1、Manual of PetroleumMeasurement StandardsChapter 12Calculation of Petroleum QuantitiesSection 2Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction FactorsPart 2Measurement TicketsTHIRD EDITION, JUNE 2003REAFFIRMED, SEPTEMBER 2010Manual of PetroleumMeasureme
2、nt StandardsChapter 12Calculation of Petroleum QuantitiesSection 2Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction FactorsPart 2Measurement TicketsMeasurement CoordinationTHIRD EDITION, JUNE 2003REAFFIRMED, SEPTEMBER 2010SPECIAL NOTESAPI publications ne
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14、 D.C. 20005.Copyright 2003 American Petroleum InstituteFOREWORDThis ve-part publication consolidates and presents standard calculations for meteringpetroleum liquids using turbine or displacement meters. Units of measure in this publicationare in International System (SI) and United States Customary
15、 (USC) units consistent withNorth American industry practices.This standard has been developed through the cooperative efforts of many individualsfrom industry under the sponsorship of the American Petroleum Institute and the Gas Pro-cessors Association.API publications may be used by anyone desirin
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17、s or damage resultingfrom its use or for the violation of any federal, state, or municipal regulation with which thispublication may conict.Suggested revisions are invited and should be submitted to the standardization manager,American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005
18、.iiiCONTENTSPage1 PURPOSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 APPLICATION OF P
19、ART 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ORGANIZATION OF STANDARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.1 Part 1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、. . . . . . . . . . 14.2 Part 2Measurement Tickets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.3 Part 3Proving Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.4 Part 4Calculation of Base Prover Volumes by Water
21、draw Method . . . . . . . . . 24.5 Part 5Calculation of Base Prover Volumes by Master Meter Method . . . . . . . 25 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 FIELD OF APPLICATION . . . . . . . . . . . . . . . . . . .
22、 . . . . . . . . . . . . . . . . . . . . . . . . . . . 36.1 Applicable Liquids. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36.2 Base Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
23、7 PRECISION, ROUNDING, AND DISCRIMINATION LEVELS. . . . . . . . . . . . . . . . 37.1 Rounding of Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.2 Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24、. . . . . . . . 38 DEFINITIONS, SYMBOLS, AND ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . 48.1 Denitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48.2 Symbols and Abbreviations . . . . . . . . . . . . . . . . . . . .
25、 . . . . . . . . . . . . . . . . . . . . . . 59 CORRECTION FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69.1 Liquid Density Correction Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69.2 Meter Factors and Composi
26、te Meter Factors (MFs, CMFs). . . . . . . . . . . . . . . . . 79.3 Combined Correction Factor (CCF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.4 Correction for Sediment and Water (CSW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 710 RECORDING OF FIELD DATA
27、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 711 RULES FOR ROUNDING, CALCULATIONAL SEQUENCE, AND DISCRIMINATION LEVELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 712 MEASUREMENT TICKET EXAMPLES. . . . . . . . . . . .
28、 . . . . . . . . . . . . . . . . . . . . . . 1112.1 Low Vapor Pressure Liquids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1112.2 High Vapor Pressure Liquids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15vPageFigures1 Measuremen
29、t Ticket Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Tables1 Specied Discrimination Levels for Field Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 Liquid Density Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . .
30、 . . . . . . . . . 93 Temperature Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Pressure Discrimination Levels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Compressibility Factor Discrimination Levels. . . .
