气井分体式柱塞优化设计及实验研究  

Optimal Design and Experimental Study of Split-type Plunger in Gas Well

作　　者：黄伟明 王尊策[1] 张洪涛[1,2,3] 马文海 徐艳[1] 张井龙[1] HUANG Wei-ming;WANG Zun-ce;ZHANG Hong-tao;MA Wen-hai;XU Yan;ZHANG Jing-long(School of Mechanical Science and Engineering,Northeast Petroleum University;Production and Engineering Research Institute of Daqing Oilfield Co.,Ltd;Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation)

机构地区：[1]东北石油大学机械科学与工程学院 [2]大庆油田有限责任公司采油工程研究院 [3]黑龙江省油气藏增产增注重点实验室

出　　处：《化工机械》2020年第5期668-673,共6页Chemical Engineering & Machinery

基　　金：黑龙江省青年科学基金项目(QC2016003);中国石油天然气股份有限公司重大科技专项(2016E-0211)。

摘　　要：柱塞气举是气井排水采气的有效方法,针对传统分体式柱塞下井速度慢、需短时间关井而影响生产效率的问题,以大庆徐深气田工况为例,对分体式柱塞结构进行优化设计,提出基于文丘里管的柱塞空心体内部结构。基于CFD理论,对不同结构参数分体式柱塞进行数值模拟研究,优化确定了收缩角为50°,喉管直径为32mm,扩散角为8°的最优柱塞空心体结构参数。室内验证实验表明,优化后的柱塞其漏失量在1%以下,下井速度明显提高,能够实现不关井连续排液,满足了矿场应用需求。Plunger gas lift is an effective method for water drainage-based gas production.Considering the fact that the traditional split-type plunger is slow in speed and requires well’s shut-in at short time which influencing production efficiency,and through taking working conditions of Xushen gas field in Daqing as an example,the split plunger structure was optimized and a plunger with venture-based internal hollow structure was proposed.Based on the CFD theory,the numerical simulation of the split plunger with different structural parameters was carried out,and the internal structural parameters of the optimal plunger with hollow structure and a shrinkage angle of 50°,a throat diameter of 32mm and a diffusion angle of 8°were optimized and determined.The indoor experiment showed that,the plunger optimized has a leakage loss of less than 1%,and its downhole speed is obviously improved.It can realize continuous drainage without shutting the well and can meet the application requirements of mines.

关 键 词：分体式柱塞 徐深气田 数值模拟 文丘里 连续排液 

分 类 号：TE855[石油与天然气工程—油气储运工程]