Analysis on geological conditions of multi type natural gas reservoir in coal measure strata of Linxing Area

Based on potential evaluation on coalbed methane resources in Linxing Area at east edge of Ordos Basin,in combination with high production geological fac tors of tight sandstone reservoir and multi reservoir combined type,the paper discussed geological features and combined modes of two type natural gas reservoirs in coal measure strata.Favorable area for resources co-mining was predicted.The results showed that the structure within the area was simple,the coal reservoir was stable,the ga s bearing was high and the coal and rock physical property was relative good. Thus the area would be favorable to enrichment of coalbed methane.The resources potential of No.8+9seams was better than No.4+5 seams and the coalbed methane resource potential in north part of the area was better than the south part.The tight sandstone res ervoir was mainly controlled by sedimentary features and excellent quality sandstone production layer was relatively developed in the north part area.The multi type gas lay er in the coal measure strata could have co-mining potential and would be controlled by the space combined relationship between tight gas reservoir and coal reservoir.The north part of estimated area would be a multi reservoir c0-mining favorable area and the coalbed methane resource potential in the northwest direction would be excellent.