裂变径迹法在煤层气开发研究中的应用  

Application of fission track method in the development study of coalbed methane

作　　者：李小明[1] 彭格林[1] 

机构地区：[1]中国科学院长沙大地构造研究所,长沙410013

出　　处：《核技术》2002年第7期537-540,共4页Nuclear Techniques

基　　金：国家科技攻关课题 (97- 2 2 4 - 0 1 - 0 3 - 0 6);中国科学院知识创新工程重要方向项目 (KZCX2 - 1 0 1 )联合资助

摘　　要：用磷灰石裂变径迹法研究了淮南煤田新集矿区的构造热演化史 ,探讨其煤层气资源潜力。结果表明 :研究区自晚古生代以来 ,至少发生过 3次明显的构造热事件 ,古地温梯度比现地温梯度低 ,估计本区整个剥蚀厚度大于 2 0 0 0m ;煤化作用主要发生在 2 4 0— 14 0Ma之间 ,生气量不太高 ,白垩纪晚期的构造热运动又导致热成因煤层气大量逸失 。In order to explore potential resource of coalbed methane in Xinji coal deposit of Huainan coalfield, its tectone-thermal evolution history was studied by using fission track technique. The results showed that there had been 3 or more times of significant thermal events occurred in this area since the late Palenzoic Era. The paleo-geothermal gradient was higher than that of the present. It was estimated that the denudation thickness in this area should be over 2000m. Mainly formed between 240-140Ma, no abundant methane could be generated in such condition. Furthermore, the tectone-thermal events would release the most of methane gases. So, the potential resource of the coalbed methane in this are might be limited.

关 键 词：裂变径迹 热事件 古地温梯度 煤层气 

分 类 号：P597[天文地球—地球化学] P622[天文地球—地质学]