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Inertial Survey Products – Worldwide
Sales & Rental
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We
offer inertial survey products and support services for land seismic
projects. Our primary market is providing inertial systems to stake out source
and receiver positions in the oil and gas exploration business in forested
or mixed areas. A typical operation will include multiple inertial systems
with surveyors and cutting crews deployed into the client’s field
operations. Overseeing these field operations will be a survey supervisor
who is tasked with working within the client’s survey organization,
processing data and directing field operations.
Inertial
survey instruments replace theodolite-based total
stations in areas where GPS can’t be used for the whole project. This is
usually because some part or the entire zone is forested.
It is
important to note that using GPS in the clearings of a mixed area –and
leaving patches of lines not surveyed- is counter-productive. Better do the
whole prospect with inertial systems only.
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Worldwide operations 24/7/365
Responding to the needs of the international land exploration industry,
Zupt is on call 24-hours-a-day, seven-days-a-week. Our years of experience,
combined with our unique cutting edge survey technologies, assure that your
projects will be completed on time and within budget. We offer complete
inertial survey equipment sales, rental and training/support for your field
surveyors/operators. Our team supports land seismic operations worldwide.
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Inertial
surveyors are Your Drillers Best Friend
Inertial operators are experienced in the best use of inertial technology
in oil exploration. The production achievable from our inertial systems
demands a very close working relationship between field cutting crews,
clients drilling crews, your surveyors and the eventually the Zupt support
group. Our personnel fully understand the concerns and issues associated
with access and drilling/shooting productivity.
Inertial
surveyors will survey and provide access with the drillers’ productivity in
mind.
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Optimal cutting – low
impact – high productivity
Receiver lines: The conventional requirements
for perfectly straight and clear-cut receiver lines, geophone spacing and
cable limitations, still exist for your inertial operations. If the
occasional tree or shrub can be worked around without removing it, you can
leave it in place and keep producing. A large path will be cut for easy
access down the line.
Because you do not need line of sight you can leave these occasional
obstacles causing a very slight offsets (20cm or less) for the phone lines,
benefiting everyone while not affecting the juggies
and their ability to be productive - less cutting leading to less safety
issues, less environmental issues, time saved... You cut very straight
receiver lines and you optimize production while delivering high
quality survey.
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Shot
Lines: We understand the primary need
for high production drilling crews. A clear, well-flagged
line with easy access, appropriately cut is the primary focus when
working on offset or in-line shot lines.
Your inertial operators will ensure that drillers find the shot point
quickly, and their drills can progress quickly (safely) from shot point
to shot point: good access, good flagging. The same logic works for the shooters
when time is truly of the essence.
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… Driller and Shooter Friendly Survey
Inertial lines will give drillers far better access than conventional
crews. The slightly winding, well flagged path can move around thick bush
and give the drilling hardware easier access on manageable slopes. This is
to be compared with conventional (theodolite)
surveying techniques that can often lead to impossible slopes, cut trees
on the path and dangerous drilling conditions, just because the line
had to be cut perfectly straight due to the line of sight limitation (and
only for that reason).
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With optical surveys, drillers often need to move the shot
point a few feet away from the installed stake for access reasons: the
stake is placed by a fence, under a tree, on a berm
or a ditch making it impossible to drill. This action (driller moving the stake)
is detrimental to the overall accuracy of the seismic project, and is
rarely noticed. The drillers re-located drill point is rarely resurveyed.
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By using “driller
friendly” inertial surveyors on your project, the shot point will be
placed and surveyed in the right location - within offset specifications -
for the driller to feel comfortable drilling. This type of surveying will
also improve your drilling safety. Because our surveyors can avoid the very
difficult vegetation exactly like the drillers, they create a path of least
resistance - and less damage to the environment - that is many times
more productive for the drillers and also for the shooters,
therefore the path of best production for the crew.
We understand that an intelligent and knowledgeable inertial survey team
can significantly improve safety and seismic production.
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Survey
control
The inertial surveyor can undertake the installation of control to
ensure optimal production for his inertial units. This control network will
usually be established through triangulation, traversing or GPS:
post-processed GPS for the first order network and possibly RTK GPS for
example for second or third order.
A good
average value is 1 Control point every mile (1.6km) of straight line for
seismic.
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Standard Data Formats and Exchange
Our hand held computers/data loggers run our standard stake out software. Pre
plot files will be uploaded at the start of the day and "as
surveyed" data will be unloaded from the systems at the end of the
day. All industry standard data formats are supported by our software with
very easy transfers to/from GPSeismic™.
Operational quality indicators
Inertial zero velocity update drift control and error (rms
from Kalman co-variance matrix diagonals)
analysis is available for our units during operations to ensure quality
control of all installed locations. Immediate QC is available at ties made
throughout our daily operations.
Field proven hardware and software
Zupt’s land seismic inertial systems are
constructed with state of the art inertial measurement units (IMUs) with customized navigation software specifically
designed for seismic operations. We even have state of the art custom
battery packs specifically designed for our field units to ensure maximum
power to weight ratios to minimize the load on our field personnel.
Freezing to boiling
These systems are designed to work from the heat and humidity of the
tropical rain forests to the severe cold of the Northern Canadian
territories. These systems will survive wherever land seismic crews will
operate. As such, the systems have been ruggedized
and temperature rated for operations from –10ºC to + 45ºC and enclosed in
casings to allow for rain, sand, snow and dust.
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Conventional Cutting - slows
down production and impacts the environment
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Cutting for inertial allows
crews to progress at much faster rates and leaves minimal impact at the
location.
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We are not your
normal sales and rental company!
We only offer inertial survey services in support of seismic survey
operations. We do not offer purely GPS or conventional survey products. Our
focus is on the productive use of inertial technology in the field.
Land Seismic – Why Inertial?
Surveying in canopy/forest and urban canyon areas for land seismic
acquisition.
In many active geographical regions of land seismic exploration the canopy
(trees/forestation) is such that RTK GPS cannot be used for the precise
installation of survey stakes. The high-frequency radio signals from the
satellite segment of the GPS system (1.2 to 1.6 Ghz)
cannot penetrate through the vegetation to the receivers being carried by
the field surveyors.
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Various optical survey techniques have been tried in the past, to overcome
the lack of GPS signals in these environments. Conventional (optical)
techniques are primarily used when the canopy/terrain limits GPS
operations.
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Testing conditions
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Conventional/Optical
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This optical survey technique requires extensive cutting/clearing to allow
access for the survey crews and “line of sight" for the surveyors to
operate. This cutting takes significant time and causes some impact in the
surveyed areas due to the removal of vegetation. The cost of slow
production of conventional survey crews can be overwhelmingly improved upon
through the use of Zupt’s inertial survey
capabilities. One inertial survey crew can deliver the production of two or
three conventional crews.
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Zupt’s inertial solutions only require minimal
cutting/cleaning to allow access. These systems deliver exceptional
productivity and quality. Zupt can deliver if low impact surveying is a
requirement on your job.
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