ALTUS
™
Net Oil Computer Manual
May 2000
ALTUS
™
Net Oil Computer Manual
For technical assistance, phone the Micro Motion Customer
Service Department:
• In the U.S.A., phone 1-800-522-6277, 24 hours
• Outside the U.S.A., phone 303-530-8400, 24 hours
• In Europe, phone +31 (0) 318 549 443
• In Asia, phone (65) 770-8155
Copyright ©1998, Micro Motion, Inc. A l l rig h ts res erved.
Micro Motion, ELITE, and BASIS are registered trademarks, and ALTUS is a
trademark of Micro Mo tion, Inc., Boulder, Colorado. Hastelloy is a registered
trademark of Haynes International, Inc., Kokomo Indiana. Inconel is a re gi st er ed
trademark of Inco Alloys International, Inc., Huntington, West Virginia. Teflon is a
registered trademar k of E.I. DuPont de Nemours Co., Inc., Wilmington, Delaware.
Contents
1 Before You Begin
1.1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Application software described in this manual. . . . . . . 1
1.3 Introduction to the ALTUS
Replacing an older NOC and transmitter. . . . . . . . . . . 1
Water cut determination . . . . . . . . . . . . . . . . . . . . . . . 1
NOC capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Installation Considerations
2.1 Piping arrangement and ancillary equipment . . . . . . . 3
2.2 Sensor installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Sensor orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Avoiding inaccurate flow counts . . . . . . . . . . . . . . . . . 6
2.3 Flow direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Using the Person-Process Interface
3.1 Person-Process Interface . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Security button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Function buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Cursor control buttons . . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
™
NOC . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . .
1
3
9
ALTUS™ Net Oil Computer Manu al
4 Configuration
4.1 Recording the configuration. . . . . . . . . . . . . . . . . . . . . 15
4.2 Configuration sequence. . . . . . . . . . . . . . . . . . . . . . . . 15
Step 1 Configure well performance measurements . . . . . . . . 15
Mode of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Units of measurement . . . . . . . . . . . . . . . . . . . . . . . . . 16
Well data-densities . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Compensations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Step 2 Configure system data. . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 3 Configure inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Flow variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Density inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Sensor calibration data . . . . . . . . . . . . . . . . . . . . . . . . 28
Sensor information . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Step 4 Configure outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Discrete outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Milliamp outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Pulse output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
i
Contents
continued
5 Using the View Menu
5.1 Accessing the view menu . . . . . . . . . . . . . . . . . . . . . . 43
5.2 Well performance measurements . . . . . . . . . . . . . . . . 44
Continuous mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Well test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.3 Process totalizers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.4 Inventory totalizers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.5 Active alarm log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.6 LCD options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.7 Diagnostic monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.8 Applications list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.9 Power outage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6 Continuous Mode
6.1 Continuous mode configuration . . . . . . . . . . . . . . . . . . 49
6.2 Startup and display test . . . . . . . . . . . . . . . . . . . . . . . . 49
6.3 Process monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.4 Accessing continuous mode . . . . . . . . . . . . . . . . . . . . 49
6.5 Viewing production measurements . . . . . . . . . . . . . . . 50
6.6 Quick view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.7 Pause and resume. . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.8 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
43
49
7 Well Test Mode
7.1 Well test mode configuration . . . . . . . . . . . . . . . . . . . . 55
7.2 Startup and display test . . . . . . . . . . . . . . . . . . . . . . . . 55
7.3 Process monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.4 Accessing well test mode. . . . . . . . . . . . . . . . . . . . . . . 55
7.5 Conducting a well test . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.6 Stopping and continuing a well test . . . . . . . . . . . . . . . 58
7.7 Viewing performance measurements . . . . . . . . . . . . . 60
7.8 Viewing performance measurements for the
current test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.9 Viewing previous well tests . . . . . . . . . . . . . . . . . . . . . 63
