Roxar Watercut meter Data Sheet
Roxar Watercut meter
FA-T210-I
Product Data Sheet
04.04.2016
Roxar Watercut meter
Emerson Process Management and its portfolio of Roxar Flow Measurement solutions is a
pioneer in the development of microwave resonance technology for watercut measurement.
Starting in the early 1990’s, we have built up a wealth of expertise and installations worldwide.
Roxar Watercut meters are installed across the world,
often in some of the most challenging environments,
both onshore and offshore.
With different models that measure from 500 ppm
to 100% water, the Roxar Watercut meter covers any
application where accurate and drift free determination
of water content is crucial.
A commitment to providing support and service
through our Flow Lifecycle Services organization
ensures that our meters operate at peak performance
throughout the field lifecycle. Roxar also offers a
comprehensive portfolio of topside, subsea and
downhole instrumentation and meters.
www.EmersonProcess.com/Roxar
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Application Overview
Production Net Oil
Operator benefits of using a Roxar
Watercut meter
Two component well test and
production measurement
Oil Pipeline
Allocation, fiscal measurement
and gathering (crude, BS&W
and condensate water)
•
•
Refinery Crude Feed
Desalter feed and control
•
•
Refined Pipeline
Determines the oil and water production rates without
separation.
Maximizes production by immediately showing the
effects of your efforts to enhance oil/water separation and
decrease retention time.
Detects and tracks water content changes as low as 50
ppm – a sensitivity matched by no other technology.
An innovative alternative to conventional sampling with
several countries and oil companies having substituted
conventional sampling for the Roxar Watercut meter for
fiscal reporting and even for the automatic re-routing of
oil back into the process when the watercut exceeds the
commercial level.
Fiscal quantity and quality
measurement
Shipping Terminals
Fuel, refined product and crude
loading and un-loading
Red dots indicate Roxar Watercut meter locations or
measurement points.
2
The Roxar Watercut Measurement
Principle
The Roxar Watercut meter uses microwave technology to
measure the permittivity of any oil/water mixture. The watercut
is then calculated by comparing the mixture permittivity
with the dry oil and water permittivities. The permittivities of
water and oil are fundamentally different (typically 70 vs. 2),
due to the difference in molecular structure between the two
liquids. The oxygen atom of the water molecule has an affinity
for the electrons of the two hydrogen atoms which results in
the electron density on the oxygen atom being greater. This
results in the water molecule having a positively charged
side and a negatively charged side. Because of this, the water
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molecules will continuously try to align themselves with the
changing microwave field, which in turn will slow down the
propagation of the microwaves. As hydrocarbon molecules have
a much more symmetrical structure and do not respond to the
The Microwave Resonance™ frequency with empty sensor fvac
is measured with high precision equipment at the factory and
stored in each unit as a calibration constant. This means that the
meter does not need periodic recalibration.
This unique technology provides a number of advantages over all
other watercut meter technologies. These include:
•
•
•
•
•
•
Fiscal accuracy
Long term repeatability (no drift)
Sensitivity as low as 50 ppm water
Independence from electronics temperature
Measures full cross section of up to 32” pipe
Low maintenance
Representative Measurement
The Roxar Watercut meter measures the mixture permittivity,
and uses this to calculate the watercut.
changing microwave field in the same way, they therefore have
an insignificant affect on the propagation of the microwaves.
Due to this distinct difference in dielectric properties between
water and oil, the industry has widely recognized this principle
for providing superior sensitivity to water in oil over conventional
density or optically based principles.
Measurement Technology
Why microware resonance
technology?
A number of methods are used to determine the watercut.
Unlike other technologies, Roxar’s unique Microwave
Resonance™ technology allows an energy peak to occur at a
frequency defined solely by the contents of the sensor, unaffected
by the temperature of the electronics, ageing and calibration etc.
As the watercut increases, the propagation of the microwaves is
increasingly counteracted, causing a corresponding decrease in
Microwave Resonance™ frequency.
