煤层气高渗区综合预测技术——以大宁、韩城地区为例  

COMPREHENSIVE PREDICTION TECHNOLOGY OF HIGH PERMEABILITY ZONE FOR COAL-BED GAS——TAKING DANING AND HANCHENG AREAS AS EXAMPLE

作　　者：马财林[1] 李延祥[1] 权海奇[1] 李宁[1] 陈静[1] 

机构地区：[1]长庆油田分公司勘探开发研究院

出　　处：《天然气工业》2004年第5期85-87,共3页Natural Gas Industry

摘　　要：煤层气高产富集区除受基本地质、成藏条件制约外 ,还与煤层渗透率有关。而煤层渗透率主要受裂隙系统的影响 ,其值可以通过煤层气井的注入压降测试法获得 ,但工区内煤层气钻井数量有限 ,注入压降测试方法正趋完善。因而 ,本文采用野外地质剖面观察、岩石声发射测试和遥感地质解译等间接技术 ,建立“天空、地面和地下”三位一体的煤层高渗区综合预测模型 ,以全方位裂缝密度统计为主 ,预测煤层高渗区 ,进而评价区内煤层气高产富集区 。Besides the restraints of geology and reservoir forming conditions,rich coal-bed gas zones with high productivity are related to the permeability of the coal-bed. The coal-bed permeability is mainly controlled by the fracture system. Its value can be obtained by the pressure-drop test method with injection of the coal-bed gas well. But the number of the coal-bed gas wells is limited in the working area,and the pressure-drop test method with injection is not perfect now. So,with some indirect techniques,such as geologic section observation, acoustical emission test,and remote sensing interpretation,etc.,the 3-in-1 comprehensive prediction model of“sky,surface and underground”is established for high permeability zones of coal-bed. Mainly according to the omni-bearing statistics of fracture density,it is able to predict the high permeability zones of the coal-bed,evaluate the high production zones of the coal-bed gas,and select the favorable prospects of the coal-bed gas.

关 键 词：煤层气 勘探技术 地表岩石节理 煤层割理 匹配关系 

分 类 号：TD84[矿业工程—煤矿开采]