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
55
ii
ALTUS™ Net Oil Computer Manu al
Contents
continued
8 Maintenance
8.1 Alarm messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Responding to alarms . . . . . . . . . . . . . . . . . . . . . . . . 67
NOC alarm messages . . . . . . . . . . . . . . . . . . . . . . . . 68
Transmitter alarm messages. . . . . . . . . . . . . . . . . . . 68
Alarms that do not generate fault outputs . . . . . . . . . 69
Fault outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Critical status fault alarms . . . . . . . . . . . . . . . . . . . . . 74
Transmitter failure fault alarms . . . . . . . . . . . . . . . . . 74
Fault alarms requiring troubleshooting . . . . . . . . . . . 75
Active alarm log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
8.2 Customer service. . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
8.3 Setting outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Setting discrete outputs. . . . . . . . . . . . . . . . . . . . . . . 79
Setting milliamp outputs . . . . . . . . . . . . . . . . . . . . . . 79
Setting the frequency output . . . . . . . . . . . . . . . . . . . 80
8.4 Density calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Density unit for calibration. . . . . . . . . . . . . . . . . . . . . 80
Duplicating the factory calibration . . . . . . . . . . . . . . . 81
Duplicating a previous calibration . . . . . . . . . . . . . . . 82
Two-point density calibration. . . . . . . . . . . . . . . . . . . 83
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Laboratory Determination of Dry Oil and
67
Produced Water Densities
9.1 Reasons for using live oil density . . . . . . . . . . . . . . . 87
9.2 Laboratory density measurement . . . . . . . . . . . . . . . 87
Taking a sample from the flow line . . . . . . . . . . . . . . 88
Processing sample and measuring densities . . . . . . 91
. . . . . . . . . . . . . . . . .
10In-Line Determination of Live Oil and
Produced Water Densities
10.1 Reasons for using live oil density . . . . . . . . . . . . . . . 93
10.2 In-line density determination . . . . . . . . . . . . . . . . . . . 93
Density determination procedures. . . . . . . . . . . . . . . 93
Measuring and saving the water density . . . . . . . . . . 94
Manually entering the water density . . . . . . . . . . . . . 99
Measuring and saving the oil density . . . . . . . . . . . . 103
Entering the water cut . . . . . . . . . . . . . . . . . . . . . . . . 104
11Sensitivity Analysis
11.1 Error factors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
11.2 Individual sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . 107
11.3 Overall uncertainty. . . . . . . . . . . . . . . . . . . . . . . . . . . 108
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
87
93
107
ALTUS™ Net Oil Computer Manu al
iii
Contents
continued
12Software Diagrams
12.1 View menu in well test mode . . . . . . . . . . . . . . . . . . 111
12.2 View menu in continuous mode. . . . . . . . . . . . . . . . 112
12.3 Configuration menu . . . . . . . . . . . . . . . . . . . . . . . . . 113
12.4 Maintenance menu . . . . . . . . . . . . . . . . . . . . . . . . . 115
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendixes
Appendix A ALTUS™ NOC Software Configuration
Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Appendix B Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
111
123
iv
ALTUS™ Net Oil Computer Manu al
Contents
continued
Figures
Figure 1-1 Water cut calculation. . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 2-1 Typical installation, Micro Motion
NOC with 3-phase separator . . . . . . . . . . . . . . . 4
Figure 2-2 Typical installation, Micro Motion
NOC with 2-phase separator . . . . . . . . . . . . . . . 4
Figure 2-3 Sensor in horizontal pipe run,
tubes downward . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2-4 Sensor in vertical pipe run. . . . . . . . . . . . . . . . . . . . 5
Figure 3-1 Person-Process Interface . . . . . . . . . . . . . . . . . . . . 9
Figure 3-2 Pressing security button, security disabled. . . . . . . 10
Figure 3-3 Pressing security button, security enabled . . . . . . . 10
Figure 3-4 Function buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 3-5 Cursor control buttons. . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4-1 Effect of transient bubbles on density . . . . . . . . . . . 22
Figure 4-2 Holding at last measured density . . . . . . . . . . . . . . 22
Figure 4-3 Correction of density readings . . . . . . . . . . . . . . . . 22
Figure 4-4 Flow calibration values on sensor serial
number tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 4-5 D1 and D2 on sensor serial number tag . . . . . . . . . 30
Figure 4-6 K1 and K2 on sensor serial number tag . . . . . . . . . 31
Figure 4-7 K1 and K2 values from comments section . . . . . . . 32
Figure 4-8 K1 and K2 values from second page . . . . . . . . . . . 32
Figure 4-9 FD and dens temp coeff on sensor serial
number tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 5-1 Using buttons in the view menu . . . . . . . . . . . . . . . 43
Figure 6-1 Process monitor mode . . . . . . . . . . . . . . . . . . . . . . 49
