• 责任者：Wang Xinhai (Key Laboratory of Exploration Technologies for Oil and Gas Resource ; Yangtze University ; Ministry of Education ; Jingzhou 434023 ; China) ; Zhang Dongli
• 刊名：Acta Geologica Sinica
• 出版年：2008
• 卷期：82(10)
• 关键词：煤层气 ; coalbed gas ; 采油工程 ; petroleum engineering
• 页码：p.1437-1443
• 图表：6 illus., 1 table, 13 refs.
• 分类号：1003
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

A rather whole mathematical model of multilateral horizontal pinnate well for CBM recovery is developed.  The coalbed is considered as dual medium and the factors including heterogeneity and anisotropy of stratum, sensitivity of permeability to pressure, friction and acceleration loss in well bore and start-up pressure derivative in low permeability coalbed are considered in this model. The mechanism of multilateral horizontal pinnate well for CBM recovery is analyzed by using of simulation technique. It is pointed that whole pinnate well bore spreading widely and evenly in coalbed makes stratum pressure dropped evenly and fast, which increases the chance of desorption and diffusion in area controlled.