The Microwave Resonance™ technology is the only method
that allows for a very simple, scientific correlation between
the Microwave Resonance™ frequency fmix and the mixture
permittivity mix.
ε
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Sampling has been used to periodically check watercut values.
However, there are limitations in this method due to the errors
introduced by sampling data not being representative.
The Roxar Watercut meter solution ensures accurate results as
the measurement is taken across the entire span of the flow,
whereas an insertion probe, for example, is only able to provide
measurement for the flow the sensor comes into contact with.
Therefore should there be any variances in the water content
within the flow, an insertion probe is challenged not only by its
own accuracy uncertainty, but the variances within the flow.
Maintenance - Reliability
The Roxar Watercut meter is designed for minimum
maintenance. The meter has no moving parts and its full bore
design means that the measurement is not susceptible to issues
related to scaling, waxing etc. This compares to insertion devices
which can be compromised when the measurement element is
coated or damaged by deposits. In addition, the Roxar Watercut
meter does not require any dynamic calibration for set up or
continued performance.
Other considerations
Density measurement can be used to calculate watercut, but
this requires accurate fixed inputs for component densities and
is limited when considering applications with heavy oil, very low
watercut or very high watercut.
Capacitance is a well established technology for measuring
watercut. Whilst useful for applications with very stable process
conditions and low watercuts, there are a number of limitations
and in particular a dependency on periodic recalibration to
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04.04.2016
maintain accuracy. Infrared absorption is by the nature of the
measurement suited to applications with watercut 90% or
higher, especially considering its ability to handle changes in
salinity. Conversely, because infrared light is absorbed by oil then
at very low watercut it is difficult to measure a signal if all the
light is absorbed. Using an insertion probe design for this type
of technology may reduce capital costs, but sometimes impacts
accuracy if the flow is not well mixed and anything that coats
or damages the sensor can require frequent maintenance for
cleaning or even replacement. Most electromagnetic methods
depend on experimental correlations between the system
response and the mixture permittivity. These correlations are
sensitive to – and must include correction for – the temperature
of the electronics.
Standard sizes and ranges
The different Roxar Watercut meter models are all in-line (flow through), measuring the watercut on the full cross section of the pipe.
Available Sizes:
• 2” – 3” standard sizes (FC)
• 1” – 12” standard sizes (LC/HC)
• 14” and upwards non-standard sizes
(LC/HC)
Options:
Top Cut Function*
AutoZero
AutoSalinity
*Extends LC/HC to 100% Watercut
AutoZero
TopCut
AutoSalinity
AutoZero is a patented feature, only
available with the Roxar Watercut meter.
Using a density input from a densitometer
or coriolis meter (typically 4-20mA or
bi-directional serial connection), the
Roxar Watercut meter can automatically
compensate for changes in fluid density in
real time. This ability is highly valuable as it
gives operators confidence that even when
properties of the fluids passing through
the Roxar Watercut meter are changing
(e.g. when testing multiple wells) then the
meter will use the live measured density
for optimum accuracy.
The standard Roxar LowCut (LC) & HighCut
(HC) Watercut meters have an upper limit
for watercut (15% and 50% respectively).
The TopCut function enables measurement
when the meter is out of range by using a
density calculation (requires AutoZero),
and in this way is able to provide watercut
readings up to 100%. This option is perfect
when testing wells that are mainly in the
0-15% or 0-50% watercut range as it allows
for measurements still to be achieved
when the watercut exceeds the stated
range of the meter.
AutoSalinity is a function exclusively for
the FullCut (FC) meter, as it is implemented
for water continuous conditions only. For
the FC meter, the AutoSalinity function
automatically compensates for the salt
content in the water fraction. The meter
interprets the microwave signal to find the
salinity of the water, and then makes use of
this to produce accurate measurements.
LC and HC Watercut meters are not
affected by varying salinity.
Please note this feature can be retrofitted
to most Roxar Watercut meters by our
Service team as required.
