Origin of Coalbed Methane in Baode, Northeastern Ordos Basin
详细信息
- 责任者：Tian Wenguang (School of Energy Resources China University of Geosciences ; Beijing 100083 ; China) ; Tang Dazhen
- 刊名：Geological Journal of China Universities
- 出版年：2012
- 卷期：18(3)
- 关键词：煤层气 ; coalbed gas ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.479-484
- 图表：2 illus., 2 tables, 21 refs.
- 分类号：1003
- issnNo：ISSN1006-7493
- isbnNo：CN32-1440/P
摘要
Based on the data of the components and stable isotope composition of the CBM sampled from the producing wells, the genesis was discussed. The results showed that the CBM is mainly composed of the methane with little heavy hydrocarbons. It was suggested that the coalbed methane in the area has a mixed thermogenic and biogenic origin, but thermogenic gas is the main with composition minor of biogenic gas. Biogenic methane was formed through the reduction of carbon dioxide. The chemistry and hydrodynamics of the coalbed water and the porosity and permeability of the strata in the area were favorable of the active population of the methanogenic bacteria.