煤层气储层“三品质”测井定量评价方法研究——以鄂尔多斯盆地东缘韩城矿区为例  

Study on the Method of Quantitative Evaluation for “Three Qualities” of CBM Reservoir Using Logging Data:A Case Study from the Hancheng Mine at the Eastern Edge of the Ordos Basin

作　　者：刘之的[1] 赵靖舟[1] 时保宏[1] 耳闯[1] 侯淞译 王剑[1] 

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]中石油煤层气有限责任公司,北京100028

出　　处：《天然气地球科学》2015年第5期966-978,共13页Natural Gas Geoscience

基　　金：陕西省教育厅重点实验室科学研究计划项目"特低渗透储层物性地质效应及动用下限确定方法研究"(编号:14JS082);陕西省自然科学基础研究计划项目"煤层气水平井测井响应反演方法研究"(编号:2013JQ5008);西安石油大学博士科研启动项目"煤层气测井评价方法研究"(编号:2014BS22)联合资助

摘　　要：煤层气储层品质、顶底板封盖品质及完井品质("三品质")对煤层气的富集高产起决定作用。充分利用测井、煤岩心化验分析等资料,在详细探讨了煤层气储层"三品质"各个主控因素的测井评价方法之后,采用有机融合各主控因素的手段建立了煤层气储层"三品质"的定量评价方法,并以此方法对研究区煤层气储层的"三品质"展开了定量评价。研究表明:所提出的一整套方法能够有效地对煤层气储层的"三品质"进行定量评价,评价结果与煤岩心分析化验、压裂动态排采基本一致;11#煤层气储层,中部区域的储层品质明显好于东北部、西南部,东北部又略好于西南部;整体上,11#煤层顶底板的封盖品质好,封闭类型以Ⅰ类、Ⅱ类为主,封盖品质好的区域位于研究区中部,较差的区域位于研究区东北部和西南部;脆性指数大、煤层及其顶底板应力差大、煤层应力差异系数小,且煤体结构指数高的煤层,可压裂性强,压裂排采后产能见效显著。煤层气井要获得稳定高产,不仅要具备良好的储层品质和顶底板封盖品质,压裂层段的完井品质也是不容忽视的重要因素。For the CBM enrichment and high yield,the reservoir quality,sealing quality of roof and floor and completion quality（three qualities）play a decisive role.According to the log,laboratory analytical data of coal core,logging evaluation methods for main controlling factors of＂three qualities＂in CBM reservoir are discussed in detail.The quantitative evaluation methods of＂three qualities＂are established by the main controlling factors of organic fusion mean.Based on these methods,＂three qualities＂of CBM reservoir in the study area are carried out through quantitative evaluation.The results show that those methods can evaluate＂three qualities＂of CBM reservoir quantitatively and effectively.The evaluation results are closely consistent with the tests of laboratory analysis and fracturing dynamic drainage results.For the 11^#CBM reservoir,the reservoir quality of the central area is much better than that in the northeast and southwest,the one in the northeast is slightly better than the southwest;Overall,the sealing quality of roof and floor block of the 11^#coal seam is good.The sealing types are mainly Ⅰ,Ⅱ,the area with good sealing quality locates in the middle of the study area,the poor area locates in the northeast and southwest of the study area;The greater the brittleness index and the stress difference between coal seam and its roof and floor,the smaller the difference coefficient of coal seam stress,and the higher the coal structure index.Then the fracturing of coal seam is strong,the productivity effect is remarkable after fracturing drainage.To obtain highyield in CBM wells,it requires not only good reservoir quality and sealing quality of roof and floor block,but also the completion quality of fracturing zone,which is an important factor that cannot be ignored.

关 键 词：储层品质 封盖品质 完井品质 定量评价 测井 煤层气 

分 类 号：TE122.2[石油与天然气工程—油气勘探]