冯常青,刘汉涛,杨宇杰,常建忠,郝春生,季长江

• 1:中北大学能源动力工程学院
• 2:山西晋城无烟煤矿业集团有限责任公司煤与煤层气共采国家重点实验室

摘要(Abstract)：

井内煤粉沉积是造成煤层气(CBM)井下故障的重要原因之一。针对煤层气井筒中由于煤粉沉积所引起的泵的低效率、泄露及卡泵等井下故障,研究了煤粉在煤层气(CBM)井筒中的迁移规律。根据沁水盆地赵庄矿区煤层气井生产条件,建立了抽油杆与油管环空区域内煤粉液相两相流动的瞬态模型,利用FLUENT软件中的欧拉模型对油管中的液固两相流进行了模拟,分析了煤粉颗粒尺寸和井液流速对煤粉排出的影响。模拟结果直观的展示了环空区域内不同时刻煤粉的分布情况,并得到了井筒内煤粉的体积分数随时间的变化规律,确定了最大颗粒尺寸下煤粉排出的临界排水量。研究结果为赵庄矿区煤层气井合理制定排采制度提供了数据基础。

关键词(KeyWords)： 井筒;煤粉;流速;颗粒尺寸;欧拉模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51976203);国家自然科学基金资助项目(51476150)

作者(Author): 冯常青,刘汉涛,杨宇杰,常建忠,郝春生,季长江

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