表面扩张模量对泡沫生成的影响
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摘要
通过向起泡剂中加入硬脂酸,构建了高表面扩张模量气泡体系。对比研究了起泡剂溶液的表面扩张模量对搅拌法和多孔介质中气液同注两种泡沫生成方式的影响。结果表明:与常规起泡体系相比,高表面扩张起泡体系通过搅拌法生成的泡沫高度较低,析液半衰期较短,但生成的泡沫粒径小;而对于向多孔介质中同时注入气液生泡方式,高表面扩张模量起泡体系具有生泡速度快,泡沫粒径小,封堵压差高的优点。填砂管驱替实验结果表明:高表面扩张模量起泡体系生成的泡沫具有更好的提高采收率效果。因此,起泡体系的筛选应主要以填砂管中的泡沫评价结果为主。
A foaming system with high surface dilatational modulus was established by adding stearic acid in foaming agents. Aiming at the foam system generated by stirring method and co-injection of gas and liquid, the effect of surface dilatational modulus of foaming agent solution on foam generation was studied. The results showed that compared with common foaming system, via stirring method, the foaming system with high surface dilatational modulus had fewer initial foam volume and shorter liquid drainage half-time, but the generated foam had smaller radius; while the foaming system generated by co-injection of gas and liquid into porous media had advantages of faster foam generation speed, finer foam diameter and higher pressure difference. Oil flooding test results in sandpack showed that foam generated by foaming system with high surface dilatational modulus had better oil recovery effect. Hence,foaming system screening should mainly depend on the evaluation results of foam performance in porous media.
A foaming system with high surface dilatational modulus was established by adding stearic acid in foaming agents. Aiming at the foam system generated by stirring method and co-injection of gas and liquid, the effect of surface dilatational modulus of foaming agent solution on foam generation was studied. The results showed that compared with common foaming system, via stirring method, the foaming system with high surface dilatational modulus had fewer initial foam volume and shorter liquid drainage half-time, but the generated foam had smaller radius; while the foaming system generated by co-injection of gas and liquid into porous media had advantages of faster foam generation speed, finer foam diameter and higher pressure difference. Oil flooding test results in sandpack showed that foam generated by foaming system with high surface dilatational modulus had better oil recovery effect. Hence,foaming system screening should mainly depend on the evaluation results of foam performance in porous media.
引文
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[4]汪成,孙永涛,王少华,等.泡沫调剖辅助多元热流体吞吐研究与应用[J].钻采工艺,2017(1).
[5]许建军.泡沫调剖改善多元热流体开采效果技术研究与应用[J].石油钻采工艺,2015,37(2):114-116.
[6]曹嫣镔,刘冬青,张仲平,等.胜利油田超稠油蒸汽驱汽窜控制技术[J].石油勘探与开发,2012,39(6):739-743.
[7]张玉文,王长权,靳世磊,等.低渗油田氮气泡沫驱注入参数优化研究[J].当代化工,2018,47(12):2576-2579.
[8]孙晶,付美龙,吴海俊,等.理829井区泡沫体系筛选及性能评价[J].当代化工,2018,47(11):2317-2321.
[9]Rio E,Drenckhan W,Salonen A,et al.Unusually stable liquid foams[J].Advances in Colloid&Interface Science,2014,205(12):74-86.
[10]Malysa K,Lunkenheimer K,Miller R,et al.Surface elasticity and frothability of n-octanol and n-octanoic acid solutions[J].Colloids and Surfaces,1981,3(4):329-338.
[11]Huang D D,Nikolov A,Wasan D T.Foams:basic properties with application to porous media[J].Langmuir,1986,2(5):672-677.
[12]Lucassen R.Anionic surfactants:Physical chemistry of surfactan t action[M].New York:Marcel Dekker,1981:212-213.
[13]Bergeron V.Disjoining pressures and film stability of alkyltrime thylammonium bromide foam films[J].Langmuir,1997,13(13):3474-3482.
[14]Vrij A,Overbeek J T G.Rupture of thin liquid films due to s pontaneous fluctuations in thickness[J].Journal of the America n Chemical Society,1968,90(12):3074-3078.
[15]De Vries A J.Foam stability:Part IV.Kinetics and activation energy of film rupture[J].Recueil des travaux chimiques des Pays-Bas,1958,77(4):383-399.
[16]Golemanov K A,Tcholakova S B,Denkov ND C,Ananthapad manabhan KP D,Lips A E.Breakup of Bubbles and Drops in Steadily Sheared Foams and Concentrated Emulsions.Phys Rev E,2008,78:902-904.