Figure 7-1 Process monitor mode . . . . . . . . . . . . . . . . . . . . . . 55
Figure 8-1 Model 3500 sensor wiring terminals . . . . . . . . . . . . 76
Figure 8-2 Model 3700 sensor wiring terminals . . . . . . . . . . . . 76
Figure 9-1 Sample port for laboratory density
measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Figure 9-2 Laboratory sampling procedure using
water-filled cylinder . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 9-3 Laboratory sampling procedure using
empty cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Figure 9-4 Laboratory density measurement system,
low pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure 9-5 Laboratory density measurement system,
high pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure 10-1 Stratification with no flow. . . . . . . . . . . . . . . . . . . . . 96
Figure 10-2 Diameter and length of cylindrical vessel . . . . . . . . 97
Figure 10-3 Taking a water sample from the separator . . . . . . . 101
Figure 10-4 Using a hygrometer to measure water density . . . . 101
Figure 10-5 Taking an oil sample . . . . . . . . . . . . . . . . . . . . . . . . 103
®
sensor and
®
sensor and
ALTUS™ Net Oil Computer Manu al
v
Contents
continued
Tables
Table 4-1 Densities and deviations for continuous mode . . . . 18
Table 4-2 Well data for well test mode. . . . . . . . . . . . . . . . . . . 21
Table 4-3 Transient bubble remediation parameters. . . . . . . . 23
Table 4-4 System parameters . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 4-5 Flow variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 4-6 Density inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 4-7 Temperature inputs . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 4-8 Flow calibration values . . . . . . . . . . . . . . . . . . . . . . 29
Table 4-9 D1 and D2 density values . . . . . . . . . . . . . . . . . . . . 30
Table 4-10 K1 and K2 tube period values . . . . . . . . . . . . . . . . . 31
Table 4-11 FD and dens temp coeff values. . . . . . . . . . . . . . . . 33
Table 4-12 Nominal FD values for sensors . . . . . . . . . . . . . . . . 34
Table 4-13 Temperature calibration values . . . . . . . . . . . . . . . . 35
Table 4-14 Sensor information variables. . . . . . . . . . . . . . . . . . 35
Table 4-15 Discrete output 1 power sources. . . . . . . . . . . . . . . 36
Table 4-16 Discrete output assignment variables . . . . . . . . . . . 36
Table 4-17 Fault conditions and settings for
milliamp outputs . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 4-18 Process variables for milliamp outputs . . . . . . . . . . 38
Table 4-19 Calibration span variables . . . . . . . . . . . . . . . . . . . . 39
Table 4-20 Pulse output variables . . . . . . . . . . . . . . . . . . . . . . . 40
Table 6-1 Continuous production measurements . . . . . . . . . . 51
Table 7-1 Performance measurements for
current well test . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 7-2 Performance measurements for
previous well tests. . . . . . . . . . . . . . . . . . . . . . . . 65
Table 8-1 Using NOC alarms. . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 8-2 Using slug flow alarms. . . . . . . . . . . . . . . . . . . . . . . 69
Table 8-3 Using output saturation alarms . . . . . . . . . . . . . . . . 70
Table 8-4 Using totalizer alarms . . . . . . . . . . . . . . . . . . . . . . . 70
Table 8-5 Using calibration and trim alarms . . . . . . . . . . . . . . 71
Table 8-6 Using conditional status alarms. . . . . . . . . . . . . . . . 72
Table 8-7 Fault output levels . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 8-8 Configurations for fault outputs . . . . . . . . . . . . . . . . 73
Table 8-9 Using critical status fault alarms . . . . . . . . . . . . . . . 74
Table 8-10 Using transmitter failure fault alarms. . . . . . . . . . . . 74
Table 8-11 Troubleshooting excessive drive gain . . . . . . . . . . . 75
Table 8-12 Nominal resistance ranges for
flowmeter circuits. . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 8-13 Troubleshooting sensor error fault alarms. . . . . . . . 77
Table 8-14 Density of air in grams per cubic centimeter . . . . . . 84
Table 8-15 Maximum flow rates for high-density
calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 8-16 Density of water. . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Table 9-1 Laboratory equipment for determining live oil
and produced water densities . . . . . . . . . . . . . . 87
Table 10-1 Approximate capacity of cylindrical vessels. . . . . . 97
Table 10-2 Approximate capacity of spherical ends . . . . . . . . 97
Table 11-1 Uncertainty factors for percent water cut and
percent net oil . . . . . . . . . . . . . . . . . . . . . . . . . . 107
vi
ALTUS™ Net Oil Computer Manu al
1 Before You Begin
Water cut
D
eDo
–
DwD
o
–
-------------------- -=
1.1 About this manual
1.2 Application software
described in this manual
1.3 Introduction to the ALTUS™
NOC
Replacing an older NOC
and transmitter
This manual explains how to configure, operate, and maintain the
ALTUS
™
Net Oil Computer (NOC). This manual does not explain
installation or wiring. For information about installation and wiring, see
ALTUS Installation Manual
the
.
