煤层气有杆泵井排采煤粉产出规律表征与分析  

Characterization and Analysis of Powered Coal Entrainment Law in Drainage Period by Rod Pump for Coal-bed Methane Wells

作　　者：郑春峰[1] 李昂[1] 程心平[1] 赵景辉[1] 

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《科学技术与工程》2015年第28期10-13,38,共5页Science Technology and Engineering

基　　金：中海油能源发展非常规重大专项(HFKJ-CJFZ-1310)资助

摘　　要：为探索煤层气有杆泵井排采煤粉产出的实际沉降速度和临界排液量,建立了有杆泵井井筒煤粉运移动态实验平台,模拟了不同煤粉粒度、不同排液速度井筒煤粉动态运移规律。结合球形颗粒沉降末速理论公式,建立了有杆泵井排采不同煤粉粒度实际沉降速度和临界排液量计算模型。研究表明,实际有杆泵排采实际沉降速度和临界排液量与井液密度、井筒内流体流态、煤粉粒径、煤粉密度及井筒流体流速有关,且随着煤粉粒度的减小实际沉降速度和临界排液量降低,并计算出不同煤粉粒度的排采临界排液量。有杆泵井排采时实际沉降速度和临界排液量可为现场防煤粉控制、排采设备优化等方案设计提供依据。In order to study the critical flowrate and the real terminal velocity of powdered coal entrainment in drainage period by rod pump for coal-bed methane wells,the experiment platform of powdered coal migration in rod pump wellbore was built and the experiment of powdered coal migration law under the condition of different powdered coal size and drainage velocity was simulated. Consider of spherical particle terminal velocity,the calculation method of the critical flowrate of different powdered coal size in drainage period by rod pump was taken. The study shows that,the real terminal velocity and critical flowrate were concerned with fluid density,fluids flow state,powdered coal size,powdered coal density and fluid velocity. With decreasing of powdered coal size,the critical flowrate and the real terminal velocity decrease. The critical flowrate of powdered coal entrainment in drainage period by rod pump under the condition of different powdered coal size was calculated. This study has a great guiding significance on equipment optimization and powdered coal prevention design.

关 键 词：沉降速度 临界排液量 排采 有杆泵 

分 类 号：P618.11[天文地球—矿床学]