寺河井田3号煤层人工压裂裂缝形态特征研究  

Study on Morphological Characteristics of Artificial Fracturing Cracks in the No.3 Coal Seam of Sihe Mine Field

作　　者：贾波 JIA Bo(Shanxi Blue Flame CBM Group Co.,Ltd.,Jincheng 048006,China)

机构地区：[1]山西蓝焰煤层气集团有限责任公司

出　　处：《煤》2020年第1期5-8,共4页Coal

基　　金：2014年度山西省煤基重点科技攻关(煤层气产业链)项目(MQ2014-05)

摘　　要：裂缝形态特征是储层压裂改造效果评价、压裂工程设计及优化、煤层气井井网布置及优化等的重要研究内容。为摸清寺河井田3号煤层气主力开发煤层人工压裂裂缝形态特征,对井田内微地震裂缝监测资料进行了研究。结果表明:浅埋深、厚煤层、中小型压裂规模及中小排量压裂情况下,裂缝长度171.3~284.2 m,平均219.7 m;裂缝高度13.3~16.5 m,平均14.9 m;裂缝方位为北东42.5~47.9°,平均45.9°;受煤的非均质性和应力状态影响,在压裂规模及压裂参数相近的情况下,各压裂井的裂缝形态特征有所不同。The seam shape characteristics are important research contents such as evaluation of reservoir fracturing effect,design and optimization of fracturing engineering,layout and optimization of coalbed methane well network.In order to find out the morphological characteristics of the artificial fracture of the coal seam in the main force of the No.3 coalbed methane in Sihe coal field,the microseismic crack monitoring data in the minefield was studied.The research shows that under shallow buried depth,thick coal seam,small and medium scale fracturing scale and medium and small displacement fracturing,the crack length is 171.3~284.2 m with an average of 219.7 m.The crack height is 13.3~16.5 m with an average of 14.9 m.The crack orientation is 42.5~47.9°in the northeast with an average of 45.9°.Influenced by the heterogeneity and stress state of coal,the fracture morphology characteristics of each fractured well are different under the similar conditions of fracturing scale and fracturing parameters.

关 键 词：寺河井田 3号煤层 微地震监测 裂缝形态特征 

分 类 号：TD327[矿业工程—矿井建设]