LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (4): 103-108.doi: 10.3969/j.issn.1673-8926.2015.04.015

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AVO response characteristics of coalbed methane stratum in Qinshui Basin

Feng Xiaoying1, Qin Fengqi1, Tang Yutong2, Liu Hui1, Wang Ya1   

  1.  1. Research Institute of Geophysical Exploration , PetroChina Huabei Oilfield Company , Renqiu 062552 , Hebei , China ;2. Coalbed Gas Exploration and Development Company , PetroChina Huabei Oilfield Company , Jincheng 048000 , Shanxi , China
  • Online:2015-07-20 Published:2015-07-20

Abstract:

With the deepening of exploration and development of coalbed methane in Qinshui Basin, It was found that the enrichment rule of coalbed methane is one of the key factors influencing the development efficiency, and AVO technique is important to predict the enrichment rule of coalbed methane. What are the AVO response characteristics of coalbed and coalbed methane? Are they as the same as sand bed gas? For these questions, this paper studied the fluid substitution of different lithologies and its AVO response characteristics under different gas saturation in Qinshui Basin. The result shows that the AVO response characteristic of coalbed is different from coalbed methane, the AVO characteristic of coalbed is “dim spot”, and the AVO characteristic of coalbed methane is “relatively bright spot”. This study can provide reliable technical support for the exploration and development of coalbed methane.

Key words: accumulation conditions, exploration potential, Exmouth Plateau, North Carnarvon Basin

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