Geochemical characteristics and genesis of coalbed methane in China

doi:10.7623/syxb2012S1012

ACTA PETROLEI SINICA ›› 2012, Vol. 33 ›› Issue (S1): 99-106.DOI: 10.7623/syxb2012S1012

• Petroleum Exploration • Previous Articles Next Articles

Geochemical characteristics and genesis of coalbed methane in China

SONG Yan 1,2　LIU Shaobo 1　HONG Feng 1　QIN Shengfei 1

Received:2011-11-18 Revised:2012-04-19 Online:2012-08-25 Published:2012-08-30

中国煤层气地球化学特征及成因

宋　岩 1,2　柳少波 1　洪　峰 1　秦胜飞 1

1　中国石油勘探开发研究院　北京　100083；2　中国石油大学油气资源与探测国家重点实验室　北京　102249

通讯作者: 宋　岩
作者简介:宋　岩，女，1957年10月生，1982年毕业中国石油大学（华东），现为中国石油勘探开发研究院教授、国家973煤层气项目首席科学家，主要从事石油天然气地质学研究。
基金资助:
国家重点基础研究发展计划（973）项目“高丰度煤层气富集机制及提高开采效率研究”(2009CB219600)资助。

Abstract

Abstract:

Geochemical characteristics and genesis of coalbed methane (CBM) are significant for understanding formation and distribution law of CBM reservoir and evaluating CBM resources. Hydrocarbon generation and post-transformation of coal have important effect on CBM chemical composition, carbon isotope and other geochemical characteristics. Therefore the genesis can be determined according to the geochemical characteristics. The paper analyzes CBM geochemical characteristics with a number of CBM component and its carbon isotope data, explores the variation law of geochemical characteristics of native CBM combined with coal evolution process, and investigates the impacts of secondary action on the CBM geochemical characteristics based on type of coal post-transformation. As a result, it points out that post-transformation process, mainly including desorption, secondary biological action and water-soluble effects, greatly affect the CBM geochemical characteristics.

Key words: coalbed methane, geochemical characteristics, carbon isotope, genesis, transformation action

摘要：

煤层气地球化学特征及其成因对于煤层气藏形成和分布规律的认识及煤层气资源评价具有重要意义，煤生烃及后期改造是煤层气化学组分和碳同位素等地球化学特征的重要影响因素，根据地球化学特征可判识其成因。通过大量的煤层气组分及其碳同位素数据分析了中国煤层气地球化学特征；结合成煤演化过程，分析了原生煤层气地球化学特征的变化规律；根据煤后期改造作用的类型分析了次生作用对煤层气地球化学特征的影响。提出煤层气地球化学特征受后期改造影响较大，主要包括解吸作用、次生生物作用和水溶解作用。

关键词: 煤层气, 地球化学特征, 碳同位素, 成因, 改造作用

SONG Yan　LIU Shaobo　HONG Feng　QIN Shengfei. Geochemical characteristics and genesis of coalbed methane in China[J]. ACTA PETROLEI SINICA, 2012, 33(S1): 99-106.

宋　岩　柳少波　洪　峰　秦胜飞. 中国煤层气地球化学特征及成因[J]. 石油学报, 2012, 33(S1): 99-106.

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Geochemical characteristics and genesis of coalbed methane in China

中国煤层气地球化学特征及成因

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