Assessments on potential resources of deep coalbed methane and compact sandstone gas in Linxing Area

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.