间抽井柱塞运动速度优化模型研究  

Optimization Model of Plunger Motion Velocity in Intermittent Pumping Wells

作　　者：刘洪斌[1] 孙浩宾 罗伟 Liu Hongbin;Sun Haobin;Luo Wei(School of Mechanical Engineering,Southwest Petroleum University)

机构地区：[1]西南石油大学机电工程学院

出　　处：《石油机械》2023年第4期105-111,共7页China Petroleum Machinery

基　　金：中国石油化工集团有限公司科研项目“机抽井智能举升技术开发与应用”(P20068-5)。

摘　　要：针对我国低产油井普遍产量低、泵效低,油井抽油生产时泵充不满的问题,开采现场常采用间抽的方式以提高泵效;然而当前间抽制度的研究普遍以冲次和间抽周期为优化变量,很少有将间抽周期、冲次和柱塞运动速度三者相结合的研究。以提高泵效为生产要求,提出了间抽井柱塞运动速度优化模型,模型根据抽油机井的开采利润和最大系统效率确定合理动液面区间,用傅里叶级数构造柱塞运动速度函数,利用遗传退火算法优化傅里叶系数及频率来达到改变冲次和柱塞速度的目的。研究及试验结果表明,在此方案下,低产油井的工作时间缩短,泵效增幅明显,油井综合效益显著提高。研究结论可为低产油井的柔性控制策略提供较好的工程参考。In China, low-yield wells are commonly characterized by low production and low pump efficiency, pumping is insufficient during well production, and intermittent pumping is often adopted to improve the pump efficiency.However, the current research on the intermittent pumping system generally takes the strokes and intermittent pumping cycle as the optimization variables, and there are few reports on the combination of intermittent pumping cycle, strokes and plunger motion velocity.In order to improve the pump efficiency, an optimization model of plunger motion velocity in intermittent pumping wells was built, which determined the reasonable producing fluid level interval based on the exploitation profit and the maximum system efficiency of the pumping well, used the Fourier series to construct the function of plunger motion velocity, and used the genetic annealing algorithm to optimize the Fourier coefficient and frequency, so as to achieve the objective of changing the strokes and plunger motion velocity.The study and test results show that under this scheme, the working time of low-yield wells is shortened, the pump efficiency is significantly increased, and the overall benefits are remarkably improved.The conclusions provide a good engineering reference for the flexible control strategy of low-yield wells.

关 键 词：低产低效井 间抽生产 沉没度 泵效 优化设计 

分 类 号：TE355[石油与天然气工程—油气田开发工程]