沁水盆地中南部上主煤层超压史数值模拟研究  

NUMERICAL SIMULATION RESEARCH ON THE OVERPRESSURE HISTORY OF UPPER MAIN COAL SEAM IN CENTRAL-SOUTH QINSHUI BASIN

作　　者：韦重韬[1] 秦勇[1] 满磊[1] 

机构地区：[1]中国矿业大学资源与地球科学学院

出　　处：《天然气工业》2005年第1期81-84,共4页Natural Gas Industry

基　　金：973国家重点基础研究发展规划项目"中国煤层气成藏机制及经济开采基础研究"(2002CB11700)资助;国家自然科学基金项目(50172058)

摘　　要：为研究煤层气地质演化历程中的超压现象,建立了煤层气地质演化史模型并对沁水盆地中南部上主 煤层进行了模拟计算。结果表明:区内上主煤层在燕山末期及以后确实存在超压现象,且主要分布在本区中部和 南部。超压的发育程度受构造演化史、埋藏史以及热史和煤系、煤层特征的控制和影响。超压与煤层气富集的关 系较为复杂,在超压与构造演化史、埋藏史和热史形成适当时空配置的条件下,才有可能形成煤层气的富集。In order to investigate the overpressure phenomenon in the course of coalbed methane geological evolution, a relevant model was set up, by which a simulation calculation was carried out for the upper main coal seam in central-south Qinshui Basin. The results indicated that there existed certainly the overpressure phenomenon in the upper main coal seam within study region at the end of Yanshan epoch and it was mainly found in the central-south part of the region; the degree of overpressure development was controlled and affected by the structural evolution, burial and thermal evolution histories and the features of coal measures and coal seams; and the relation between overpressure and coalbed methane enrichment was relatively complex, and only under the condition of forming suitable time-space interrelation of the overpressure with the structural evolution. burial and thermal evolution histories, could the coalbed methane enrichment be realized.

关 键 词：煤层气 超压 沁水盆地 数值模拟 

分 类 号：P618.11[天文地球—矿床学]