School of Resources and Geosciences,China University of Mining and Technology Engineering and Technology
Branch,CNOOC Energy Technology & Services Limited China United Coalbed Methane Company Limited

在鄂尔多斯盆地东缘临兴地区煤层气资源潜力评价基础上,结合致密砂岩储层高产地质因素及多储层组合类型,探讨煤系地层两类型天然气储层地质特征及组合模式,初步预测资源共采有利区。结果表明,区内构造简单、煤储层稳定、含气量较高、煤岩物性较好,有利于煤层气的富集,且8+9号煤资源潜力优于4+5号煤层,区内北部煤层气资源潜力优于南部;致密砂岩储层主要受控于沉积特征,优质砂岩产层在北部地区相对发育;煤系地层多类型气层具有共采潜力,受控于致密气储层与煤储层空间组合关系,预测区内北部为多储层共采有利区,其中北西方向煤层气资源潜力占优。

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.

国家自然科学基金青年科学基金资助项目(41302131)；