Valid

NB/T 11145-2023Geological evaluation method of coalbed methane exploration and development (English PDF)

煤层气勘探开发选区地质评价方法

Preview PDF

This is a limited preview

Buy now to download the full PDF (15 pages)

Need quotation for your management?

Get a formal quotation for NB/T 11145-2023 in 30 minutes.

Issued by

NEA

Level / Type

Industry · Recommended

Issue date

February 6, 2023

Implementation date

August 6, 2023

Scope

NB/T 11145-2023 is the English-translated version of 煤层气勘探开发选区地质评价方法.

NB/T 11145-2023 is the Chinese energy industry method for the geological evaluation used to select areas for coalbed methane exploration and development.

It divides the work into four successive stages, evaluation of block evaluation areas, pre-exploration areas, exploration areas and areas favorable for development, and sets the purpose, tasks, procedure, content and criteria of each.

Informative appendices supply an overall evaluation flowchart and, for every stage, a flowchart and a table of standard parameters. The method relies on standards for coalbed methane content determination, injection and pressure drop well testing, reserve estimation, seismic exploration, production monitoring, well drainage and fracturing design.

It applies to the geological evaluation of coalbed methane within a block. Issued on 6 February 2023, it has applied since 6 August 2023.

Found what you need?

Document preview — NB/T 11145-2023

National Standard of the People's Republic of China

ICS: 73.040
Classification: D 10

Issued by: National Energy Administration of the People's Republic of China

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Division, definition and procedure of coalbed methane geological evaluation stages
5 block evaluation area evaluation
6 Evaluation of the pre-exploration area
7 Exploration Area Evaluation
8 Evaluation of Development Favorable Areas
Appendix A (Informative) Coalbed Methane Geological Evaluation Flowchart
Appendix B (informative) Flowchart of evaluation stage of coalbed methane block evaluation area
Appendix C (Informative) Standard Parameters Table 9 for Evaluation Stage of Coalbed Methane Block Evaluation Area
Appendix D (informative) Flowchart of evaluation stage of coalbed methane prospecting area
Appendix E (Informative) Table 11 Standard Parameters for Evaluation Stage of Coalbed Methane Prospecting Area
Appendix F (Informative) Flowchart of Evaluation Stage of Coalbed Methane Exploration Area
Appendix G (Informative) Table 13 of Standard Parameters in Evaluation Stage of Coalbed Methane Exploration Area
Appendix H (Informative) Flowchart of Evaluation Stages of Favorable Areas for Coalbed Methane Development

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 for Standardization Documents" to be drafted.

1 Scope

This document specifies the purpose, task, procedure, content and evaluation criteria of geological evaluation in the process of coalbed methane exploration and development.

This document is applicable to the geological evaluation of coalbed methane in the block.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 19559 Determination method of coalbed methane content

GB/T 24504 Coalbed methane well injection/pressure drop test method

DZ/T 0216 Coalbed Methane Reserve Estimation Specification

DZ/T 0249 Coalbed methane field development plan preparation specification

NB/T 10002 Code for Seismic Exploration of Coalbed Methane

NB/T 10008 Technical specification for production dynamic monitoring of coalbed methane wells

NB/T 10009 Coalbed Methane Well Drainage Technical Specifications

NB/T 10013-2014 Coalbed methane geological area selection evaluation method

NB/T 10017 Coalbed methane well fracturing design compilation specification

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Block evaluation area

Through regional geological research and analysis, it is considered that the area in the block has the basic geological conditions for coalbed methane accumulation.

3.2 Pre-exploration area

CBM accumulation areas with favorable accumulation conditions, high resource abundance and large resource scale, and exploration prospects are favorable for coalbed methane accumulation.

3.3 Exploration area

Coalbed methane accumulation areas with high abundance of geological reserves, good development conditions, and drainage test production after reservoir reconstruction have reached the reserve calculation standard.

3.4 Favorable development area

Proven geological reserves with high abundance, effective engineering and technical measures, and economically beneficial coalbed methane development areas confirmed by test mining.

According to the phases, purposes and tasks of coalbed methane geological evaluation, it is divided into block evaluation area evaluation, pre-exploration area evaluation, and exploration area evaluation

4 Division, definition and procedure of coalbed methane geological evaluation stages

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

NB/T 11820-2025|NB/T 11821-2025|NB/T 11823-2025|NB/T 11442-2023|GB/T 23249-2009|GB/T 41043-2021

How to Download NB/T 11145-2023

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.