31、. . . . . . . . . . . . . . . . . . . . . . . . . 97 Volume Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Correction Factor Discrimination Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10vi1Chapter 12Calculation of
32、Petroleum QuantitiesSection 2Calculation of Petroleum Quantities Using Dynamic Measurement Methods and Volumetric Correction FactorsPart 2Measurement Tickets1 PurposeWhen most of the older standards were written, mechani-cal desk calculators were widely used for calculating mea-surement documentatio
33、n, and tabulated values were usedmore widely than is the case today. Rules for rounding andthe choice of how many gures to enter in each calculationstep were often made on the spot. As a result, different opera-tors obtained different results from the same data.This ve-part publication consolidates
34、and standardizescalculations pertaining to metering petroleum liquids usingturbine or displacement meters and claries terms andexpressions by eliminating local variations of such terms. Thepurpose of standardizing calculations is to produce the sameunbiased answer from the given data. So that differ
35、ent opera-tors can obtain identical results from the same data, the rulesfor sequence, rounding, and discrimination of gures (or dec-imal places) have been dened.2 ScopeThis document provides standardized calculation methodsfor the quantication of liquids and the determination of baseprover volumes
36、under dened conditions, regardless of thepoint of origin or destination or the units of measure requiredby governmental customs or statute. The criteria contained inthis document allow different entities using various computerlanguages on different computer hardware (or manual calcu-lations) to arri
37、ve at identical results using the same standard-ized input data.The publication rigorously species the equations for com-puting correction factors, rules for rounding, calculationalsequence, and discrimination levels to be employed in the cal-culations. No deviations from these specications are perm
38、it-ted since the intent of this document is to serve as a rigorousstandard.3 Application of Part 2The purpose of standardizing the terms and arithmeticalprocedures employed in calculating the amount of petro-leum liquid on a measurement ticket is to avoid disagree-ment between the parties involved.
39、The purpose of Part 2,Measurement Tickets, is to obtain the same unbiasedanswer from the same measurement data, regardless of whoor what does the computing.Calculations of correction factors and volumes may bedone using continuous online integration techniques if agreedbetween the parties. The resul
40、ts of these calculations may notagree with the methods contained in this standard due to thevariability in obtaining owing parameters. However, theequations for computing correction factors and the rules forrounding, calculation sequence, and discrimination levels forany continuous online integratio
41、n methods shall be identicalto the specications contained in this standard.A measurement ticket is a written acknowledgment of atransfer of petroleum liquids and is the legal document oftransfer. In addition, it serves as an agreement between theauthorized representatives of the parties concerned as
42、 to themeasured quantities and quality of the liquid. The measure-ment ticket shall contain all eld data required to calculate themetered quantities.Care must be taken to ensure that all copies of a measure-ment ticket are legible. Proper scal procedures forbid mak-ing corrections or erasures on a m
43、easurement ticket unless theinterested parties agree to do so and initial the ticket to thateffect. Should a mistake be made, the ticket should be markedVOID and a new ticket prepared. The voided ticket shouldbe attached to the new one to support the validity of the cor-rected ticket.4 Organization
44、of StandardThe standard is organized into ve separate parts. Part 1contains a general introduction for dynamic calculations.Part 2 focuses on the calculation of metered quantities for s-cal purposes or measurement tickets. Part 3 applies to meterproving calculations for eld operations or proving rep
45、orts.Parts 4 and 5 apply to the determination of base prover vol-umes (BPVs).4.1 PART 1INTRODUCTIONThe base (reference or standard) volumetric determinationof metered quantities is discussed along with the generalterms required for solution of the equations.General rules for rounding of numbers, inc
46、luding elddata, intermediate calculational numbers, and discriminationlevels, are specied.For the proper use of this standard, prediction of thedensity of the liquid in both owing and base conditions isdiscussed.2 API MANUALOFPETROLEUMMEASUREMENTSTANDARDS, CHAPTER12CALCULATIONOFPETROLEUMSTANDARDSAn
47、explanation of the principal correction factors associ-ated with dynamic measurement is presented.4.2 PART 2MEASUREMENT TICKETSThe application of this standard to the calculation ofmetered quantities is presented for base volumetric calcu-lations in conformance with North American industrypractices.
48、Recording of eld data, rules for rounding, discrimina-tion levels, calculation sequences, along with a detailedexplanation with appropriate ow charts and a set of exam-ple calculations. The examples can be used to aid in check-out procedures for any computer calculation routines thatare developed on
49、 the basis of the requirements stated in thisstandard.4.3 PART 3PROVING REPORTSThe application of this standard to the calculation of meterfactors is presented for base volumetric calculations in con-formance with North American industry practices. Provingreports are utilized to calculate the meter correction and/orperformance indicators. The determination of the appropriateterm is based on both the hardware and the users preference.Recording of eld data and rules for rounding, calculationsequences, and discrimination levels are specied
