樊庄区块9号煤煤层气开发潜力评价

Study on Exploration Potential Evaluation of Coalbed Methane in No.9 Coal Seam of Fanzhuang Block

在对樊庄区块构造形态、水文地质条件研究基础上,从煤层气富集成藏角度,基于区内测井数据、气测录井数据统计分析及邻区资料调研,对区内9号煤储层物性进行了分析,划分出4个9号煤开发分区。其中分区Ⅲ,9号煤分布稳定450~850m,埋深厚度0.8~1.6m,煤质好,生烃潜力大;区内构造平缓、张性裂隙不发育,顶底板岩性多为泥岩砂岩互层,密封性好,有利于煤层气富集成藏,具备开发潜力。区内9号煤试采效果显示,分区Ⅲ北部9号煤具备1000m^(3)/d生产潜力,南部9号煤具备2000m^(3)/d生产潜力。

By comprehensive analysis of structural characteristics and hydrogeological conditions of Fanzhuang Block,the reservoir physical properties of No.9 Coal Seam in the area are analyzed from the perspective of coalbed methane accumulation and four coal development zones are divided,based on logging data,gas logging data analysis and research data of adjacent areas.No.9 Coal Seam developed stably in zone III,with a stable distribution of 450~850m,and a burial thickness of 0.8~1.6m.It is characterized by good coal quality and great hydrocarbon generation potential.The structural morphology of zone III is gentle and tensile fractures are not developed in the zone.The roof and floor of No.9 Coal Seam are interbedding of sandstone and mudstone in zoneⅢ,which has a good sealing property.It is beneficial to coalbed methane accumulation with exploration potential.The exploitation of No.9 Coal Seam in the region has proved that No.9 Coal Seam in the north of zoneⅢhas a production potential of 1000m^(3)/d,and No.9 Coal Seam in the south has a production potential of 2000m^(3)/d.