4
The AutoSalinity feature performs with
all different types of salt and there is no
need for the type of salt to be input. The
AutoSalinity function actually measures
conductivity, and uses this measured
conductivity
to
correct
watercut
measurements.
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Roxar Watercut meter
04.04.2016
General Information
Layout drawing aluminum enclosure
Meter body
spool piece
Electronics
Enclosure
Temperature
Transmitter
Digital I/O
Layout drawing SS316L enclosure
Design temperature
-15 up to + 120° C (266° F) standard (can be extended to -29° C)
-40 up to + 150° C (302° F ) extended (available up to 10” WCM sizes)
Haz. area approval
Simple apparatus
Materials / wetted parts
Roxar standard materials (see comments under the table)
Manufacturing
procedures
ASME / NORSOK compliant
Pressure drop
Max. 0.3 bar
Mounting
Typically 2 meters from spool piece
Ambient Temperature
-20 to 60° C (-29 to 140° F) Non-IS signal
-20 to 48° C (-29 to 118° F) IS signal
Voltage Supply
18-24 VDC
Power Consumption
Up to 24 W, max. 30 W at start-up
Model
Rosemount 644 H
Range
0 - 100° C (32 - 212° F)
Accuracy
± 0.15° C
Interface
4 - 20 mA HART
Transmission Length
1200m (RS 485)
PED certification is provided for all meters to be delivered in Europe, with the exception of the 1” LowCut meter as its small size falls
outside the requirements of this certification.
1” - 4”:
Standard: Duplex UNS S31803 NACE MR 0175, ISO 15156
Non Standard: SS316, others on request.
www.EmersonProcess.com/Roxar
6” upwards:
Standard: carbon steel NACE MR 0175, ISO 15156
Non Standard: SS316, others on request.
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Performance Specifications
LowCut
Calibration method
In-line2)
HighCut
TopCut3)
In-line2)
FullCut
TopCut3)
In-line2)
Range
0-1%4)
1-15%
15-100%
± 0-1%4)
1-50%
15-100%
0-100%
Uncertainty1)
±0.05%
± 5%
o.r
± 5%
±0.05%
± 5%
o.r
± 5%
± 1%
Repeatability 1)
±0.01%
±0.05%
(typ)
±0.01%
±0.05%
(typ)
±0.25%
Sensitivity 1)
±0.005%
±0.25%
(typ)
±0.005%
±0.25%
(typ)
±0.05%
Response time
0.4 - 0.7s
1s
0.4 - 0.7s
1s
0.7s
Effect of temperature variations
Automatic compensation
Effect of density variations
0.027% water per 1 kg/m3 (Automatic compensation with AutoZero option)
Effect of pressure variations
0,0025% water per 1 bar (Automatic compensation with AutoZero option)
The values indicate absolute effect on % water, except where % of reading (% o.r.) is indicated. Specifications require turbulent flow, i.e. water droplets no bigger than 1/10th of pipe
diameter.
2
The uncertainty specifications for the different ranges assume that the meter has been calibrated against a manual sample taken at the location of the meter. Maximum uncertainty when using such in-line calibration method is ± 1% absolute.
3
Specifications in this column are only applicable if the TopCut option is included. The TopCut option requires a line density input from a densitometer, and provides a density based
estimation of % water if the watercut goes above the specified measurement range of the meter.
4
The uncertainty in this range is given at 95% confidence interval (approximately 2 std. deviations) in order to comply with ISO 3170 for manual sampling, which is normally used as
the reference during in-line calibration. The expected accuracy (std. deviation) is approximately half of the given figures, i.e. ± 0.025%.