This manual pertains to software menus that enable operation,
configuration, and maintenance of the NOC.
• The ALTUS applications platform has software functions that do not
pertain to the NOC.
• For information about software functions that are not described in
this manual, refer to the installation and detailed setup manuals for
the applications platform.
The ALTUS NOC works with a Micro Motion® sensor to produce realtime measurements of water cut, net oil volume flow, and net water
volume flow. The NOC measures full-stream mass flow and volumetric
flow at rates from a few barrels to more than 100,000 barrels per day.
If an AL TUS NOC is installed as a replacement for an older Micro Motion
Net Oil Computer and RFT9739 or RFT9712 transmitter, power-supply
and output wiring does not need to be replaced. Because transmitter
software is included with the ALTUS NOC, a transmitter is not required.
Using the Person-Process
Interface
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
Water cut determination
ALTUS™ Net Oil Computer Manu al
The NOC calculates water cut from the following equation:
Where
:
D
= Emulsion density
e
D
= Oil density
o
D
= Water density
w
Figure 1-1
, page 2, shows how water cut is calculated by the NOC. The
operator enters the oil and water densities at the reference temperature
(60°F in
temperature (100°F in
Figure 1-1
). The Micro Motion sensor measures the fluid
Figure 1-1
). The NOC extrapolates the densities
to the operating temperature, using an API equation for oil and a
Chevron Research equation for produced water. The water cut equation
is solved at operating temperature, then referenced back to 60°F. Using
water cut, mass flow rate, and net oil and water densities, the NOC
calculates net oil, net water, and gross flow at reference temperature.
1
continued
Before You Begin
Figure 1-1. Water cut calculation
1.05
1.00
0.95
0.90
0.85
0.80
Density (g/cc)
0.75
0.70
Produced water density enter ed in NOC
Crude oil density ent er ed i n N O C
60° 90°
NOC capabilities
Produced water density
D
–
Water cut
100°
Temperature (°F)
eDo
-------------------- -=
DwD
–
o
120° 150°
Crude oil density
The NOC can operate in continuous mode or well test mode:
• In continuous mode, the NOC can continuously monitor a well,
separator, or pipeline.
• In well test mode, the NOC can perform a well test on any of up to 48
different wells. Well performance data for the test that is in progress
or for previous tests can be viewed during the test.
The NOC nonvolatile memory archives data acquired during the last
three well tests. The NOC resumes testing if a power failure or shutoff
interrupts the test that is in progress. The last three power outages are
recorded with power-on and power-off time/date stamps.
The NOC has three discrete outputs, two milliamp outputs, and a pulse
output:
• Discrete output 1 can be an alarm for transient bubble remediation.
• Discrete output 2 indicates net oil. It produces 10 output pulses per
barrel or 10 output pulses per cubic meter of net oil.
• Discrete output 3 indicates net water. It produces 10 output pulses
per barrel or 10 output pulses per cubic meter of net water.
• Milliamp output 1 can indicate any measured variable.
• Milliamp output 2 can indicate any measured variable.
• The pulse output can represent a flow variable.
The NOC can remediate density readings to compensate for the
presence of transient bubbles in the sensor. If erratic density resulting
from transient bubbles causes sensor drive gain to exceed the
programmed value, the NOC can be programmed to respond in one of
three ways:
• The NOC can hold the density value that was measured at a
specified time before transient bubbles were detected.
• The NOC can produce an alarm indicating the presence of transient
bubbles. The alarm can be assigned to discrete output 1.
• The NOC can stop the well test that is in progress.
