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GB/T 40548-2021: Technical specification of separate layers pressure control and combined layers drainage for coalbed methane wells
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Technical specification of separate layers pressure control and combined layers drainage for coalbed methane wells
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GB/T 40548-2021
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Basic data | Standard ID | GB/T 40548-2021 (GB/T40548-2021) | | Description (Translated English) | Technical specification of separate layers pressure control and combined layers drainage for coalbed methane wells | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D15 | | Word Count Estimation | 10,126 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40548-2021: Technical specification of separate layers pressure control and combined layers drainage for coalbed methane wells
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Technical specification of separate layers pressure control and combined layers drainage for coalbed methane wells
ICS 75.020
CCSD15
National Standards of People's Republic of China
Technical specifications for coalbed methane wells with stratified controlled compression layer drainage and production
Released on 2021-08-20
2022-03-01 implementation
State Administration of Market Supervision and Administration
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 Purpose and Mission 1
5 Pressure control method 2
6 Drainage equipment 2
7 Production management 6
8 Construction safety requirements 6
Appendix A (informative) Daily report of double seam layered controlled compression seam drainage 7
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"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by the China Coal Industry Association.
This document is under the jurisdiction of the National Coal Standardization Technical Committee (SAC/TC42).
This document was drafted by. China Coal Science and Industry Group Xi'an Research Institute Co., Ltd.
The main drafters of this document. Du Xinfeng, Zhang Qun, Du Zhiqiang, Zhang Dongliang, Xu Yaobo, Zhang Peihe, Jiang Wenping, Zheng Yuzhu, Wang Zhengxi,
Duan Yanning and Wu Jing.
Technical specifications for coalbed methane wells with stratified controlled compression layer drainage and production
1 Scope
This document specifies the purpose and tasks of the drainage and production of coalbed methane wells, the pressure control method, the drainage equipment, the drainage management, and the construction safety.
All requirements.
This document is applicable to CBM well drainage projects under the conditions of double seams and multiple coal seams.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 31537 CBM (coal mine gas) terminology
SY/T 6921 Safety technical specification for coalbed methane well drainage
3 Terms and definitions
The following terms and definitions defined in GB/T 31537 apply to this document.
3.1
Separatelayerspressurecontrol
Through the use of packers and other tools, the hydraulic connection between the coal seams is separated, so that the coal seams are in different periods during the whole or part of the drainage process.
Technical measures under the stressful environment.
3.2
Combinedlayersdrainage
In the process of coalbed methane drainage, multiple production layers produce water and gas through one wellbore.
4 Purpose and mission
4.1 Purpose of coal mine drainage
According to the differences in the characteristics of coal reservoirs, each target layer is sealed in its own independent pressure system, and different fluids are used to face each target coal layer.
Pressure control management is implemented to reduce the damage of the reservoir during drainage, realize the simultaneous desorption and gas production of each coal seam, and improve the efficiency of drainage and production.
4.2 Coal mining task
According to the characteristics of coal reservoirs, reasonable selection of drainage equipment and pipe string structure, according to the principle of stability and continuity, optimize the drainage system, and control each coal
The laminar flow pressure changes, so that each reservoir can drain and produce gas in the optimal state.
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