三元复合驱组分协同作用规律研究

三元复合驱中聚合物、碱以及表面活性剂的协同作用能够大幅提高原油采收率,各组分存在的色谱分离会使协同作用大为减弱。通过一维长岩心研究二元/三元体系各组分在线性流过程中吸附规律差异,然后制作二维平面物理模型研究三元复合驱径向流过程中各组分运移规律,判断出三者的协同作用距离,通过数值模拟以及矿场试验结果论证用变浓度多段塞代替单一段塞的可行性。研究表明：三元体系中由于碱的存在可以使超低界面张力保持距离和乳化能力强于二元体系,三元体系一维长岩心的采出程度比二元体系增加了6.32%;三元体系各组分协同作用距离集中在主流线1/2处,各组分运移距离为：聚合物〉碱〉表面活性剂,在后续水驱的过程中表面活性剂存在解...

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Published in中国石油大学学报（自然科学版） Vol. 40; no. 6; pp. 118 - 125
Main Author 刘哲宇 李宜强 王晓光 楼仁贵 余昭艳 田坤
Format Journal Article
LanguageChinese
Published 中国石油大学提高采收率研究院,北京,102249%中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依,834000 2016
Subjects
三元复合驱
乳化
协同距离
多段塞
色谱分离
色谱分离
协同距离
synergy distance
multi-slug
ASP flooding
多段塞
chromatographic separation
emulsion
乳化
三元复合驱
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ISSN1673-5005
DOI10.3969/j.issn.1673-5005.2016.06.015

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Summary:三元复合驱中聚合物、碱以及表面活性剂的协同作用能够大幅提高原油采收率,各组分存在的色谱分离会使协同作用大为减弱。通过一维长岩心研究二元/三元体系各组分在线性流过程中吸附规律差异,然后制作二维平面物理模型研究三元复合驱径向流过程中各组分运移规律,判断出三者的协同作用距离,通过数值模拟以及矿场试验结果论证用变浓度多段塞代替单一段塞的可行性。研究表明：三元体系中由于碱的存在可以使超低界面张力保持距离和乳化能力强于二元体系,三元体系一维长岩心的采出程度比二元体系增加了6.32%;三元体系各组分协同作用距离集中在主流线1/2处,各组分运移距离为：聚合物〉碱〉表面活性剂,在后续水驱的过程中表面活性剂存在解吸附现象;使用变浓度多段塞组合注入,可以在保持相近采收率情况下减少15%的表面活性剂和4.5%的聚合物用量。
Bibliography:ASP flooding;chromatographic separation;synergy distance;emulsion;multi-slug
The synergy effect of polymer, alkali and surfactant in ASP flooding can enhance oil recovery significantly. However, the synergy effect will be receded due to chromatographic separation. The differences of adsorption process in liner flow for different components in SP/ASP systems were investigated using the one-dimensional long core model. And the two-di-mensional physical model was made to study the radial flow regularity of each component during ASP flood. Then, the synergy distance of three components was determined. And the feasibility of using the variable concentration multi-slug to replace the single slug was studied by the numerical simulation and the pilot result. It is found that the distance of ultra-interfacial tension and the stability of emulsion during ASP flood are better than SP flood due to the alkali. The displacement efficient of ASP flooding is 6. 32% higher than that of SP flooding in one-dimensional long core
ISSN:1673-5005
DOI:10.3969/j.issn.1673-5005.2016.06.015