2
ALTUS™ Net Oil Computer Manu al
2 Installation Considerations
2.1 Piping arrangement and
ancillary equipment
Figure 2-1
when a 3-phase test separator is used.
Figure 2-2
when a 2-phase test separator is used.
Adhere to the following general guidelines:
• Design and size the test separator to ensure complete separation of
the entrained gas from the liquid phase.
• Size the Coriolis sensor so that at maximum liquid flow, pressure
drop is less than 3 psi.
• Install the sensor as far below the test separator as possible.
Install the sensor upstream from the dump valve
•
• Balance any sensor pressure drop with hydrostatic head, measured
from the lowest level in the separator down to the sensor inlet. Rule
of thumb: pressure drop should be about 0.4 psi per foot.
• If the liquid temperature is significantly different from the ambient
temperature, thermally insulate or heat trace the sensor and
upstream pipe to minimize paraffin coating and transient temperature
at the start of dumping periods.
• Install a meter proving loop, if required.
• Install a static mixer and sampling port for calibration and verification
purposes. Locate the static mixer and sampling port downstream
from the sensor and the proving loop connections.
• Make sure the dump valve is capable of regulating back pressure
and controlling the liquid flow rate.
, page 4, shows a typical installation of a sensor and an NOC
, page 4, shows a typical installation of a sensor and an NOC
.
Using the Person-Process
Interface
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
ALTUS™ Net Oil Computer Manu al
3
continued
Installation Considerations
Figure 2-1. Typical installation, Micro Motion® sensor and NOC with 3-phase separator
Figure 2-2. Typical installation, Micro Motion
®
sensor and NOC with 2-phase separator
4
ALTUS™ Net Oil Computer Manu al
Installation Considerations
continued
2.2 Sensor installation
Sensor orientation
Install the sensor according to the appropriate sensor instruction
manual.
If possible, mount the sensor with its flow tubes downward in a
horizontal pipe run, as shown in
Figure 2-3
.
If necessary to prevent sand or other solid particles from accumulating
in the flow tubes, or to accommodate existing vertical piping, mount the
sensor in a vertical pipe run, as shown in
Figure 2-4
. The oil/water
interface should flow upward through the pipeline.
Figure 2-3. Sensor in horizontal pipe run, tubes downward
Flow direction
Using the Person-Process
Interface
Figure 2-4. Sensor in vertical pipe run
Flow direction
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
ALTUS™ Net Oil Computer Manu al
5
Installation Considerations
PgPpP
m
+
>
Avoiding inaccurate flow
counts
continued
CAUTION
Settling of the oil/water interface in a sensor can
cause the flowmeter to indicate flow when there is no
flow.
• To avoid inaccurate flow counts, program a low flow
cutoff. To program a low flow cutoff, see page 25.
• Settling of the oil/water interface is more likely to occur if
the sensor is mounted in a vertical pipe run than if the
sensor is mounted in a horizontal pipe run.
Because the crude oil in the separator is at an equilibrium condition, any
pressure reduction can cause the solution gas (i.e., the light end
components) to break out from the saturated crude oil.
Even a seemingly small amount of free gas in the liquid phase can result
in substantial measurement errors in water cut and net oil. (See pages
107-109 to estimate the effect of free gas).
The amount of gas that is produced varies, and depends on the
properties of the crude oil and the operating conditions.
To prevent formation of solution gas in the flowmeter, the following
criterio n shou ld be followed:
Where:
Pg= Static head pressure of liquid, measured from liquid level at
separator to sensor inlet
P
= Frictional pressure loss of flow line, from test separator to
p
sensor inlet
P
= Pressure drop across sensor
m
Detailed pressure drop calculations are strongly recommended during
design and installation of the piping system.
6
ALTUS™ Net Oil Computer Manu al
Installation Considerations
continued
The following general guidelines are suggested:
• To maximize the static head gain (P
), install the sensor as far below
g
the test separator as possible.
• Note that 1 psi (6.9 kPa) of static head gain results from 28 inches of
water column.
• To minimize the frictional head loss (P
), install the sensor as near as
p
possible to the test separator, and use larger-diameter connecting
pipes. Minimize use of piping elements such as tees, elbows, and
reducing unions.
• Install sampling ports, static mixer , proving connections, dump valve ,
back pressure regulator, or other flow-restricting devices downstream
from the sensor. A full-port valve should be considered if a cutoff
valve must be installed between the separator and the sensor.
