摘要
沁水盆地南部以高阶煤储层为主,煤层气勘探与开发资料丰富。利用这些数据资料,采用层次分析、构造解析及盆地分析等方法,分层次探讨了高阶煤层气富集、高产的主控因素及其控气作用机理。研究表明,构造调整、水动力分区及顶、底板岩性分布等控制着煤层气的富集。顶、底板泥岩发育区、水动力滞流区、弱径流区以及构造调整弱或未调整区控制煤层气富集,预测了沁源—安泽、沁南—夏店、马必—郑庄以及柿庄—潘庄4个煤层气富集区。渗透率、构造部位控制煤层气高产,富集区的局部构造高部位埋深较浅的原生高渗带、深部裂隙发育带煤层气易高产,预测了安泽、夏店南部、马必南部、郑庄南部、樊庄中北部和樊庄南部—潘庄6个煤层气高产区。
High-rank coal reservoirs are dominant in the southern Qinshui Basin and there are informative data for CBM exploration and development.Based on the existing data,we hierarchically discussed the major controlling factors and their gas controlling mechanisms on the enrichment and high yield of CBM in the southern Qinshui Basin using analytical hierarchy process,structural analysis,and basin analysis.The results show that the adjustment of geological structure,the zoning of hydrodynamic force,and the lithology distribution of coal seam top and floor primarily control CBM enrichment in the study area.CBM is enriched mainly in the top and floor mudstone development zones,hydrodynamically stagnant and weak runoff zones,and structurally weakly-adjusted or unadjusted zones.Four CBM enrichment zones are predicted in Qinyuan-Anze,Qinnan-Xiadian,Mabi-Zhengzhuang,and Shizhuang Panzhuang regions,respectively.The yield of CBM is mainly controlled by permeability and tectonic position.In CBM enrichment zones,high yield can easily be achieved from local structures such as the original high-permeability zone in the shallow high part and the fracture development zone in the deep strata.Six high-yield regions of CBM are predicted in Anze,south Xiadian,south Mabi,south Zhengzhuang,mid north Fanzhuang,and south Fanzhuang-Panzhuang regions,respectively.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2014年第6期1070-1079,共10页
Acta Petrolei Sinica
基金
国家重大科技专项"大型油气田及煤层气开发"(2011ZX05033
2011ZX05033-001
2011ZX05043-006)资助
关键词
煤层气
富集高产
构造
顶、底板
水动力
coalbed methane
enrichment and high yield
tectonics
coal seam top and floor
hydrodynamic force
