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首页» 过刊浏览» 2020» Vol.5» Issue(4) 587-596     DOI : 10.3969/j.issn.2096-1693.2020.04.052
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不同烷基链长的聚氧乙烯醚萘类发泡剂合成及性能研究
王洪涛,冯丽娟 ,何萌,张玉珍,郭丹,曾庆桥,杨陆涛,张鲁霞
1 中国石油华北油田公司勘探开发研究院,任丘 062552 2 南京师范大学化学与材料科学学院,南京 210046
Preparation and properties of sodium polyoxyethylene ether naphthalene sulfonate with different chain-length alkyl groups
WANG Hongtao , Feng Lijuan, HE Meng , ZHANG Yuzhen, Guo Dan , ZENG Qingqiao , YANG Lutao , ZHANG Luxia
1 Exploration and Development Research Institute, Huabei Oilfield Company, Petro China, Renqiu 062552, China 2 School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China

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摘要  油田开发后期,为应对含水率大幅上升、油田地质低渗透性、非均质性等问题,油田泡沫驱技术被开发 并逐渐进入现场应用。其中高效泡沫剂是提高采收率和影响泡沫驱油技术成功的关键因素之一。为获得耐油、 耐温且无色谱分离问题的高效泡沫剂,本文以萘、浓硫酸、环氧乙烷为主要原料合成了不同烷基链长的聚氧乙 烯醚萘磺酸钠,探究了疏水碳链长度对烷基聚氧乙烯醚萘磺酸钠性能的影响,并研究了产物的表面张力、乳化 性能、矿化度水中的泡沫性能和室内岩心驱油性能。表面张力研究结果表明:当疏水碳链长度为 10 时,表面 张力较大,而当链长大于 10 时,表面张力差异较小,其中十四碳体系具有最低的表面张力和最小的CMC浓度。 乳化性能结果表明:当碳链长度大于 10 后,化合物具有良好的乳化性能且十四碳体系乳化稳定性最好。泡沫性 能测试结果表明:十四碳体系具有最佳发泡倍率和析液半衰期,其高温泡沫性能最好。本文在上述研究的基础 上,以十四烷基聚氧乙烯醚萘磺酸钠为目标泡沫体系,进一步研究了该体系的抗吸附性能、耐油性能、腐蚀性 以及对目标油藏原油的界面张力及岩心驱替性能,结果表明:十四碳体系具有良好的抗吸附和耐油性能。吸附 前后,发泡体系的泡沫性能未出现明显下降;随着含油量的增加,泡沫性能降低幅度较小。同时,十四碳体系 的腐蚀性能达标,并可以有效降低目标原油的油—水界面张力。最终的室内岩心驱替实验结果显示该泡沫剂提 高采收率达 21.01%,完全满足高温油藏泡沫驱油剂的性能要求。
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关键词 : 聚氧乙烯醚萘磺酸钠;表面张力;乳化性;泡沫性能;抗吸附性能;耐油性能;腐蚀性;界面张力; 驱替能力
Abstract
In the late stage of oilfield development, in order to cope with problems such as a sharp increase in water cut, low oilfield geological permeability, and heterogeneity, oilfield foam flooding technology was developed and gradually entered field applications. A high-efficiency foaming agent is one of the key factors that increases oil recovery and affects the success of foam flooding technology.  This work aimed to prepare high-efficiency, oil-resistant and temperature-resistant foaming agents that can prevent chromatographic separation. We prepared a series of Polyoxyethylene Ether Naphthalene Sulfonates(PENS) by using naphthalene, concentrated sulfuricacid, and ethylene oxide with different chain-length alkyl groups. In addition, we investigated the effect of the chain length of the alkyl groups on the product properties. The surface tension of the product, emulsification performance, foam performance in saline water and laboratory core oil displacement performance are also studied. When the chain length of the linear alkyl group was ten carbons, the surface tension was relatively high; when the chain length was greater than ten carbons, the surface tension between the products was not obviously different. The product with a fourteen-carbon linear alkyl group had the lowest surface tension and the minimum critical micelle concentration. Similarly, emulsifying performance results show that when the chain length was greater than ten carbons, the products had good emulsifying properties. The product with fourteen-carbon linear alkyl group showed the best emulsion stability. The    foam performance test results indicated that the fourteen-carbon system has the best foaming ratio and liquid drainage half-life, so its    high-temperature foam performance is the best. Based on the above findings, we investigated the properties of polyoxyethylene ether    naphthalene sulfonates with fourteen-carbon linear alkyl group (PENS-14C), including adsorption resistance, oil resistance, corrosivity,    interfacial tension with the crude oil of the targeted reservoir, and the laboratory displacement ability in the cores. All the experimental    results demonstrated that PENS-14C had good adsorption resistance and oil resistance. Before and after adsorption, the foam    performance of the foaming system did not decrease significantly; and with an increase in oil content, the decrease of foam performance    was smaller. Meanwhile, its corrosivity also reached the standard. In addition, PENS-14C effectively reduced the oil-water interfacial    tension of the target crude oil. The final laboratory core flooding experiment results showed that the foaming agent can increase the    recovery rate by 21.0   %   , which fully meets the performance requirements of high-temperature reservoir foam oil displacement agents.  


Key words: sodium polyoxyethylene ether naphthalene sulfonate; surface tension; emulsifying; foaming property; adsorption resistance; oil resistance; corrosivity; interfacial tension; displacement ability
收稿日期: 2020-12-30     
PACS:    
基金资助:中国石油天然气股份有限公司重大科技专项项目(2017E-1507) 资助
通讯作者: yjy_wanght@petrochina.com.cn
引用本文:   
WANG Hongtao, Feng Lijuan, HE Meng, ZHANG Yuzhen, Guo Dan, ZENG Qingqiao, YANG Lutao, ZHANG Luxia. Preparation and properties of sodium polyoxyethylene ether naphthalene sulfonate with different chain-length alkyl groups. Petroleum Science Bulletin, 2020, 04: 587-596.
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