Micro Motion 3000 9 wire Net Oil Computer Owner's manual

Brand: Micro Motion

Model: 3000 9 wire Net Oil Computer

Category: Measuring, testing & control

Type: Owner's manual

ALTUS

™

Net Oil Computer Manual

May 2000

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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

Micro Motion, ELITE, and BASIS are registered trademarks, and ALTUS is a

trademark of Micro Motion, Inc., Boulder, Colorado. Hastelloy is a registered

trademark of Haynes International, Inc., Kokomo Indiana. Inconel is a registered

trademark of Inco Alloys International, Inc., Huntington, West Virginia. Teflon is a

registered trademark of E.I. DuPont de Nemours Co., Inc., Wilmington, Delaware.

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ALTUS

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Net Oil Computer Manual

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

™

NOC . . . . . . . . . . . . . . . . 1

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

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

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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

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

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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

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

107

11.1 Error factors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

11.2 Individual sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . 107

11.3 Overall uncertainty. . . . . . . . . . . . . . . . . . . . . . . . . . . 108

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Contents

continued

12Software Diagrams

. . . . . . . . . . . . . . . . . . . . . . . . . . .

111

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

123

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Contents

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Figures

Figure 1-1 Water cut calculation. . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 2-1 Typical installation, Micro Motion

sensor and

NOC with 3-phase separator . . . . . . . . . . . . . . . 4

Figure 2-2 Typical installation, Micro Motion

sensor and

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

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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

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Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations

Using the Person-Process

Interface

1 Before You Begin

1.1 About this manual

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

the

ALTUS Installation Manual

1.2 Application software

described in this manual

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.

1.3 Introduction to the ALTUS

™

NOC

The ALTUS NOC works with a Micro Motion

sensor to produce real-

time 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.

Replacing an older NOC

and transmitter

If an ALTUS 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.

Water cut determination

The NOC calculates water cut from the following equation:

Where

= Emulsion density

= Oil density

= Water density

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

Figure 1-1

). The Micro Motion sensor measures the fluid

temperature (100°F in

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.

Water cut

–

---------------------=

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Before You Begin

continued

Figure 1-1. Water cut calculation

NOC capabilities

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.

Water cut

–

---------------------=

Produced water density

Crude oil density

Temperature (°F)

60° 90°

100°

120° 150°

1.05

1.00

0.95

0.90

0.85

0.80

0.75

0.70

Density (g/cc)

Produced water density entered in NOC

Crude oil density entered in NOC

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Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations

Using the Person-Process

Interface

2 Installation Considerations

2.1 Piping arrangement and

ancillary equipment

Figure 2-1

, page 4, shows a typical installation of a sensor and an NOC

when a 3-phase test separator is used.

Figure 2-2

, page 4, shows a typical installation of a sensor and an NOC

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.

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Installation Considerations

continued

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

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Installation Considerations

continued

Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations

Using the Person-Process

Interface

2.2 Sensor installation

Install the sensor according to the appropriate sensor instruction

manual.

Sensor orientation

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

Figure 2-4. Sensor in vertical pipe run

Flow direction

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Installation Considerations

continued

Avoiding inaccurate flow

counts

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

criterion should be followed:

Where:

= Static head pressure of liquid, measured from liquid level at

separator to sensor inlet

= Frictional pressure loss of flow line, from test separator to

sensor inlet

= Pressure drop across sensor

Detailed pressure drop calculations are strongly recommended during

design and installation of the piping system.

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.

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Installation Considerations

continued

Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations

Using the Person-Process

Interface

The following general guidelines are suggested:

• To maximize the static head gain (P

), install the sensor as far below

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

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

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.

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.

2.3 Flow direction

The sensor measures accurately regardless of flow direction. The arrow

on the sensor housing indicates normal forward flow direction. Refer to

the

ALTUS Detailed Setup Manual

for directions about setting the NOC

to indicate forward flow, reverse flow, or forward and reverse flow.

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Configuration Using the View Menu Continuous ModeBefore You Begin Installation Considerations

Using the Person-Process

Interface

3 Using the Person-Process

Interface

3.1 Person-Process Interface

Figure 3-1

shows the Person-Process Interface. Use the interface to:

• Configure the NOC

• Monitor and control the application

• Perform maintenance and diagnostic tasks

Figure 3-1. Person-Process Interface

Cursor control

buttons

Security button

Backlit

display

Function buttons

DEVICE 1

Volume Flow

4,352.33

bpd

Volume Total

56,485.88

bbl

NEXT PRINT VIEW

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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

Figure 3-2

• If security has been enabled, you will be prompted to enter a

password. See

Figure 3-3

• To enable security, see the

ALTUS Detailed Setup Manual

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

Figure 3-2

, if security is disabled

• The password entry screen, shown in

Figure 3-3

, if security is

enabled

At the main menu or password entry screen, press EXIT to return to the

operation screen.

Figure 3-2. Pressing security button, security disabled

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

DEVICE 1

Configuration

Maintenance

Security

Language

SEL HELP EXIT

DEVICE 1

Volume Flow

4,532.33

bpd

Mass Total

56,485.88

bbl

NEXT PRINT VIEW

Enter Password

SEL HELP EXIT

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Micro Motion 3000 9 wire Net Oil Computer Owner's manual

Brand: Micro Motion

Model: 3000 9 wire Net Oil Computer

Category: Measuring, testing & control

Type: Owner's manual

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Micro Motion 3000 9 wire Net Oil Computer Owner's manual

Micro Motion 3000 9 wire Net Oil Computer Owner's manual

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