煤层气井有杆泵排采临界沉没度的确定  

Determination of the Critical Submergence of Rod Pump for Drainage and Recovery in CBM wells

作　　者：吴建军 王玉斌 綦耀光[2] 吴明杨 孟令鹏 陈凤官[3] 

机构地区：[1]中石油煤层气有限责任公司 [2]中国石油大学(华东)机电工程学院 [3]合肥通用机械研究院

出　　处：《石油机械》2014年第1期97-102,共6页China Petroleum Machinery

基　　金：国家科技重大专项"大型油气田及煤层气开发"之课题"柳林示范区煤层气井高效排采工艺技术研究"(2011ZX05062-004);中央高校基本科研业务费专项基金资助项目(10CX03010A)

摘　　要：为探索煤层气井有杆泵排采合理的临界沉没度,以抽油泵固定阀为研究对象,建立了固定阀运动规律的精确微分方程和固定阀的水力损失数学模型,并利用Simulink建立仿真模型。仿真结果表明,固定阀在开启瞬间产生较大的加速度,产生较高的水力损失,随后固定阀的加速度变小,水力损失变小。以最大水力损失作为泵阀开启的最小条件,进而得到泵的最低沉没度。该项研究结果为提高煤层气产出量提供了重要的理论依据。Abstract. To investigate the proper critical submergence depth of rod pump for drainage and recovery in coalbed methane （CBM） wells, with the standing valve of the pump as the object of study, the precise differential equation on the motion law of standing valve and the mathematical model of the valve＇ s hydraulic loss were established. And the Simulink was used to build the simulation model. The simulation shows that the standing valve produces remark- able acceleration and high hydraulic loss at the opening moment. Then, the acceleration of the valve decreases and the hydraulic loss drops. With the maximum hydraulic loss as the minimum condition for pump valve opening, the minimum pump submergence depth was obtained. The research findings provide an important theoretical basis for improving CBM production.

关 键 词：煤层气 有杆泵 固定阀 沉没度 水力损失 Matlab SIMULINK 仿真 

分 类 号：TF933[冶金工程]