一种低渗透油田化学复合驱油体系  

A Chemical Composite Oil Displacement System for Low Permeability Oil Fields

作　　者：孟晨光 王科莉 陈国星 林建伟 王大军 魏欣玉 MENG Chengguang;WANG Keli;CHEN Guoxing;LIN Jianwei;WANG Dajun;WEI Xinyu(PetroChina Qinghai Oilfield Company No.4 Oil Production Plant,Mangya Qinghai 816400,China)

机构地区：[1]中国石油青海油田公司采油四厂,青海茫崖816400

出　　处：《当代化工》2024年第9期2040-2044,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:52104011)。

摘　　要：随着低渗透油田开发面临的挑战日益增加,采用有效的提油技术以提高采收率和降低开发成本显得尤为重要。通过实验方法评估了氮气泡沫复合驱油体系在不同地层条件下的泡沫稳定性、流变特性以及驱油效率。实验结果表明:泡沫在25℃和101.325 kPa下的半衰期为88.5 min,而在100℃和1013.25 kPa下显著减少至19.9 min,显示出明显的温度和压力依赖性。泡沫的黏度在剪切速率从0.1 s^(-1)增至10 s^(-1)时,从1.58 Pa·s降至0.82 Pa·s,表明其良好的剪切稀化行为。在驱油效率方面,随着注入压力从101.325 kPa增至1 013.25 kPa,驱油效率从45.5%提升至75.8%。此外,泡沫成分的生物降解速率和毒性测试表明其环境友好性,为油田应用提供了理想的选择。As the challenges faced by the development of low-permeability oil fields increase,it is particularly important to adopt effective oil extraction technology to improve oil recovery and reduce development costs.In this paper,experimental methods were used to evaluate the foam stability,rheological characteristics and oil displacement efficiency of the nitrogen foam composite oil displacement system under different formation conditions.Experimental results showed that the half-life of foam was 88.5 min at 25℃and 101.325 kPa,which was significantly reduced to 19.9 min at 100℃and 1013.25 kPa,showing obvious temperature and pressure dependence.The viscosity of the foam decreased from 1.58 Pa·s to 0.82 Pa·s when the shear rate increased from 0.1 s^(-1) to 10 s^(-1),indicating its good shear thinning behavior.In terms of oil displacement efficiency,as the injection pressure increased from 101.325 kPa to 1013.25 kPa,the oil displacement efficiency increased from 45.5%to 75.8%.In addition,biodegradation rate and toxicity testing of the foam components demonstrated its environmental friendliness,making it ideal for oilfield applications.

关 键 词：低渗透油田 氮气泡沫驱油技术 流变特性 驱油效率 环境友好性 

分 类 号：TQ051.7[化学工程] TE357.4[石油与天然气工程—油气田开发工程]