The geological model of coalbed methane(CBM) reservoir in the eastern Ordos Basin

被引：0

作者：

Li, Gui-Hong ^{[1
]}

Zhang, Hong ^{[1
]}

机构：

[1] Xi'an Research Institute of China Coal Technology & Engineering Group Corp., Xi'an

来源：

Natural Gas Geoscience | 2015年 / 26卷 / 01期

关键词：

Coalbed methane(CBM); Favorable areas; Ordos Basin; Reservoir geological model; Upper Paleozoic;

D O I：

10.11764/j.issn.1672-1926.2015.01.0160

中图分类号：

学科分类号：

摘要：

With over 20 year history, although the CBM development succeeded in some areas in the eastern Ordos Basin, such as Baode, Liulin, etc., the overall industrialization isn't balanced. Besides the engineering factors, the divergence of the CBM geology still exists and the building of CBM reservoir model will help to select favorable areas. The Upper Paleozoic CBM reservoir geological model in the eastern Ordos Basin is established. By analyzing the tectonic dynamic condition, sequence stratigraphy, ground water dynamics condition and gas origin, three geological models of CBM reservoir-formation in the eastern Ordos Basin are constructed, including the monocline and low coal rank model, raised arch of the basements and medium coal rank model, and thrust and high coal rank model. The typical areas are Fugu, Wubao-Liulin and Hancheng. The relatively sweet block lies near the stagnant area of the ground water in the monocline and low coal rank model, the tensile nose-shaped uplifted zone in the raised arch of the basements and medium coal rank model, and the compressed tectonic regime in the thrust and high coal rank model. There is good matching to the key elements of CBM reservoir-formation dynamic system in the Wubao-Liulin, which is proposed as the preferred developmental areas in the eastern Ordos Basin, with the best gas storage capacity and permeability; in the monocline and low coal rank model in the Fugu, although the permeability is high, the gas content is low; in the thrust and high coal rank model in Hancheng, the preservation condition is excellent, however, influenced by the thrust belts, the coal structure is destroyed strongly, and the gas recovery declines. ©, 2015, Science Press. All right reserved.

引用

页码：160 / 167

页数：7

共 29 条

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