GB/T 26981-2020 English PDF

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GB/T 26981-2020: Analysis method for reservoir fluid physical properties
Status: Valid

GB/T 26981: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26981-2020	1499	Add to Cart	9 days	Analysis method for reservoir fluid physical properties	Valid
GB/T 26981-2011	RFQ	ASK	10 days	Test method for reservoir fluid physical properties	Obsolete

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GB/T 9711   SY/T 6996   SY/T 10025   GB/T 29171   GB/T 26979   

Basic data

Standard ID: GB/T 26981-2020 (GB/T26981-2020)
Description (Translated English): Analysis method for reservoir fluid physical properties
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: E12
Classification of International Standard: 75.020
Word Count Estimation: 81,839
Date of Issue: 2020-11-19
Date of Implementation: 2021-06-01
Older Standard (superseded by this standard): GB/T 26981-2011
Quoted Standard: GB/T 13610; SH/T 0169; SH/T 0604; SY/T 5154
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the basic principles of the physical property analysis of oil and gas reservoir fluids, and specifies the main instruments used, the inspection of oil and gas samples, the preparation, sample transfer, analysis and testing of formation fluids, calculation methods and instrument calibration methods. This standard applies to the determination of the physical properties of oil and gas reservoir fluids.

GB/T 26981-2020: Analysis method for reservoir fluid physical properties

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Analysis method of reservoir fluid physical properties) ICS 75:020 E12 National Standards of People's Republic of China Replace GB/T 26981-2011 Analysis method of reservoir fluid physical properties 2020-11-19 released 2021-06-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Instrumentation 4 5 Sample inspection 4 6 Formation fluid preparation 9 7 Transformation 12 8 Thermal expansion experiment 13 9 Single degassing experiment 13 10 Constant mass expansion experiment 14 11 Multiple degassing experiments 15 12 Constant volume failure experiment 15 13 Formation oil viscosity determination 16 14 Physical property analysis of formation crude oil fluid 19 15 Analysis of physical properties of condensate gas formation fluid 27 16 Analysis of physical properties of volatile crude oil formation fluids 30 17 Analysis of physical properties of wet gas formation fluids 30 18 Physical property analysis of dry gas formation fluid 30 Appendix A (Normative Appendix) Instrument Calibration 32 Appendix B (informative appendix) Single component density and molar mass basic parameter table 38 Appendix C (informative appendix) Formation crude oil separation experiment 40 Appendix D (informative appendix) Black oil formation fluid physical property analysis report format 43 Appendix E (informative appendix) Condensate gas formation fluid physical property analysis report format 57 Appendix F (informative appendix) Separation experiment calculation of condensate gas at various stages of constant volume failure effluent 72 Appendix G (informative appendix) Form of analysis report on physical properties of volatile crude oil formation fluid 75 Appendix H (Informative appendix) Dry gas formation fluid physical property analysis report format 76

Foreword

This standard was drafted in accordance with the rules given in GB/T 1:1-2009: This standard replaces GB/T 26981-2011 "Analytical Methods of Oil and Gas Reservoir Fluid Properties": Compared with GB/T 26981-2011, the main technical The technical changes are as follows: ---Added the definition of dissolved gas-oil ratio and pseudo-components (see 3:9:3, 3:23); ---Modified the definitions of single degassing, black oil, volatile crude oil, condensate gas, moisture, dry gas, bubble point pressure, dew point pressure (see section Chapter 3, Chapter 3 of the:2011 edition); ---Modified the names and specifications of instruments and meters (see 4:1, 4:1 in the:2011 edition); --- Deleted the dead oil cutting distillation method to determine the average relative molar mass and density of the C7 fraction (see 9:2:6 in the:2011 edition); ---Added capillary viscosity test method and electromagnetic viscosity test method (see 13:3, 13:4); ---Added the direct test method of the formation fluid density, namely the high temperature and high pressure density meter method (see 13:5:3); ---Added the calculation method of pseudo-component density and molar mass (see 14:2:2:2, 14:2:2:3); ---Move the calculation part of the separation experiment of the depleted effluent of constant volume of condensate gas to the informative appendix (see Appendix F,:2011 edition 15:6); ---Modified the types of volatile crude oil properties analysis items (see Chapter 16, Chapter 16 of the:2011 edition): Please note that certain contents of this document may involve patents: The issuing agency of this document is not responsible for identifying these patents: This standard was proposed and managed by the National Petroleum and Natural Gas Standardization Technical Committee (SAC/TC355): Drafting organization of this standard: State Key Laboratory of Enhanced Oil Recovery (Exploration and Development Research of China National Petroleum Corporation Institute), China Petroleum & Chemical Corporation Research Institute of Petroleum Exploration and Development, CNOOC Energy Development Co:, Ltd: Engineering Technology Company, Tower Limu Oilfield Company Quality Inspection Center, China University of Petroleum (Beijing): The main drafters of this standard: Zhang Ke, Li Shi, Lun Zengmin, Zhang Xudong, Chen Xinglong, Wang Xiaoqiang, Yang Farong, Sun Changyu, Yu Hongwei, Han Haihai: The previous versions of the standard replaced by this standard are as follows: ---GB/T 26981-2011: Analysis method of reservoir fluid physical properties

1 Scope

This standard clarifies the basic principles of the physical property analysis of oil and gas reservoir fluids, and specifies the main instruments used, the inspection of oil and gas samples, and formation fluids: Preparation, sample transfer, analysis and testing, calculation methods and instrument calibration methods: This standard applies to the determination of the physical properties of oil and gas reservoir fluids:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 13610 Natural gas composition analysis gas chromatography SH/T 0169 Determination of average molecular weight of mineral insulating oil (freezing point reduction method) SH/T 0604 crude oil and petroleum products density determination method (U-shaped vibrating tube method) SY/T 5154 Oil and gas reservoir fluid sampling method

3 Terms and definitions

The following terms and definitions apply to this document: 3:1 Standard conditions referenceconditions Measure the standard temperature and atmospheric pressure required by oil and gas: Note: my country's oil and natural gas measurement standard conditions are specified as 20°C and 0:101325MPa: 3:2 Single degassing singleflash The single-phase hydrocarbon fluid in a certain state, through the process of throttling and expanding to another state, the system changes from single-phase to gas-liquid two-phase Into remain constant: Note: The gas phase is called single degassing, and the liquid phase is called single deoiling: 3:3 Constant composition expansion The hydrocarbons of a certain quality in the system only have energy exchange, but no material is introduced or transmitted: Note: This experiment is generally to measure a certain amount of formation fluid samples under constant temperature conditions to determine the relationship between volume and pressure, also called PV relationship test: 3:4 Multiple degassing differentialliberation At a certain temperature, the process of degassing and exhausting the hydrocarbon system in stages: Note: In this process, the total composition of the system is constantly changing, also known as differential degassing or differential separation: 3:5 Constant volume depletion The volume under the saturation pressure is taken as the constant volume volume, and the system pressure is reduced to the predetermined pressure under the constant temperature condition; the pressure is maintained after equilibrium: Part of the gaseous hydrocarbons are discharged to a constant volume, and the amount and composition of the discharged hydrocarbons at different pressure levels are measured: ......

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