• Whenever possible, frictional pressure loss should be less than 3 psi
(20.7 kPa) at the maximum anticipated flow rate.
• To minimize pressure drop across the sensor (P
), install a larger
m
sensor. Pressure drop across the sensor should be less than 3 psi
(20.7 kPa) at the maximum anticipated flow rate.
• In some environments, extremely tight emulsion occurs. Extremely
tight emulsion can make removal of entrained gas difficult, even with
a large separator. Using a suitable demulsifier chemical to break
down the emulsion is a possible method of alleviating this problem.
Using the Person-Process
Interface
2.3 Flow direction
If the sensor is installed directly at the wellhead, (i.e., if a test separator
is not used), the line pressure at the sensor should be maintained above
the crude oil bubble point pressure.
The sensor measures accurately regardless of flow direction. The arrow
on the sensor housing indicates normal forward flow direction. Refe r to
ALTUS Detailed Setup Manual
the
for directions about setting the NOC
to indicate forward flow, reverse flow, or forward and reverse flow.
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
ALTUS™ Net Oil Computer Manu al
7
8
ALTUS™ Net Oil Computer Manu al
3 Using the Person-Process
Interface
3.1 Person-Process Interface
Figure 3-1. Person-Process Interface
Volume Flow
Backlit
display
Volume Total
NEXT PRINT VIEW
Figure 3-1
• Configure the NOC
• Monitor and control the application
• Perform maintenance and diagnostic tasks
DEVICE 1
shows the Person-Process Interface. Use the interface to:
4,352.33
bpd
56,485.88
bbl
Using the Person-Process
Interface
Cursor control
buttons
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
Function buttons
ALTUS™ Net Oil Computer Manu al
Security button
9
Using the Person-Process Interface
continued
3.2 Security button
The security button is in the lower right of the interface, marked by an
icon of a padlock.
• If security is disabled, press the security button to access the main
menu. See
• If security has been enabled, you will be prompted to enter a
password. See
• To enable security, see the
You can use the security button to return to the main menu or password
entry screen. Press the security button once to return to:
• The main menu, shown in
• The password entry screen, shown in
enabled
At the main menu or password entry screen, press EXIT to return to the
operation screen.
Figure 3-2
Figure 3-2. Pressing security button, security disabled
DEVICE 1
Volume Flow
4,532.33
bpd
Mass Total
56,485.88
bbl
NEXT PRINT VIEW
.
Figure 3-3
.
ALTUS Detailed Setup Manual
Figure 3-2
DEVICE 1
Configuration
Maintenance
Security
Language
SEL HELP EXIT
, if security is disabled
Figure 3-3
, if security is
.
Figure 3-3. Pressing security button, security enabled
DEVICE 1
Volume Flow
4,532.33
bpd
Mass Total
56,485.88
bbl
NEXT PRINT VIEW
10
Enter Password
SEL HELP EXIT
ALTUS™ Net Oil Computer Manu al
Using the Person-Process Interface
continued
3.3 Function buttons
Figure 3-4. Function buttons
The pushbuttons below the display are the function buttons. The action
each button performs appears on the display just above the button.
Figure 3-4
reviews the functions that are assigned to each button.
DEVICE 1
Configuration
Maintenance
Security
SEL HELP EXIT
Using the Person-Process
Interface
START • Start well test
• Start averaging oil or water densities
STOP • Stop well test
• S t op averaging oil or water densities
CLEAR Clear all displayed values
RESET Reset total
PAUSE • Pause counting of all displayed totals
• Pause performance measurements
RESUME • R esume counting of all displ ayed totals
• R esume production meas ur em ents
SEL Select the highlighted option
CHG Make a change to the highlighted option
SAVE Save a change
ENTER Enter a password
YES Proceed with action
OK Proceed with action
NEXT • Scroll to next screen
• At the last screen, scroll to the first screen
• Test the next well in the sequence
RETURN Retu rn to well test screen
PGDN Page down to next help screen
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
VIEW Access the view menu
ACK Acknowledge an alarm message
EXIT Return to the previous screen
NO Cancel action
HELP Show a help screen
RESET Reset total
START Start a new well test
VIEW View performance meas urements for a
well that is being tested
PRINT Send a ticket to a printer
PGUP Page up to previous help screen
ALTUS™ Net Oil Computer Manu al
11
Using the Person-Process Interface
continued
3.4 Cursor control buttons
Actions performed by the function buttons apply to the item at the cursor.
