天然气勘探与开发2025，Vol.48Issue(5)：112-122,11.DOI:10.12055/gaskk.issn.1673-3177.2025.05.011
含长碳链凝析油的气井泡排效果主控因素分析与技术对策
Analysis of main controlling factors and technical countermeasures for foam drainage gas recovery in wells with long-carbon-chain condensate:A case study of Dongsheng gas field,Ordos Basin
摘要
Abstract
In order to address the issues of poor performance of foam drainage gas recovery(hereinafter referred to as foam drainage)and frequent liquid loading in multiple gas wells with long-carbon-chain condensate of the Dongsheng gas field in the Ordos Basin,laboratory evaluation experiments were conducted to analyze the main factors controlling the foam drainage effect,and gemini amphoteric oil-resistance foam drainage agent was developed and applied in 10 wells for testing.The following results are obtained.(i)The darker the color of condensate,the higher the content of long-carbon-chain(C10+)components,and the greater the influence on the foam drainage.Conventional foam drainage agents lose all foaming ability in black condensate.(ii)The main factors influencing the foam drainage in oil-bearing gas wells are the long-carbon-chain components and their content in the produced condensate.(iii)Based on the characteristics of condensate and formation water produced in the gas field,a mixed carbon chain of CH14 and CH18(with molar ratio of 8.5:1.5)is selected as the main agent,supplemented with condensate emulsifier to improve the emulsifying capacity of foam drainage system and fluorocarbon surfactant to reduce foam surface tension,and thus a gemini amphoteric foam drainage agent resistant to long-carbon-chain condensate is developed.The laboratory evaluation experimental results suggest that this agent achieves the liquid-carrying rates>80%for various oil-bearing water samples.(iv)Field application tests on 10 wells show that this novel foam drainage agent achieves an effectiveness rate of 90%,with an average production increase of 20%per well.It is concluded that the novel agent effectively overcomes the poor gas recovery performance of conventional agents for wells with long-carbon-chain condensate,providing technical guarantee for stabilizing production of Dongsheng gas field.It can serve as a reference for improving the foam drainage process system of similar oil and gas wells.关键词
凝析油/长碳链组分/双子两性/泡排剂/鄂尔多斯盆地东胜气田/排水采气/携液率/抗油性Key words
Condensate/Long-carbon-chain components/Gemini amphoteric/Foam drainage agent/Dongsheng gas field in the Ordos Basin/Drainage gas recovery/Liquid carrying rate/Oil resistance分类
能源科技引用本文复制引用
孔浩,罗懿,王锦昌,周瑞立,周舰,黄霞..含长碳链凝析油的气井泡排效果主控因素分析与技术对策[J].天然气勘探与开发,2025,48(5):112-122,11.基金项目
中国石油化工集团有限公司科研项目"致密含水气藏采输关键技术及应用"(编号:P23162). （编号:P23162）
