摘要
泡排采气工艺因经济高效、施工便捷等优势在国内外各大气田应用广泛,在众多排水采气工艺中扮演主力军角色。为准确揭示泡排井集气管流流型、压降规律及泡沫稳定性,设计加工了一套泡排井集气管流特性模拟实验装置,以含聚合物的气井地层水为介质对其进行可靠性验证。实验选用UT-5D型起泡剂,在气液比0.55~137.42范围内,测试分析起泡剂浓度、起始温度、管径等7个因素影响下的气-液-泡沫多相管流流型、阻力特性及泡沫稳定性。基于相关性和多元回归分析方法,揭示了泡沫高度、压力梯度与各因素的内在关系。结果表明:随气液比增加,管内依次出现液-泡沫分层流、气-泡沫段塞流、气-泡沫波动流、气-泡沫分层流4种流型;气液比、起泡剂浓度和管长对压力梯度和泡沫高度影响显著,其余因素影响均较小,不同因素影响泡沫高度和压降的显著性强弱分别为气液比>起泡剂浓度>管长>温度>弯管>聚合物>管壁粗糙度>管径、气液比>起泡剂浓度>管长>管径>管壁粗糙度>温度>弯管>聚合物;泡沫高度、压力梯度与气液比均表现为强负相关,上述研究可为泡排采气工艺参数优化提供指导。
Foam-drainage gas recovery technology is widely used in various large gas fields at home and abroad due to its advantages of high economic benefits and convenient construction,and plays a major role in many drainage gas recovery technologies.An experimental simulation device for the characteristics of gas gathering pipe flow of foam-drainage gas recovery technology was designed and processed in order to accurately reveal the flow pattern,pressure drop law and foam stability of gas gathering pipe in foam drainage wells.The reliability of the device was verified by using the formation water of gas wells containing polymer as the medium.Using foaming agent UT-5D in the experiments,the influences of seven factors such as foaming agent concentration,initial temperature,pipe diameter,etc.on flow pattern,resistance characteristics and foam stability of gas-liquid-foam multiphase pipe flow were studied in the range of gas-liquid ratio of 0.55~137.42.The internal relationships between foam height,pressure gradient and various factors were revealed based on the correlation and multiple regression analysis.The results show that with the increase of gas-liquid ratio,there are four flow patterns in the tube:liquid-foam stratified flow,gas-foam slug flow,gas-foam fluctuating flow and gas-foam stratified flow.Gas-liquid ratio,foaming agent concentration and tube length have significant effects on pressure gradient and foam height,while other factors have little effect.The influence of various factors on foam height from strong to weak is gas-liquid ratio,foaming agent concentration,pipe length,temperature,elbow,polymer,pipe wall roughness,pipe diameter,and the influence on pressure drop from strong to weak is gas-liquid ratio,foaming agent concentration,pipe length,pipe diameter,pipe wall roughness,temperature,elbow,polymer.The foam height and pressure gradient are strongly negatively correlated with gas-liquid ratio.The research results can provide guidance for the parameter optimization of foam drainage gas recovery technology.
作者
孙杰
崔淑云
冯永振
张家伟
邓家岳
阎晓雨
KARIMOV Rinat M
SUN Jie;CUI Shuyun;FENG Yongzhen;ZHANG Jiawei;DENG Jiayue;YAN Xiaoyu;KARIMOV Rinat M(School of Oil&Natural Gas Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Key Laboratory of Sichuan Province for Oil&Gas Fire Protection,Chengdu,Sichuan 611731,China;Sichuan Shale Gas Exploration and Development Co.,Ltd.,Chengdu,Sichuan 610056,China;Department of Oil and Gas Transport and Storage,Ufa State Petroleum Technological University)
出处
《西安石油大学学报(自然科学版)》
北大核心
2025年第1期79-89,共11页
Journal of Xi’an Shiyou University(Natural Science Edition)
基金
国家自然科学基金“管输热采稠油自生泡沫润滑稳定性及动力学行为研究”(52106208)
四川省自然科学基金“热采稠油集输管道自生泡沫减阻机理研究”(2023NSFSC0924)。
关键词
泡排采气
多相流动
流型
阻力特性
泡沫稳定性
foam-drainage gas recovery
multiphase flow
flow pattern
resistance characteristic
foam stability
作者简介
第一作者:孙杰(1989-),男,博士,研究员,研究方向:油气集输系统多相流。E-mail:sunj101@swpu.edu.cn。
