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Analysis of the Key Factors Affecting the Productivity of Coalbed Methane Wells: A Case Study of a High-Rank Coal Reservoir in the Central and Southern Qinshui Basin, China

文献类型：期刊论文

作者Li, Pengpeng4,5; Zhang, Xiaodong1; Li, Jing5; Zhao, Jiapan3; Huang, Junping2; Zhang, Shuo1; Zhou, Shixin5
刊名ACS OMEGA
出版日期2020-11-03
卷号5期号:43页码:28012-28026
ISSN号2470-1343
DOI10.1021/acsomega.0c03540
英文摘要In the present study, three CBM blocks in the central and southern Qinshui Basin, China, including Fanzhuang, Zhengzhuang, and Changzhi blocks, were selected. Combined with the data, such as the physical properties of coal reservoirs, logging, hydrofracture operation, injection/drawdown well testing, microseismic fracture monitoring technology, and over 2000 days gas production rate, the key factors affecting the gas production rate of CBM wells were analyzed comprehensively and systematically. Unimodal and bimodal models can be identified according to the long-term gas production rate data. The unimodal model corresponds to a declining pump pressure curve, meaning that caprock integrity is destroyed during hydrofracture operations, commonly causing poor gas production performance. The bimodal model is associated with fluctuating-rising and stable pump pressure curves, indicating good hydrofracture consequences. On the premise of the relatively high gas content, the gas saturation/ critical-reservoir pressure ratio, permeability, and coal deformation are the major geological factors that affect the long-term gas production performance of CBM wells. Engineering factors, including pollution by the drilling fluid and cement paste, the type of the fracturing fluid, tonstein intercalation, coal deformation, and in situ stress, affect gas production performances via the following four mechanisms: the effect of hydrofracture operations on caprock integrity, the effect of fluids pumped on the pore-fracture system, the initiation and propagation of artificially induced fractures, and the performances of proppants pumped. This work can provide guidelines for the optimization and development of high-rank CBM blocks.
资助项目National Nature Science Foundation of China[U1904126] ; National Nature Science Foundation of China[41872147]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000589243500030
出版者AMER CHEMICAL SOC
资助机构National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/98680]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Zhang, Xiaodong; Li, Jing
作者单位1.Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo 454000, Henan, Peoples R China
2.Petro China, Res Inst Petr Explorat & Dev Northwest, Lanzhou 730000, Peoples R China
3.PetroChina Co, Shanxi Coalbed Methane Explorat & Dev Branch, Jincheng 048000, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式
GB/T 7714		 Li, Pengpeng,Zhang, Xiaodong,Li, Jing,et al. Analysis of the Key Factors Affecting the Productivity of Coalbed Methane Wells: A Case Study of a High-Rank Coal Reservoir in the Central and Southern Qinshui Basin, China[J]. ACS OMEGA,2020,5(43):28012-28026.
APA Li, Pengpeng.,Zhang, Xiaodong.,Li, Jing.,Zhao, Jiapan.,Huang, Junping.,...&Zhou, Shixin.(2020).Analysis of the Key Factors Affecting the Productivity of Coalbed Methane Wells: A Case Study of a High-Rank Coal Reservoir in the Central and Southern Qinshui Basin, China.ACS OMEGA,5(43),28012-28026.
MLA Li, Pengpeng,et al."Analysis of the Key Factors Affecting the Productivity of Coalbed Methane Wells: A Case Study of a High-Rank Coal Reservoir in the Central and Southern Qinshui Basin, China".ACS OMEGA 5.43(2020):28012-28026.

入库方式： OAI收割

来源：地质与地球物理研究所

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