove any tubing, B.O.P., etc.. from the location.
- Stable producing conditions are crucial to running a TRAC-III that will give insight to
the well's normal production characteristics. This is important when the test objective is
to see the production profile. It is also important for determining the effects of a past
stimulation that has not performed as expected.
- If we run a TRAC-III immediately after the well is configured, it will only tell us what
the well does at that particular point in time. You want to allow the production to
stabilize, unless (drum roll) you have had a sudden, big increase in your water
- It does not matter if this increase of water production was brought on by a stimulation,
direct channel from an offset injector, or natural causes. Get busy, prepare your well for
a TRAC-III and call Cardinal. Time is critical. Don't wait for stabilization. There is a
strong possibility this new water is from a higher pressure source than anything you've
been producing. In these situations we regularly see crossflow into the proven oil zones.
We need to find the water source so that you can take remedial action. Remember, you will
have to pump out all those barrels of water that cross flowed in before you will get your
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