1
Ex-enclosure Details
6
Model Code
ATEX
IECEx
CSA
Hazardous area approval
ATEX II 2G Ex d e[ib] IIB T6
Gb
IECEx II 2G Ex d e[ib] IIB
T6 Gb
Class 1, Div2, Group C,D
Ingress Protection
IP66
IP66
NEMA7
Material
Stainless Steel
Stainless Steel
Copper free aluminium
Weight
70 kg
70 kg
40 kg
Size (W x H x D)
665 x 360 x 215 mm
665 x 360 x 215 mm
444 x 413 x 266 mm
Cable entries
6 x M20
6 x M20
4 x 1/2” NPT, 2 x 3/4” NPT
Temperature transmitters
(optional)
EEx d IIC T6
EEx d IIC T6
Class 1, Div.1, Group B,C,D
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Roxar Watercut meter
04.04.2016
Installation Details and Requirements
Installation Requirements
•
•
With flow rates lower than 1 m/s,
additional mixing may be required.
This can be achieved by installing
a static mixer, a blind-T or multiple
pipe bends or other instruments just
upstream of the meter.
The recommended maximum fluid
velocity is 7 m/s. Higher velocities are
possible and should be checked with
Roxar.
Horizontal or vertical installation
can be used. An explosion proof
enclosure should typically be
mounted within 2m of the meter
body.
PC for
setting up
Meter
Control Room
Metering Flow
Computer
The Roxar Watercut meter should be
installed in a location with a wellmixed flow.
Supply:
21-35 VDC
SAFE AREA
HAZARDOUS
AREA
Com. 2: MODBUS
(RS-485)
Com. 1:
RS-485
4-20 mA HART Density
Input
TT
2 x Coax Cables
4-20 mA HART Temperature Input
Electronics
Closure
ROXAR SUPPLY
Typical block diagram for a Roxar Watercut meter (common for all models)
Meter set-up and calibration
During factory set up, the only test required is the determination
of fvac which remains constant for the meter’s life.
A static calibration using known hydrocarbons can also be carried
out as part of the factory acceptance test. Inline calibration can be
periodically carried out comparing the meter to a representative
sample.
Customer information required
For Budget Quotations, a price and delivery estimate can be
provided on the basis that pipe size, flange rating and water %
range are provided.
•
•
•
Design Temperature
Operating Pressure
Operating Temperature
If there are any relevant client and/or project specifications that
need to be considered, we advise that these are sent as early as
possible for review as they may impact cost and delivery. In our
experience, Roxar standard specifications for materials,
documentation etc. are more than sufficient to satisfy most
requirements. In the event that these types of specifications are
not received until Purchase Order placement, then we reserve
the right to re-quote with additional cost and delivery impact
where applicable.
For Firm Quotations (and to be confirmed before placing any
Purchase Order) then the following additional information
should be provided:
•
•
•
Minimum and maximum flow rates
Fluid density
Design Pressure
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Options, documentation and service
Additional deliverables
Indicates which types of additional deliverable options are
available:
WFAT
Witness FAT according to Roxar standard procedure.
PMI CDF
Roxar standard documentation plus customer front pages and
decals.
CUSTDOC
Client specific documentation–1 review cycle only.
Post delivery services
Positive Material Identification can be carried out upon request
and would be performed in accordance to EN 10204/3.1.
To get the most out of your equipment, Roxar can provide a full
range of post delivery services including:
PAINT Class room training
Can be offered according to Roxar standard painting procedure.
Customer should specify whether meter body painting requested
or electronics enclosure painting requested. Customer should
specify whether the meter body will be insulated after installation
as this determines the paint system that is used.
Typically a two day course for a minimum of 4 participants at a
Roxar world area service centre.
MOUNTING STAND AND SUNSHIELD Stainless
steel
mounting stand for electronics enclosure including optional
sunshield recommended for ambient temperatures higher than
60 degrees Celsius.
Technical service agreements
COAX 3.5
For more details and to request a quotation for post delivery
services, please contact your local sales representative or e-mail
roxar.gsc@emerson.com.
1 pair, 3.5m long coaxial cables (24VDC only, can be provided on
special request).
Spare parts
COAX 1
1 pair, 1m long coaxial cables
COAX 2
1 pair, 2m long coaxial cables
TEMPERATURE TRANSMITTER
Rosemount, 644 series
Installation & commissioning support
To ensure the optimum set up for equipment performance.
