测井解释煤层气藏

煤气是指煤层中吸附和游离状态的甲烷天然气，是天然气能源的重要组成部分，测井不仅是勘探石油与天然气的重要方法，而且也是勘探煤和煤层气的有效手段，采用测井孔隙度叠法解释煤层，煤层气层和围岩气层具有较高的分辨率和直观性，文中还提出了用煤层气层背景和测量值解释煤层含量的新方法，从而估算煤层气藏储量，目前测井解释煤层气工业生产下限值的尚未解释，这个技术难题需要今后继续研究和攻克。

Evaluating Coal-bed Gas Reservoir with Log Data

Coal bed gas refers to absorbed and free methane gas in coal bed, which is an important part of natural gas source. Well logging is not only a means to explore oil/gas but also an effective method to prospect coal and coal bed methane. Using porosity overlay method to interpret coal bed, coal bed gas zone and shoulder gas bed has higher resolution and is more intuitive. A new way to evaluate the content of coal bed methane is proposed, which can be used to estimate coal bed gas reserves. At present, the lower limit value of commerical coal bed gas determined from log data is unsolved. This technical problem needs to be further studied.