织纳煤田煤储层弹性能及其对有利选区的控制作用

依据大量的煤田地质资料和实验测试数据,探讨了织纳煤田主要煤层煤储层弹性能在平面及垂向上的分布规律和展布特征。通过对研究区煤层裂隙系统指数（ξ1）、煤层压力系统指数（ξ2）和煤层裂隙开合系数（Δ）3个参数的分析,阐明了煤储层弹性能对煤层气有利选区的控制作用。研究结果表明：织纳煤田主煤层弹性能在平面上呈＂西高东低、南高北低...

Flexibility energy of coal-bed gas reservoir in Zhina coalfield and their control function on the favorable areas

Based on a large number of coal field geological exploration data and the results which were obtained in coal bed methane exploration recently,discussed the distribution rule and characteristic of the flexibility energy in the Zhina coalfield’s main coal seam both laterally and vertically.Through analyzing the three parameters of coal seam fissure system index( ξ 1 ),coal seam pressure system index( ξ 2 )and coal seam fracture opening closing coefficient(Δ),clarified the stratum energy of coal bed gas reservoir and their control function on the favorable areas.The study indicate that on the surface,the distribution pattern of the flexibility energy in the Zhina coalfield’s main coal seam is showed that high in the west and lower in the east,high in the south and lower in the north,significantly high in the southwest;on the vertical direction,the distribution rules is that as the low of coal bed seam,the energy gradually increases.Favorable Δ,favorable ξ 1 and favorable ξ 2 are less than 0.1,more than 2 and more than 0.9,and mainly distributes in Huale Baixing Zhangjiawan Houzhai Zhuzang Pingshang Xinhua,is in the southwest coalfield.It is explained that this area is the favorable area of the coal bed gas’s enrichment and mining in Zhina coalfield has a migration and stress favorable system.