甘肃省煤层气资源分布特征及勘探开发建议

DISTRIBUTION CHARACTERISTICS OF CBM RESOURCES IN GANSU PROVINCE AND PROPOSALS FOR EXPLORATION AND DEVELOPMENT

甘肃省可采煤层中煤层埋深介于风化带以深、1500m以浅的煤层气资源量较大,而其为5713.00×108m3。而其煤层气资源分布具有地区分布不均衡、资源丰度差异性大及资源总体埋藏较深等特点。采用煤层气有利目标区优选评价体系,优选出了资源展布"小而肥"的靖远宝积山区块这一有利目标区,并对甘肃省煤层气勘探开发前景进行了分析,认为可在宝积山目标区开展煤层气小井组排采试验。

The minable coal seams are buried below the weathered zone with burial depth less than 1500 m in Gansu province and the geologic reserves of CBM are relatively large at 571.3 BCM.The distribution of CBM resources is featured by unevenness among different areas,large difference in abundance of resources,and relatively large burial depth as a whole.The 'small but rich' Baojishan block in Jingyuan region is selected as a favorable target area according to the optimization and assessment system of favorable CBM targets.The potentials of CBM exploration and development in Gansu province are also analyzed.It is proposed to carry out exploitation experiment with small well groups in Baojishan target area.