Figure 3-5
, page 13, shows a typical configuration sequence involving
both a menu item and a variable edit item. Pressing HELP produces a
screen that has help for the item at the cursor.
Menus
Each menu includes a list of items.
• The cursor is a reverse-video highlight bar.
• Use the up or down arrow buttons to locate the cursor at the menu
item you want to select or change.
• After locating the cursor at the desired menu item, press CHG or the
right cursor button to select the item.
Items
After a menu item has been selected, the cursor enables you to enter or
change the selected item:
• The cursor is an underscore character, which is located under a
character.
• If the item has a value of Yes or No, all arrows toggle between the
two choices. Otherwise, press the up and down arrow buttons to
increase or decrease the value of the character at the cursor.
• If the item has more than one digit or character (like the oil density in
the example), press the left and right arrow buttons to move the
cursor to the next or previous character.
• When the value is correct, press SAVE.
• If y ou wish to cancel the change, press EXIT. The interface returns to
the previous screen without saving the changes.
12
ALTUS™ Net Oil Computer Manu al
Using the Person-Process Interface
Figure 3-5. Cursor control buttons
continued
Menu
Indicates items
available to scroll
Cursor is a
highlight bar
Item
Cursor is an
underscore
Well Data-Densities
Oil Density
Water Density
Oil Deviation
Water Deviation
CHG HELP EXIT
Well Data-Densities
Oil Density
Water Density
Oil Deviation
Water Deviation
SAVE EXIT
0.9000 g/cc
1.1000 g/cc
0.0005 g/cc
0.0005 g/cc
0.9000
g/cc
1.1000 g/cc
0.0005 g/cc
0.0005 g/cc
EXIT
↓
Move cursor to left or toggle YES/NO
↓
Move cursor up/Scroll up
SELECT
Move cursor down/Scroll down
Increase value at cursor
or toggle YES/NO
Move cursor to right
or toggle YES/NO
Decrease value at cursor
or toggle YES/NO
Using the Person-Process
Interface
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
ALTUS™ Net Oil Computer Manu al
13
14
ALTUS™ Net Oil Computer Manu al
4 Configuration
4.1 Recording the
configuration
4.2 Configuration sequence
While you are configuring the NOC, record configuration parameters in
the NOC configuration record (
Failure to perform configuration tasks in the proper sequence could
result in an incomplete or flawed configuration. Perform configuration
tasks in the following sequence:
1. Configure well performance measurements.
2. Configure system data.
3. Configure inputs.
4. Configure outputs.
Appendix A
).
CAUTION
Selecting configuration will interrupt measurement
and control functions. All outputs will go to their
configured fault settings.
Set control devices for manual operation before accessing
configuration menus.
Step 1
Configure well performance measurements
Using the Person-Process
Interface
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
ALTUS™ Net Oil Computer Manu al
Well performance measurements include the following parameters:
• Mode of operation
• Units of measurement
• Well data – densities
• Compensations
15
Configuration
Mode of operation
Configuration
Well performance meas
continued
Mode of operation
CAUTION
Changing the mode of operation will erase all
stored test data.
Mode of Operation
Continuous Mode
Well Test Mode
SAVE EXIT
Units of measurement
To avoid erasing test data, d o not chan ge the mo de of
operation during a well test.
To set the mode of operation:
a. Press the security button on the display face.
b. Select Configuration.
c. Select Well Performance Meas.
d. Select Mode of Operation.
e. Select Continuous Mode or Well Test mode, then
press SAVE.
The units of measurement menu allows you to select
a reference temperature for measuring net oil and net
water.
To select a unit of temperature, see page 27.
To select a unit of volume flow, see page 25.
CAUTION
Changing reference temperature changes the
indicated standard volumes and reference
densities.
If the reference temperature is changed, change oil
and water reference density values.
16
ALTUS™ Net Oil Computer Manu al
Configuration
Configuration
Well performance meas
Units of Measurement
60 degF
15 degC
20 degC
continued
Units of measurement
To select the reference temperature:
a. Press the security button on the display face.
b. Select Configuration.
c. Select Well Performance Meas.
d. Select Units of Measurement.
e. Select the desired refer ence temperature, then
press SAVE.
