Directive 017: Measurement Requirements for Oil and Gas ...

Directive 017

Release date: March 17, 2022 Effective date: March 17, 2022 Replaces previous edition issued May 12, 2020

Measurement Requirements for Oil and Gas Operations

Contents

Introduction......... ......................................................................................................................................... 1 Purpose of This Directive ....................................................................................................................... 1 What's New in This Edition? ................................................................................................................... 1 Intent ...................................................................................................................................................... 1 Definitions ............................................................................................................................................... 2

1 Standards of Accuracy ........................................................................................................................ 1-1 1.1 Introduction ............................................................................................................................. 1-1 1.2 Applicability and Use of Uncertainties ....................................................................................1-1 1.3 Maximum Uncertainty of Monthly Volume..............................................................................1-2 1.4 Single Point Measurement Uncertainty .................................................................................. 1-3 1.5 Confidence Level .................................................................................................................... 1-3 1.6 Determination of Uncertainties ............................................................................................... 1-3 1.6.1 Example Calculation............................................................................................... 1-4 1.7 Explanation of Standards of Accuracy ...................................................................................1-4 1.7.1 Oil Systems ............................................................................................................ 1-4 1.7.2 Gas Systems ........................................................................................................1-12 1.7.3 Injection/Disposal Systems ..................................................................................1-26 1.8 Standards of Accuracy ? Summary ......................................................................................1-29 1.8.1 Oil Systems ..........................................................................................................1-29 1.8.2 Gas Systems ........................................................................................................1-29 1.8.3 Injection Systems .................................................................................................1-30 1.9 Measurement Schematics ....................................................................................................1-30 Definitions .............................................................................................................................1-31 1.9.1 Measurement Schematic Requirements ..............................................................1-32

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1.9.2 Schematic Updates ..............................................................................................1-34 1.9.3 Implementation.....................................................................................................1-35 1.9.4 Schematic Availability...........................................................................................1-35 1.10 Facility Delineation Requirements ........................................................................................1-35 2 Calibration and Proving .......................................................................................................................2-1 2.1 Definitions ............................................................................................................................... 2-1 2.2 Applicability.............................................................................................................................2-2 2.3 Frequency ............................................................................................................................... 2-2 2.4 Accuracy of Provers and Calibration Instruments ..................................................................2-3 2.5 Gas Meters ............................................................................................................................. 2-4 2.5.1 General Calibration Requirements.........................................................................2-4 2.5.2 Gas Meter Internal Inspection ................................................................................2-5 2.5.3 Orifice Meters ......................................................................................................... 2-9 2.5.4 Electronic Flow Measurement Calibration..............................................................2-9 2.6 Liquid Meters ........................................................................................................................2-12 2.7 Oil Meters .............................................................................................................................2-18 2.7.1 Live Oil Meters .....................................................................................................2-18 2.7.2 Dead Oil Meters ...................................................................................................2-21 2.8 Condensate Meters ..............................................................................................................2-21 2.8.1 Condensate at Equilibrium Conditions .................................................................2-21 2.8.2 Condensate at Flow-line Conditions ....................................................................2-21 2.9 Other Liquid Hydrocarbon Meters ........................................................................................2-22 2.10 Water Meters ........................................................................................................................2-22 2.11 Product Analyzers ................................................................................................................2-23 2.12 Automatic Tank Gauges .......................................................................................................2-23 2.12.1 Inventory Management.........................................................................................2-23 2.12.2 Delivery Point Measurement ................................................................................2-24 2.13 Using Tank Gauging for Oil Measurement ...........................................................................2-24 2.13.1 Inventory Measurement........................................................................................2-24 2.13.2 Delivery Point Measurement ................................................................................2-25 2.14 Weigh Scales........................................................................................................................2-25 Exceptions ............................................................................................................................2-26 3 Proration Factors, Allocation Factors, and Metering Difference..........................................................3-1 3.1 Proration Factors and Allocation Factors ...............................................................................3-1 3.1.1 Description ............................................................................................................. 3-1 3.1.2 Target Factors ........................................................................................................ 3-3 3.1.3 Exception................................................................................................................3-4 3.1.4 Acceptable Proration Factors and Allocation Factor Ranges ................................3-4