Longer term service agreements with regular maintenance,
24/7 helpdesk support, data analysis, spare parts etc. to support
ongoing operations and secure long term performance.
Additional options
Densitometer
The Roxar Watercut meter can utilize density taken from a
Densitometer in order to provide automatic compensation for
changing fluid density.
We recommend MicroMotion Densitometers and can offer these
as part of an integrated offer.
Documentation
Indicates which types of documentation options are available:
STDDOC
MRB, including pressure test report, material certificates,
welding & test records etc, included with delivery. Please refer to
VDL, page 17 of the brochure.
8
Customer-specific coating
If customers have specific project requirements for the coating of
meter bodies or the electronics enclosure, it is possible that this
can be accommodated at additional cost on the basis that the
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Roxar Watercut meter
04.04.2016
appropriate specification is sent to Roxar for review in advance
of any Purchase Order placement. Customers should specify
whether the meter body will be insulated after installation as this
determines the paint system that is used.
Coriolis meter
The Roxar Watercut meter
can utilize density and flow
measurements taken from a
Coriolis flow meter in order to
provide automatic compensation
for changing fluid density and
enable calculation of dry oil and
water flow rates.
We recommend MicroMotion Coriolis flow meters and can
offer these as part of an integrated offer for any two phase flow
measurement solution where water and oil determination is
needed.
Flow Lifecycle Services
As a critical component to any production process, you need
to be able to partner with a service provider that can ensure
the integrity of your flow assets and help you maximize output,
minimize cost, and manage risk. Emerson’s Flow Lifecycle
Services understand the challenges and can help you overcome,
improve, and progress your operation for the long term.
From an expanded network of service centers across the globe
we offer access to local technicians and engineers for timely
response and professional service support for:
•
•
•
•
•
Installation, Commissioning and Start-Up Services
Repair and Maintenance Services
In situ (inline) Calibration
Helpdesk Service
Original Parts Supply
Emerson-Certified Services secure:
• Service Technicians and Engineers that are trained and
certified according to rigorous standards and compliant
with ISO9001.
• Calibration, diagnostics and maintenance services follow
approved processes by using certified equipment and
original parts delivering long lifetime and warranty for the
products and services rendered.
• Certified Service Engineers are supported by Roxar Global
Support Teams offering them dedicated application
experience to ensure the optimal solution for your
challenges.
www.EmersonProcess.com/Roxar
Educational Services
Knowledge of process control devices within a plant is often
passed down from generation to generation. At the same time,
if advances in process technology and methodology usually
brought about by training aren’t brought into the plant, inhouse standards for device setup and maintenance can become
based on outdated theory. Emerson Educational Services has
made a global commitment to helping our customers find and
keep that promise of performance. Roxar Watercut meters
are supported by a practical classroom conducted training
program.
The aim of the course is to enable participants to take full
advantage of the meter in real applications. Upon completion
of the course participants should be able to efficiently run
the instrument their own including delivering on-site quality
reliable data, do normal routine maintenance, fault finding and
troubleshooting.
Courses are run by certified instructors who combine their
understanding of theory with their unrivalled, on site practical
experience.
Factory Calibration and Refurbishment
Services
If Roxar instrumentation needs a major overhaul, or repair
Roxar Service offers access to our ISO 9001:2004 certified
manufacturing plants securing high quality workmanship and
fast turnaround.
Performance Evaluation Services
Transforming Measurement Data into Decisions
Performance Evaluation Services help you build confidence in
your decision-making process through clear and concise advice
on integrity management and actionable recommendations for
well and reservoir optimization.
We are able to assist you in optimizing integrity and
performance of assets safely through unmatched combination
of instrument and analytics expertise, technical knowledge and
project experience.
For more information on services contact us at roxar.gsc@
emerson.com.
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Roxar Watercut meter
04.04.2016
Vendor Document List
Document Delivery
Doc
No.