The reference temperature that is currently being
used is always the one that is highlighted.
SAVE EXIT
Well data-densities
Configuration
Well performance meas
Well data-densities
Well Data-Densities
Oil Density
0.9000 g/cc
Water Density
1.1000 g/cc
Oil Deviation
0.0005 g/cc
Water Deviation
0.0005 g/cc
CHG HELP EXIT
Using the Person-Process
Interface
Continuous mode
To enter oil and water densities and deviations for
continuous mode:
a. Press the security button on the display face.
b. Select Configuration.
c. Select Well Performance Meas.
d. Select Well Data-Densities.
↓
e. Use the function buttons and the cursor control
buttons to configure the parameters that are listed
Table 4-1
in
, page 18.
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
ALTUS™ Net Oil Computer Manu al
17
Configuration
continued
Oil and water densities, deviations, and duration
averages are described in the chapter that explains
density determination (pages 93-104
).
Well Data-Densities
Oil Deviation
0.0005 g/cc
Water Deviation
0.0005 g/cc
Oil Duration Ave
Water Duration Ave
CHG HELP EXIT
↑
5 sec
5 sec
Table 4-1. Densities and deviations for continuous mode
Variable Default Description
Oil density 0.9000 g/cc • I f oil density at reference temperature is known, enter the densi ty value
Water density 1.1000 g/cc • If water density at reference temperature is known , e nt e r the density value
Oil deviation 0.0005 g/cc • E nter the maximum oil density deviation that wi ll be allowed du ring density
Water deviation 0.0005 g/cc • Enter the maximum water density deviation that will be allowed during density
Oil density ave 5 sec Enter the amount of time during which oil density will be averaged during density
Water density ave 5 sec Enter the amount of time during which water density will be averaged during
• If oil density at reference tempe rature is unk nown, perform a density
determina tio n (see pages 93-104)
• If water density at reference temperature is unknown, perform a density
determina tio n (see pages 93-104)
determina tio n (see pages 93-104)
• I f t he dif ference bet wee n t wo co nsecutive density readings i s grea te r t han the
programmed deviation, the densit y average is restarted. The averaging is
completed when the deviation is not exceeded during the averaging period
determina tio n (see pages 93-104)
• I f t he dif ference bet wee n t wo co nsecutive density readings i s grea te r t han the
programmed deviation, the densit y average is restarted. The averaging is
completed when the deviation is not exceeded during the averaging period
determina tio n (see pages 93-104)
density determ i nation (see pages 93 -104)
18
ALTUS™ Net Oil Computer Manu al
Configuration
Configuration
Well performance meas
Well Data-Densities
Wells 1 to 12
Wells 13 to 24
Wells 25 to 36
Wells 37 to 48
continued
Well data-densities
Well test mode
To enter well names, oil and water densities,
deviations, and purge times for well test mode:
a. Press the security button on the display face.
b. Select Configuration.
c. Select Well Performance Meas.
d. Select Well Data-Densities.
e. Select the menu item for the number of the well
that will be configured, then press CHG.
CHG HELP EXIT
Wells 1 to 12
01: Tinsley 22-14b
02: N Cowden 24-17a
03: R Dutton 36-13c
04: B Olsen 23-15d
05: 13-24-44-5E6
06: 08-11-23-6E2
07: 18-44-04-3W5
08: 12-28-36-6W7
SAVE EXIT
Using the Person-Process
Interface
f. Select the well that will be configured, then press
SAVE.
↓
Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations
ALTUS™ Net Oil Computer Manu al
19
Configuration
Well Name:
Oil Density
Water Density
Purge Time
CHG HELP EXIT
continued
Well #1
Tinsley 22-14b
0.8000 g/cc
1.0000 g/cc
30 minutes
g. To enter a well name:
• Begin entering characters at the far left
position
• Enter up to 18 alphanumeric characters,
↓
including spaces
h. Use the function buttons and the cursor control
buttons to configure the parameters that are listed
Table 4-2
in
.
Oil and water densities, deviations, and duration
averages are described in the chapter that explains
density determination (pages 93-104
).
Well #1
Oil Deviation
0.0005 g/cc
Water Deviation
0.0005 g/cc
Oil Duration Ave
5 sec
Water Duration Ave
5 sec
CHG HELP EXIT
↑
20
ALTUS™ Net Oil Computer Manu al
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