柱塞气举全过程动力学模拟研究  

DYNAMIC SIMULATION STUDY ON PLUNGER LIFT

作　　者：张凤东[1] 李洪建[1] 康毅力[1] 马勇 

机构地区：[1]油气藏地质及开发工程国家重点实验室.西南石油大学 [2]吐哈石油井下技术作业公司

出　　处：《钻采工艺》2007年第5期62-64,共3页Drilling & Production Technology

基　　金：中国石油天然气股份有限公司科技风险创新研究项目;四川省杰出青年学科带头人培养基金项目(07ZQ026-113;02ZQ026-042)

摘　　要：柱塞气举是通过在油管柱内上下循环运动的柱塞把地层产液举出地面的人工举升方法。一个完整的柱塞举升周期由柱塞上行、液段产出、气体放喷及液段再生四个阶段组成。应用质量和动量守恒定律,依据举升中的动力学分析,建立全过程举升动力学模型,能够研究柱塞举升过程中的柱塞位置、速度、加速度、压力、注气量、举升液量、举升周期等参数的变化规律及各参数间的变化关系。通过编制计算机程序,以实例井对模型进行了验证。计算表明所建立的动力学模型能够正确反映柱塞气举的周期特性,从而预测举升过程中各关键参数的变化规律及系统动态特征,为柱塞气举设计提供了新的计算途径。Plunger lift is an artificial lift method by a plunger traveling up and down the tubing to remove these accumulated liquids from the wellbore. A cycle of plunger lift was divided into four continuous stages of upward travel of plunger, slug production, gas blow off, slug regeneration (gas pressure buildup). Using the mass and the momentum conservation law and basing the dynamic analysis of the lifting process, a full term dynamic model was established. By applying the model, the location, velocity, acceleration of the plunger, the pressure, injection gas volume, liquid lift volume, cycle time and the relationship among the parameters can be researched. An illustration has been used for validating the dynamic model with computer program. The full term dynamic simulation can indicate the system dynamic feature, forecast the changing rule of different parameters. An improved design of plunger lift can lead to improve efficiency, increase production and recovery.

关 键 词：人工举升 柱塞气举 动力学模拟 模型方程 全过程 

分 类 号：TE319[石油与天然气工程—油气田开发工程]