关键指标递阶优选法在煤层气有利区优选中的应用OA

The eastern Yunnan region is one of the important enrichment areas of coalbed methane resources in China,especially concentrated in Laochang,Enhong,Xinzhuang,Zhaotong,Agang,Yangchang,Guishan and other mining areas in the eastern Yunnan-Qujing region.The coal seams in these mining areas have strong stability,high gas content,and relatively concentrated resource abundance,demonstrating relatively high resource development potential.For this,a three-level hierarchical optimization system with resource enrichment conditions as the core,desorption and seepage conditions as the secondary,and engineering development conditions as the auxiliary is constructed by studying and adopting the key indicator hierarchical optimization method,the truncated mean of each indicator is used as an objective threshold for dividing the advantages and disadvantages,and each mining area is screened layer by layer.The research results indicate that the resource conditions in Laochang mining area are the most superior,and the area is evaluated as the most favorable area;The comprehensive conditions in Enhong and Agang mining areas are good,and they belong to relatively favorable areas,among them,the development priority in Enhong mining area is slightly higher than that in Agang mining area;Zhaotong mining area has certain development potential and is classified as a generally favorable area;While Guishan,Yangchang,and Xinzhuang mining areas are judged and determined as unfavorable areas due to substandard resource enrichment conditions.This method effectively overcomes the subjectivity problem of artificial weighting in the traditional area selection method,highlights the core position of resource enrichment conditions as a key indicator in decision-making,and is more in line with the area selection logic of actual exploration and development.