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3.2 Metering Difference ................................................................................................................3-5 3.2.1 Description ............................................................................................................. 3-5 3.2.2 Target Metering Difference ....................................................................................3-6

4 Gas Measurement ............................................................................................................................... 4-1 4.1 General Requirements ........................................................................................................... 4-1 4.2 Gas Measurement and Accounting Requirements for Various Battery/Facility Types ..........4-1 4.2.1 Oil/Bitumen Batteries..............................................................................................4-1 4.2.2 Gas Batteries/Facilities........................................................................................... 4-2 4.3 Base Requirements for Gas Measurement ..........................................................................4-11 4.3.1 System Design and Installation of Measurement Devices...................................4-11 4.3.2 Volumetric Calculations........................................................................................4-16 4.3.3 Production Data Verification, Audit Trail, and Volumetric Data Amendments .....4-19 4.3.4 Operations ? Base Requirements for Acceptable Gas Measurement and Reading of Gas Charts.........................................................................................4-24 4.3.5 Exceptions ............................................................................................................4-29 4.3.6 Electronic Flow Measurement (EFM) for Gas ......................................................4-36 4.3.7 Vent Gas Measurement Requirements................................................................4-50 4.4 References ...........................................................................................................................4-51

5 Site-Specific Deviation from Base Requirements................................................................................5-1 Specialized Terminology Defined ........................................................................................................5-1 5.1 Site-Specific Examples ........................................................................................................... 5-1 5.2 Site-Specific Approval Applications ........................................................................................ 5-2 5.3 Chart Cycles Extended Beyond the Required Time Period ...................................................5-3 5.3.1 Exceptions .............................................................................................................. 5-3 5.3.2 Applications ............................................................................................................ 5-5 5.3.3 Considerations of Site-specific Approvals..............................................................5-6 5.4 Gas Proration Outside Southeastern Alberta Shallow Gas Zones/Area ................................5-6 5.4.1 Exceptions .............................................................................................................. 5-6 5.4.2 Applications ............................................................................................................ 5-8 5.4.3 Considerations for Site-Specific Approval..............................................................5-9 5.5 Measurement by Difference ...................................................................................................5-9 5.5.1 Gas MbD ................................................................................................................ 5-9 5.5.2 Oil MbD ................................................................................................................5-17 5.5.3 Exceptions ............................................................................................................5-19 5.5.4 Applications ..........................................................................................................5-26 5.5.5 Considerations for Site-Specific Approval............................................................5-26 5.5.6 Fuel Gas MbD ......................................................................................................5-28 5.6 Surface Commingling of Multiple Gas Zones/Wells .............................................................5-29

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5.6.1 Exceptions ............................................................................................................5-30 5.6.2 Applications ..........................................................................................................5-32 5.6.3 Considerations for Site-specific Approval ............................................................5-33 5.7 Gas Effluent Wells Exemption and Reduction for Testing Frequency .................................5-33 6 Conventional Oil Measurement ........................................................................................................... 6-1 6.1 General Requirements ........................................................................................................... 6-1 6.2 General Measurement, Accounting, and Reporting Requirements for Various Battery Types ...................................................................................................................................... 6-1 6.2.1 General Accounting Formula .................................................................................6-1 6.2.2 Oil Batteries ............................................................................................................ 6-1 6.2.3 Gas Batteries Producing Oil...................................................................................6-3 6.3 Base Requirements for Oil Measurement ..............................................................................6-4 6.3.1 System Design and Installation of Measurement Devices.....................................6-4 6.3.2 Volumetric Calculations..........................................................................................6-4 6.3.3 Production Data Verification and Audit Trail ..........................................................6-5 6.3.4 Volumetric Data Amendments ............................................................................... 6-6 6.4 Field Operations ..................................................................................................................... 6-8 6.4.1 Production Hours....................................................................................................6-8 6.4.2 Fluid Sampling Requirements for S&W Determination (and Density) ...................6-8 6.4.3 S&W Analysis ......................................................................................................... 6-8 6.4.4 Proration Well Testing ............................................................................................ 6-8 6.5 Oil Proration Battery Accounting and Reporting Requirements ...........................................6-10 6.5.1 Proration Estimated Volume Calculation..............................................................6-12 6.5.2 Calculate Proration Factors and Monthly Production...........................................6-14 6.6 Condensate Receipts at an Oil Battery ................................................................................6-14 6.7 Combined (Cascade Testing)...............................................................................................6-15 6.8 EFM for Oil Systems.............................................................................................................6-16 6.9 Reporting Requirements and Scenarios Based on Alberta Energy Royalty Regimes for Wells Producing Oil .........................................................................................................6-16 6.9.1 AER Classification ? Oil Wells .............................................................................6-16 6.9.2 AER Classification ? Gas Well Producing Oil ......................................................6-19 7 Gas Proration Batteries .......................................................................................................................7-1 7.1 General Requirements ........................................................................................................... 7-1 7.1.1 Group Measurement .............................................................................................. 7-2 7.1.2 Stabilized Flow and Representative Flow ..............................................................7-3 7.2 Gas Multiwell Proration SE Alberta Batteries .........................................................................7-3 7.2.1 Group Measurement .............................................................................................. 7-4 7.2.2 Size of a SE Alberta Multiwell Gas Proration Battery ............................................7-4

