School of Resources and Geosciences,China University of Mining & Technology Geophysical Prospecting and Surveying Team of Northeast Coalfield Geological Bureau

针对黔西地区煤层气资源开发潜力及难度存在较大差异的特征,探索煤层气合层排采的最优层段。依托松河井田煤层气勘查开发示范工程实测资料,分析了井田煤储层发育及煤层气成藏特征,探讨了黔西煤层群发育区煤层气合层开发层段优选的原则、参数及方法,并据此利用模糊综合评判法优选出松河井田最优开发层段。研究表明:井田煤层气资源主要赋存于龙潭组煤系多个低渗薄至中厚煤层群中,煤系地温梯度表现为明显正异常,储层压力偏高,煤层含气量整体较高且含气饱和度高,具备良好的煤层气开发条件。综合分析认为,龙潭组9—12号煤组、13—16号煤组为井田煤层气合层开发的2个最有利层段。

Aiming at the characeritc of great oiferences of coalbed methane(CBEM development potential and diffcuity in West Guizhou,this paper atempted toexplore the optimal layer section for CBM commingled development.Eased on the measured data in demonstratio project of CEBM exploration and development in $onghe Mine Fiel.,tis paper analyzed the develogment of feld coal reservoir and the CBM resevir foming characterstics and discusd the opimal paramers pinciples and method of CBM commingled development layer section in cal seams developed area of songhe Mine Fied, and coptimized the develcped layersection bythe fozzy comprehensive evaluationon tis basis.The research showed that the CBMl resouce mainlyocured in the multle low perme ablit oal se ans ith thin to mediumthickness ofLongtan coal measures infe d.The geothemal gradient of coal seres manfested was postive anomaly.T he reservoir rssure wa sightly higherand thecalbed gas content and gas saturation both were relative high. Therefore.the study area had a favorable CEM development condion.The analysis results showed thatthe coal group contained No.9-No.12 seam and the coal group contains No.13-N0.16 seam of Longtan coal measures were most favorable lay rsectins for theCBM commingled development.

国家自然科学基金资助项目(51204162,41272154)；贵州省科技重大专项资助项目(黔科合重大专项字[2014]6002)；