阜新盆地地下水对煤层气成藏的控制作用  

作　　者：许丕伟 

机构地区：[1]东北煤田地质局107勘探队,辽宁阜新123000

出　　处：《黑龙江科技信息》2010年第1期22-22,202,共2页Heilongjiang Science and Technology Information

摘　　要：地下水动力条件是制约煤层气成藏及煤层气地球化学特性的重要因素。研究表明,当系统内外水动力能平衡时,地下水对煤层气表现为封闭;当系统内水动力能强于系统外水动力能时,地下水对煤层气表现为运移逸散且导致煤层气甲烷碳同位素变轻;当系统内水动力能弱于系统外水动力能时,地下水对煤层气表现为封堵。认为向斜或单斜内,煤层气系统外水动力能强于煤层气系统内或系统内外水动力平衡区域均有利于煤层气成藏,适合进行煤层气勘探开发。Hydredynamics of the underground water restricts the coalbed methane pool formation and its geochemical characteristics. If the Hydrodynamics maintain its equilibrium, the combed methane is sealed by water;, if the Hydrodynamics in system is stronger than its out the system, the combed methane is transported by water and escapes; if he Hydrodynamics out system is stronger than its in the system, the coalbed methane is blocked up by water. When Hydrodynamics maintain its equilibrium or the Hydrodynamics out system is stronger than its in the system in syneline or in monocline, the coalbed methane is favorable to exploring.

关 键 词：地下水 煤层气系统 动力平衡 阜新盆地 

分 类 号：P618.130.2[天文地球—矿床学] TD745[天文地球—地质学]