GB/T 41614-2022 English PDF

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GB/T 41614-2022: Estimated methods of shale gas recoverable reserves
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Basic data

Standard ID: GB/T 41614-2022 (GB/T41614-2022)
Description (Translated English): Estimated methods of shale gas recoverable reserves
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: E24
Word Count Estimation: 10,114
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41614-2022: Estimated methods of shale gas recoverable reserves

---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.
Estimated methods of shale gas recoverable reserves ICS 75.060 CCSE24 National Standards of People's Republic of China Evaluation method of shale gas recoverable reserves 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 General Rules for the Evaluation of Recoverable Reserves 1 5 Estimation of technically recoverable reserves2 5.1 Static method 2 5.2 Dynamic method 2 5.3 Probabilistic method 3 6 Estimation of economically recoverable reserves3 6.1 General 3 6.2 Cash flow method3 6.3 The Economic Limit Method 4 6.4 Estimated parameters for economic evaluation 4 6.5 Economic Evaluation Estimate Requirements 5 6.6 Sensitivity analysis 5 7 Comprehensive evaluation of recoverable reserves5 7.1 Reasonableness5 7.2 Reserve scale5 7.3 Economic value5 7.4 Degree of uncertainty 6 7.5 Anti-risk ability 6 Appendix A (normative) Reserve scale7

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 Exploration and Development Research Institute, China National Petroleum Corporation Shale Gas Research Institute of Southwest Oil and Gas Field Branch, Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., CNOOC Energy Development Co., Ltd. Engineering Technology Branch of the company, Oil and Gas Resources Strategic Research Center of the Ministry of Natural Resources, China Petroleum & Chemical Corporation Jianghan Oilfield Branch Exploration and Development Research Institute, China National Petroleum Corporation Exploration and Development Research Institute, China National Petroleum Corporation Changqing Oil Co., Ltd. Tian Branch, China University of Geosciences (Beijing). The main drafters of this document. Huang Xuebin, Zhang Fengdong, Li Jun, Jiang Xin, Zhang Lian, Shi Peng, Liu Lingtong, Zhu Yihui, Wei Shaolei, Han Zheng, Pan Lisheng, Wang Li, He Lei, Zhang Jinchuan. Evaluation method of shale gas recoverable reserves

1 Scope

This document specifies the estimation methods and comprehensive evaluation requirements for recoverable reserves of shale gas. This document is applicable to the estimation and evaluation of proven recoverable reserves of shale gas, and the evaluation of recoverable reserves of shale gas of other grades can be implemented by reference.

2 Normative references

There are no normative references in this document.

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 project project A representation of the connection between shale gas reservoirs and the decision-making process. Note. A project can be the development of a single shale gas reservoir, or the comprehensive development of a single well, a group of wells or multiple shale gas reservoirs. 3.2 low valuation lowestimate Through the implementation of the project, a conservative estimate of the actual production volume from shale gas reservoirs. Note. If the probability method is adopted, the probability that the actual recovery amount equals or exceeds the estimated value is at least 90% (P90). 3.3 high valuationhighestimate Through the implementation of the project, an optimistic estimate of the actual production volume from shale gas reservoirs. Note. If the probability method is used, the probability that the actual recovery amount equals or exceeds the estimated value is at least 10% (P10). 3.4 bestestimate Through the implementation of the project, the most probable estimate of the actual production volume from the shale gas reservoir. Note. If the probability method is adopted, the probability that the actual recovery amount equals or exceeds the estimated value is at least 90% (P90).

4 General rules for the assessment of recoverable reserves

4.1 The recoverable reserves are divided into technical recoverable reserves and economic recoverable reserves. 4.2 During each exploration and development stage from proving to abandonment, it is necessary to select the suitable ones according to the geological engineering data and technical and economic conditions at the time of evaluation. A good evaluation method comprehensively estimates recoverable reserves. 4.3 The recoverable reserves should be assessed annually. When geological knowledge changes, or with changes in technical and economic conditions and the addition of new data, Technically recoverable and economically recoverable reserves need to be reassessed. 4.4 According to the uncertainty of the parameters in the evaluation method, reflect the uncertainty range of recoverable reserves, estimate the low value (P90), high value of recoverable reserves Valuation (P10) and Best Valuation (P50). ......

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