GB/T 41612-2022 English PDF

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GB/T 41612-2022: Technique specification of shale gas production appraisal
Status: Valid

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Basic data

Standard ID: GB/T 41612-2022 (GB/T41612-2022)
Description (Translated English): Technique specification of shale gas production appraisal
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: E12
Word Count Estimation: 18,114
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41612-2022: Technique specification of shale gas production appraisal

---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.
Technique specification of shale gas production appraisal ICS 75.020 CCSE12 National Standards of People's Republic of China Technical Specification for Production Prediction of Shale Gas Wells Published on 2022-07-11 2022-11-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Data collection and processing1 4.1 Data collection1 4.2 Data processing 2 5 Yield forecast method 2 5.1 Classification of yield forecasting methods 2 5.2 Method based on well test analysis 3 5.3 The method of diminishing output 3 5.4 Productivity Well Testing 5 5.5 Numerical simulation method 5 5.6 Analogy 5 6 Production Forecast Uncertainty Analysis 6 7 Comprehensive analysis of yield forecast results 6 Appendix A (Informative) Typical Flow Patterns of Shale Gas Horizontal Wells7 Appendix B (Informative) Production Decline Model for Shale Gas Wells9 Appendix C (Informative) Guidelines for Compiling Production Forecast Reports for Shale Gas Wells 14

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed and managed by the National Natural Gas Standardization Technical Committee (SAC/TC244). This document is drafted by. China Petroleum & Chemical Corporation Petroleum Engineering Technology Research Institute, CNOOC Research Institute Co., Ltd. Company, China Petroleum & Chemical Corporation Jianghan Oilfield Branch Exploration and Development Research Institute, PetroChina Corporation Southwest Oil and Gas Field Branch Company Shale Gas Research Institute, Sinopec Chongqing Fuling Shale Gas Exploration and Development Co., Ltd., National Energy Shale Gas R&D (Experimental) Center, Sichuan Provincial Energy Investment Group Co., Ltd. The main drafters of this document. Pang Wei, Ding Shidong, Du Juan, Bai Yuhu, Li Jiqing, Zhang Tongyi, He Tong, Shu Zhiguo, Wu Jianfa, Li Wuguang, Zheng Aiwei, Mao Jun, Di Dejia, Guo Xiao, Zhu Kai, He Ying, Xu Bingxiang, Yu Rongze, Fan Jie. Technical Specification for Production Prediction of Shale Gas Wells

1 Scope

This document specifies the requirements for the collection and processing of shale gas well production prediction data, prediction methods, uncertainty analysis, and comprehensive analysis of results. This document applies to shale gas well production forecasts.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. DZ/T 0254 Specification for Estimation of Shale Gas Resources and Reserves SY/T 5440 Technical Specification for Well Testing of Natural Gas Wells SY/T 6171 Gas Reservoir Test Production Geological Technical Specification SY/T 6172 Oilfield Well Testing Technical Specification SY/T 6744 Technical Specification for Numerical Simulation Application of Oil and Gas Reservoirs

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Data collection and processing

4.1 Data collection The information to be collected includes but is not limited to the following. a) Reservoir parameters. target horizon, original formation pressure, original formation temperature, medium depth of reservoir, reservoir thickness, porosity, permeability, permeability rate stress sensitive data (if any), isothermal adsorption test data, water saturation, pore compressibility coefficient, free gas ratio; b) Wellbore parameters. wellbore structure, wellbore trajectory, length of horizontal section; c) Fracturing parameters. length of fracturing section, number of fracturing sections or clusters, amount of fracturing fluid, amount of proppant, displacement, sand ratio, pump pressure; d) Fluid parameters. gas composition, gas relative density, gas compressibility, gas viscosity, gas diffusion coefficient (if any), produced water ore degree (if any); e) Gas extraction method; f) Flowback data. liquid flow, gas production, casing pressure, oil pressure during flowback; g) Production data. see Table 1; h) Dynamic monitoring data. static pressure, production flow pressure, wellbore pressure gradient, static temperature, flow temperature, wellhead temperature, wellbore temperature gradient, production profile test data (if any), microseismic test data (if any), tracer test data (if any); i) Other data. It is necessary to determine the necessary data according to the selected yield forecasting method. ---If the production prediction method based on pressure recovery well test is selected, pressure recovery data is required; ---If the production prediction method of the productivity well test method is selected, the productivity well test data is required. ......

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