Characteristics of Deep Coalbed Methane Sweet Spots and Evaluation of Favorable Areas in Daning-Jixian District
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.
Daning-Jixian districtdeep coalbed methanesweet spot characteristicsfavorable areas evaluation
万方数据
维普
