临兴地区煤系地层多类型天然气储层地质条件分析  

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

作　　者：谢英刚[1,2] 孟尚志[3] 万欢[2] 叶建平[3] 潘新志[2] 高丽军[2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]中海油能源发展股份有限公司工程技术分公司,天津300457 [3]中联煤层气有限责任公司,北京100011

出　　处：《煤炭科学技术》2015年第9期71-75,143,共6页Coal Science and Technology

基　　金：国家自然科学基金青年科学基金资助项目(41302131)

摘　　要：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 factors 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 re- sults showed that the structure within the area was simple, the coal reservoir was stable, the gas 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＋9 seams 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 reservoir was mainly controlled by sedimentary features and excellent quality sandstone production layer was relatively developed in the north part area.The multi type gas layer 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 reser- voir co-mining favorable area and the coalbed methane resource potential in the northwest direction would be excellent.

关 键 词：煤系地层 煤层气 致密砂岩气 共采 地质评价 

分 类 号：P618.11[天文地球—矿床学]