XIE Ying-gang MENG Shang-zhi GAO Li-jun SUN Xin-yang DUAN Chang-jiang WANG Hai-ping
Engineering and Technology Branch,CNOOC Energy Technology and Services Limited China United Coalbed
Methane Corporation Limited

针对鄂尔多斯盆地东缘临兴地区主煤层埋深较深、致密砂岩产气层数较多的特点,分析了区内煤储层特征,评价了深部煤层气及致密砂岩气的资源潜力。研究表明,区内构造简单,以单斜构造为主,东中部局部地区发育断裂,煤储层相对稳定,储层压力呈欠压-常压状态,有利于煤层气的富集;深部5号和9号煤层以半亮型的肥煤到焦煤为主,储层物性较好,且9号煤层资源潜力较大,是深部煤层气勘探的主要煤层;致密砂岩展布主要受控于煤系地层沉积特征,在北部地区相对发育。研究认为,该区有利于深部煤系煤层气与致密砂岩气多层共采,而中南部地区为煤层气单采有利区。

According to the deep depth of the main seam in Linxing Area at east edge of Ordos,many gas layers features of the sandstone,the paper analyzed the coal reservoir features within the area and evaluated the potential resources of the deep coalbed methane and the compact sandstone gas.The study showed that the structure within the area was simple and mainly was the monoclinic structure. The development of the structure was broken in the some area of the middle east part,the coal reservoi r was relative stable and the reservoir pressure was in an under-pressure to normal pressure state and was favorable to the enrichment of the coalbed methane.The deep No.5 and No.9 seams were semi-bright type fat coal to coking coal mainly,the reservoir physical property was quite well and the resources potential of No.9 seam was high and was the main seam for the deep coalbed methane exploration.The layout of compact sandstone was controlled by the sedimentary features of the coal measure strata and was relatively developed in the south part.The study held that the area was favorable to the multi layer simultaneous mining of the deep coal measure coalbed methan e and compact sandstone gas and among the area,but the middle and south part could be a favorable zone for a single mining of the coalbed methane.

国家科技重大专项资助项目(2011ZX05062)；