CBM Resources/reserves classification and evaluation based on PRMS rules

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Fa, Guifang^1 ; Yuan, Ruie^1 ; Wang, Zuoqian^1 ; Lan, Jun^1 ; Zhao, Jian^1 ; Xia, Mingjun^1 ; Cai, Dechao^1 ; Yi, Yanjing^1

PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China^1

关键词: Classification and evaluations;    Classification criterion;    Contingent resources;    Displacement mechanisms;    Economic requirements;    Interference effects;    Production behaviors;    Testing requirements;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/5/052080/pdf
DOI  :  10.1088/1755-1315/121/5/052080

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper introduces a set of definitions and classification requirements for coalbed methane (CBM) resources/reserves, based on Petroleum Resources Management System (PRMS). The basic CBM classification criterions of 1P, 2P, 3P and contingent resources are put forward from the following aspects: ownership, project maturity, drilling requirements, testing requirements, economic requirements, infrastructure and market, timing of production and development, and so on. The volumetric method is used to evaluate the OGIP, with focuses on analyses of key parameters and principles of the parameter selection, such as net thickness, ash and water content, coal rank and composition, coal density, cleat volume and saturation and absorbed gas content etc. A dynamic method is used to assess the reserves and recovery efficiency. Since the differences in rock and fluid properties, displacement mechanism, completion and operating practices and wellbore type resulted in different production curve characteristics, the factors affecting production behavior, the dewatering period, pressure build-up and interference effects were analyzed. The conclusion and results that the paper achieved can be used as important references for reasonable assessment of CBM resources/reserves.