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Aquifer Leakage Recharge Controls on CBM Production: A Case Study in the Sanjiao Block, Eastern Ordos Basin, China.
Yan, Xinlu; Chang, Suoliang; Tang, Shuheng; Meng, Yanjun; Yan, Taotao; Zhang, Sheng; Zhao, Dekang.
Afiliação
  • Yan X; College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
  • Chang S; China United CBM (Shanxi) Ltd., Taiyuan 030032, China.
  • Tang S; Provincial Center of Technology Innovation for Coal Measure Gas Co-Production, Taiyuan 030032, China.
  • Meng Y; College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
  • Yan T; School of Energy, China University of Geosciences (Beijing), Beijing 100083, China.
  • Zhang S; College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
  • Zhao D; Provincial Center of Technology Innovation for Coal Measure Gas Co-Production, Taiyuan 030032, China.
ACS Omega ; 9(38): 40019-40033, 2024 Sep 24.
Article em En | MEDLINE | ID: mdl-39346831
ABSTRACT
Aquifer leakage recharge poses a prevalent challenge in coalbed methane (CBM) development, severely impeding its efficient production. This study focuses on the Sanjiao Block, located on the eastern margin of the Ordos Basin, and provides a comprehensive evaluation of the impact of aquifer leakage recharge on CBM well productivity, employing hydrochemical characteristics and numerical simulation. Fisher's discriminant analysis reveals a close association between external water sources for CBM wells in the Taiyuan Formation and the hydrodynamic environment in the western stagnant zone, hydrochemical characteristics resemble those from the Shanxi Formation; in the eastern strong runoff zone, water from the Taiyuan Formation directly contributes to CBM well development; in the central weak runoff zone, hydrochemical characteristics suggest mixed water sources from the Shanxi Formation and Taiyuan Formation. The numerical simulation employs orthogonal experiments to quantify the sensitivity of aquifer geological parameters to CBM production, ranked from strong to weak for aquifer types, leakage channel properties, and aquifer physical properties. The fundamental reason for disparities in the efficacy of leakage recharge lies in categorizing aquifers into finite and infinite recharges based on their water supply capacity. The properties of leakage channels, including the location and scale, manifest as effects on the magnitude and shape of gas production characteristics in infinite and finite recharge aquifers, respectively. Furthermore, a discriminant flowchart of CBM production is presented, delineating the production characteristics of CBM wells under the influence of aquifer leakage recharge into six patterns and illustrating their distribution in the study area. This discriminant process provides scientific guidance for analyzing CBM production characteristics and evaluating potential under the influence of aquifer leakage recharge.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Omega Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Omega Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Estados Unidos