几种煤层气含量测量方法的对比
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摘要
本文主要介绍几种现有的煤层瓦斯量的计算方法。在其基础上,以淮南顾桥矿区现有的资料为基础,运用其中两种方法对其煤层瓦斯含量进行计算。一种方法基于实验室解析数据,运用温度和压强对瓦斯吸附量的影响进行校正,得出校正值。另一种方法以测井、地震资料为基础,在地震反演数据的基础上,应用Langmuir方程来计算煤层的吸附瓦斯含量,并与其它方法做了对比。综合分析认为:基于地震反演数据基础上的Langmuir方程计算煤层吸附瓦斯量的方法与基于有限的单井计算得出整个煤层的瓦斯分布相比较,更能反映煤层沉积、构造及煤层气储层的细节。
The paper mainly describes several existing methods for computation of coalbed methane quantity,based on which two methods are applied for calculation of the gas content of coal seam by using existing data from Guqiao mine in Huainan mine area.The first method is based on analytical data obtained from the laboratory.The results are corrected by using the influence of temperature and intensity of pressure on adsorption quantity,and the corrected value is then obtained.The other method is based on logging and seismic data.The overall analysis considers that when compared with other method which is applied for calculation of gas distribution in the entire coal seam based on limited single well computation data,the Langmuir equation method for calculation of seam adsorption gas quantity based on seismic inversion data,can better reflect the details of seam deposition,structure and coalbed methane reservoir.
The paper mainly describes several existing methods for computation of coalbed methane quantity,based on which two methods are applied for calculation of the gas content of coal seam by using existing data from Guqiao mine in Huainan mine area.The first method is based on analytical data obtained from the laboratory.The results are corrected by using the influence of temperature and intensity of pressure on adsorption quantity,and the corrected value is then obtained.The other method is based on logging and seismic data.The overall analysis considers that when compared with other method which is applied for calculation of gas distribution in the entire coal seam based on limited single well computation data,the Langmuir equation method for calculation of seam adsorption gas quantity based on seismic inversion data,can better reflect the details of seam deposition,structure and coalbed methane reservoir.
引文
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[2]鲜学福,辜敏.有关间接法预测煤层气含量的讨论[J].中国工程科学,2006,8(8).
[3]全国煤炭标准化委员会.GB/T19559-2004煤层气含量测定方法[S].北京:中国标准出版社,2004.
[4]叶晓斌.煤层气常规测井方法探讨[J].云南地质,2000,19(4).
[5]傅雪海,吴桁,权彪,等.淮南潘谢深部煤层含气预测[C].2008年煤层气学术研讨会论文集.
[6]孟召平,苏永华.沉积岩体力学理论与方法[M].北京:科学出版社,2006.
[7]田靖安,等.煤层瓦斯压力分布规律及预测[J].方法采矿与安全工程学报,2008,25(4).
[8]陈大力,陈洋.对我国煤层瓦斯含量测定方法的评述[J].煤矿安全,2008.
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