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7.2.3 Testing Requirements ............................................................................................ 7-4 7.2.4 Production Accounting and Reporting Requirements ............................................7-5 7.3 Gas Multiwell Proration Outside SE Alberta Batteries............................................................7-6 7.3.1 Well Testing Requirements ....................................................................................7-7 7.3.2 Production Volume Calculations ............................................................................7-9 7.3.3 Exception..............................................................................................................7-11 7.4 Gas Multiwell Effluent Measurement Proration Batteries.....................................................7-13 7.4.1 Well Testing..........................................................................................................7-15 7.4.2 Production Volume Calculations ..........................................................................7-23 7.4.3 Sampling and Analysis Requirements .................................................................7-27 7.4.4 Exception..............................................................................................................7-28 7.5 Well Effluent Measurement in the Duvernay and Montney Plays ........................................7-29 7.5.1 Qualifying Criteria.................................................................................................7-30 7.5.2 Measurement System Requirements...................................................................7-31 7.5.3 Operational Scenario 1 ? Hydrocarbon Liquids are Recombined into the

Gathering System.................................................................................................7-33 7.5.4 Operational Scenario 2 ? Hydrocarbon Liquids are Delivered to Sales at the

Battery ..................................................................................................................7-37 7.5.5 Exception for the Number of Test Separators That May be Used During

Post-Fracturing Well Flow Back, Cleanup, and Flow Testing ..............................7-40 8 Gas Liquid Sampling and Analysis ...................................................................................................... 8-1

8.1 General ................................................................................................................................... 8-1 8.2 Sampling Requirements ......................................................................................................... 8-2

8.2.1 Sample Point and Probes ...................................................................................... 8-3 8.2.2 H2S Sampling and Analysis....................................................................................8-5 8.2.3 Compositional Analysis of Natural Gas..................................................................8-7 8.3 Gas Equivalent Factor Determination from Condensate........................................................8-8 8.3.1 Calculated Compositional Analyses.......................................................................8-8 8.4 Sampling and Analysis Frequency .......................................................................................8-10 8.4.1 Alberta Shallow Gas Zones / Areas or Coalbed Methane Wells (with Minimal

Water) ................................................................................................................... 8-12 8.4.2 Gas Proration Outside SE Alberta Shallow Gas Zones / Areas (Excluding

Effluent Proration Battery) ....................................................................................8-14 8.4.3 Multiwell Effluent Proration Battery ......................................................................8-16 8.4.4 Single Gas Well or Multiwell Group Gas Battery and Shallow Gas Well or

Coalbed Methane Well with No Condensate or Oil..............................................8-19 8.4.5 Single Gas Well or Multiwell Group Gas Battery with Condensate or Oil............8-21 8.4.6 Gas Storage Schemes .........................................................................................8-23

Directive 017: Measurement Requirements for Oil and Gas Operations (March 2022) v

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