Daning-Jixian area,in east margin of Ordos Basin,is rich in deep coalbed methane resources,which is an old coalbed methane exploration and development area of 5 784.175 km2 in China.This article conducts research and analysis on the No.8 coal mine of Benxi formation in the Daning-Jixian area,which is deeply buried within the range of 1 700～2 400 m.It summarizes the characteristics of good reservoir properties and high gas content of deep coal seam sweet spots,describes the influence of coal seam thickness,structure,and hydrodynamics on coalbed methane enrichment,and evaluates the favorable areas for deep coal seam geological engineering based on the comprehensive index of abundance,gas content,and coal seam compressibility.Finally,the favorable areas for geological engineering sweet spots were divided into three categories.
关键词
大宁-吉县地区/深部煤层气/甜点特征/有利区评价
Key words
Daning-Jixian district/deep coalbed methane/sweet spot characteristics/favorable areas evaluation
维普
万方数据