煤矿区煤层气抽采效果检测指标及评价

发布时间：2018-11-26 16:34

【摘要】：采用实测和数值模拟方法对晋城矿区地面煤层气抽采效果进行了检测,实测法检测地面抽采5年后煤层气含量由21.58 m3/t降到10.74 m3/t,气含量降低率为50.2%;数值模拟法检测地面抽采5年、10年后井群范围内气含量降低率均值分别为43.3%和58.2%。煤矿井下抽采15.6个月和29.6个月后,实测法检测煤层气含量由抽采前20.1 m3/t分别降低到11.24 m3/t和4.76 m3/t,气含量降低率均值为44.0%和76.3%。根据实测的煤层气含量和储层数值模拟结果,并结合我国煤矿区煤层气抽采的实践经验和相关管理规定,综合考虑煤矿区煤层气抽采的安全和资源效益,提出以煤层气含量和气含量降低率(或采收率)作为煤矿区煤层气抽采效果检测和评价指标,分别建立了煤矿区地面和井下煤层气抽采效果评价方法。
[Abstract]:The extraction effect of surface coalbed methane (CBM) in Jincheng mining area was tested by using the method of actual measurement and numerical simulation. The CBM content decreased from 21.58 m3 / t to 10.74 m3 / t, and the reduction rate of methane content was 50.2% after 5 years of surface extraction. The reduction rate of gas content in well group is 43.3% and 58.2% respectively after 10 years. After 15.6 months and 29.6 months of underground extraction, the measured coal bed methane content decreased from 20.1 m3 / t before extraction to 11.24 m3 / t and 4.76 m3 / t respectively, and the average reduction rate of gas content was 44.0% and 76.3b / t respectively. According to the measured results of coalbed methane content and reservoir numerical simulation, combined with the practical experience and relevant management regulations of coal-bed methane extraction in coal mine area of China, the safety and resource benefit of coal-bed methane extraction in coal mine area are considered synthetically. Taking the coal bed methane content and the reduction rate of the gas content (or recovery factor) as the detection and evaluation indexes of the coalbed methane extraction and production effect in the coal mine area, the evaluation method of the coal bed methane extraction effect in the coal mine area and the underground coal bed methane extraction efficiency are established respectively.
【作者单位】：中煤科工集团西安研究院有限公司;
【基金】：国家自然科学基金资助项目(41202122) 国家科技重大专项资助项目(2011ZX05040-003)
【分类号】：TD712.6

【相似文献】