Rev.
Administrative Project
Information
Delivered
Included
In
Format
For
Info
For
Review
Final
Doc
TBA
TBA
Vendor Document List (VDL)
For Info
Bid
PDF
WP
N/A
N/A
Project Plan
For Info
N/A
PDF
4WAOA
N/A
N/A
Quality Control & Inspection Plan
For Info
N/A
PDF
4WAOA
N/A
N/A
TBA
TBA
TBA
TBA
Design Information
TBA
TBA
Instrument Data Sheet
For Info / For Rev. /
Final Doc.
UM
PDF
WP
1 WAOA
2WAD
TBA
TBA
General Arrangement Drawings
w/ part list
For Review / Final
Doc.
UM
PDF
N/A
4WAOA
2WAD
TBA
TBA
Layout Drawing w/ fixing details
For Review / Final
Doc.
UM
PDF
N/A
4WAOA
2WAD
TBA
TBA
Wiring Diagram
For Review / Final
Doc.
UM
PDF
N/A
4WAOA
2WAD
TBA
TBA
Block Diagram
For Review / Final
Doc.
UM
PDF
N/A
4WAOA
2WAD
Operational Information
TBA
Supplier Doc
Certificate of Conformity
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Hazardous Area Certificate ATEX
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Hazardous Area Certificate CSA
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Roxar Supplier Declaration of
Conformity
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Final Documentation Index
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Commissioning and Start-up
Procedure
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Installation and Operating
Instructions
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Bi-directional Com 2 Protocol
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Modbus Communication Protocol
(N/A for FC meter version)
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
TBA
TBA
Spare Parts List Commissioning
and 2 years of operation
For Info / Final Doc.
UM
PDF
4WAOA
N/A
2WAD
Fabrication Information
TBA
TBA
FAT Report
Final Doc.
MRB
PDF
N/A
N/A
2WAD
TBA
TBA
Pressure Test Report
Final Doc.
MRB
PDF
N/A
N/A
2WAD
TBA
TBA
Protective Coating Report
Final Doc.
MRB
PDF
N/A
N/A
2WAD
TBA
Supplier Doc
Material Certificates
Final Doc.
MRB
PDF
N/A
N/A
2WAD
10
www.EmersonProcess.com/Roxar
Roxar Watercut meter
04.04.2016
Document Delivery
Doc
No.
Rev.
Administrative Project
Information
Delivered
Included
In
Format
For
Info
For
Review
Final
Doc
TBA
Supplier Doc
Welding and Test
Documentation
Final Doc.
MRB
PDF
N/A
N/A
2WAD
TBA
Supplier Doc
Transmitter Documentation
Final Doc.
MRB
PDF
N/A
N/A
2WAD
TBA
Supplier Doc
Local Display Documentation
Final Doc.
MRB
PDF
N/A
N/A
2WAD
WP: With Proposal
WAOA: Weeks After Order Acknowledgement
WAD: Weeks After Delivery
CIS
Tel: +7 495 504 3405
Head Office Roxar products:
Tel: +47 51 81 88 00
E-mail: info.roxar@emerson.com
www.EmersonProcess.com/Roxar
Europe
Tel: +47 51 81 88 00
North America
Tel: +1 281 879 2600
Middle East
Tel: +971 4 811 8100
Asia Pacific
Tel: +60 3 2177 4450
Australia
Tel: +61 8 9208 1600
Latin America
Tel: +55 21 2217 8600
©2016 Emerson Electric Co. All rights reserved.
The Emerson logo is a trademark and service mark of Emerson Electric Co. Brand name is a mark of one of the Emerson Process Management family of
companies. All other marks are the property of their respective owners.
The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to
be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales
are governed by our terms and conditions, which are available on request. We reserve the right to modify or improve the designs or specifications of
our products at any time without notice.
The Roxar products are protected by patents. See http://www2.emersonprocess.com/en-US/brands/roxar/aboutus/Pages/Roxar-Patents.aspx for
details.
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