CN101112662B - 复配型三元复合驱采出液破乳剂 - Google Patents

复配型三元复合驱采出液破乳剂 Download PDF

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CN101112662B
CN101112662B CN2007101180942A CN200710118094A CN101112662B CN 101112662 B CN101112662 B CN 101112662B CN 2007101180942 A CN2007101180942 A CN 2007101180942A CN 200710118094 A CN200710118094 A CN 200710118094A CN 101112662 B CN101112662 B CN 101112662B
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高雁鸣
刘兴玉
张庆生
龚淑楠
高景熙
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Daqing demeitel Technology Co., Ltd.
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Dafeng Oil Field Tech Co Ltd Daqing
WANAOPU (BEIJING) PETROLEUM ENGINEERING TECHNOLOGY DEVELOPMENT RESEARCH INSTITUTE Co Ltd
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Abstract

本发明公开了一种复配型三元复合驱采出液破乳剂，该破乳剂由功能破乳剂和混合溶剂组成，功能破乳剂组分质量分数百分比配比为70-30％，混合溶剂组分质量分数百分比配比为30-70％；功能破乳剂按质量分数百分比记，由35-70％的多亚乙基多胺聚氧丙烯聚氧乙烯醚和30-65％的丙二醇聚氧丙烯聚氧乙烯醚混合而成；混合溶剂采用二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的一种或几种或其与水的混合溶液。与已有技术相比，本发明破乳剂具有脱水率高、脱水速度快、油水界面齐的优点，采出液破乳后污水中含油量小于200mg/L，油中含水量小于8％，使采出液油水分离的效果远远好于对比破乳剂，是一种处理三元复合驱采出液较好的复配型破乳剂。

Description

复配型三元复合驱采出液破乳剂
技术领域
本发明涉及一种用于油田采油厂三元复合驱采出液油水分离用的复配型破乳剂。
背景技术
一些油田已经进行三元复合驱采油，随着采油时间的延长，采出液中返出的表面活性剂、碱和聚合物的含量越来越高，造成采出液油水乳化越来越严重，油水乳状液破乳的难度也越来越大，原来使用的破乳剂已经不能适应采出液中三元化学剂返出增加的场合，采出液经破乳后从游离水脱出器出来的污水经常超出含油量1000mg/L的指标，油中含水量超出20％(质量分数)的指标。由于从游离水脱出器出来的污水含油量严重超标，从而造成污水经污水处理单元处理后水中含油量也严重超标；另外，从游离水脱出器出来的油中含水量较高，导致电脱水操作单元中电脱水器平稳性变差，经常出现垮电场现象。进行三元复合驱采出液处理的单位急需要能够适应三元化学剂含量高的采出液破乳的破乳剂，不仅使三元复合驱采出液处理合格，并且采出液油水分离后水中含油量和油中含水量越少越好，减轻污水处理单元和电脱水处理单元的压力。目前还没有专门用于处理三元复合驱采出液的破乳剂，使用的破乳剂多数是单一品种的破乳剂，如处理含油污水使用的SP169破乳剂，这些破乳剂用于处理三元复合驱采出液效果都比较差，而两种不同性质的破乳剂复配，可起协同作用，不仅有可能使水中含油量和油中含水量达到指标要求，而且有可能比指标还要低很多。
发明内容
本发明所要解决的技术问题在于克服现有破乳剂处理三元复合驱采出液效果不佳的缺陷，提供一种复配型三元复合驱采出液油水分离破乳剂，利用该破乳液可实现三元复合驱采出液油水分离后，水中含油量小于200mg/L，油中含水量小于8％(质量分数)的指标。
本发明为解决其技术问题所采取的技术方案是：
一种复配型三元复合驱采出液破乳剂，该破乳剂由功能破乳剂和混合溶剂组成，功能破乳剂组分质量分数百分比配比为70-30％，混合溶剂组分质量分数百分比配比为30-70％；所述功能破乳剂为多亚乙基多胺聚氧丙烯聚氧乙烯醚和丙二醇聚氧丙烯聚氧乙烯醚的混合液，其质量分数百分比配比为多亚乙基多胺聚氧丙烯聚氧乙烯醚35-70％，丙二醇聚氧丙烯聚氧乙烯醚30-65％；所述混合溶剂采用二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的一种或几种，或二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的一种或几种与水的混合溶液。
进一步，所述混合溶剂采用乙基苯、混合苯、甲醇、异丙醇，各溶剂质量分数百分比配比为乙基苯10-30％，混合苯15-40％，甲醇10-40％，异丙醇5-20％，水5-20％。
进一步，所述混合溶剂采用二甲苯、甲醇、异丙醇，各溶剂的质量分数百分比配比为二甲苯10-40％，甲醇10-40％，异丙醇5-20％，水5-20％。
上述功能破乳剂的规格：多亚乙基多胺聚氧丙烯聚氧乙烯醚的平均分子量为5000-8000，固含量大于65％，丙二醇聚氧丙烯聚氧乙烯醚的平均分子量为3000-5000，固含量大于65％。
本发明与已有技术相比具有脱水率高、脱水速度快、油水界面齐的优点，三元复合驱采出液破乳后污水中含油量小于200mg/L，油中含水量小于8％，使采出液油水分离的效果远远好于对比破乳剂，远远达到采出液分离后污水含油量小于1000mg/L和油中含水量小于20％的指标，是一种处理三元复合驱采出液较好的复配型破乳剂。
具体实施方式
复配型三元复合驱采出液破乳剂的制备方法：
按质量分数百分比35-70％取多亚乙基多胺聚氧丙烯聚氧乙烯醚，质量分数百分比30-65％取丙二醇聚氧丙烯聚氧乙烯醚，将二者混合制成功能破乳剂；
取二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的一种或几种，或二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的一种或几种与水的混合溶液，作为混合溶剂；
按质量分数百分比配比70-30％取上述制备的功能破乳剂，按质量分数百分比配比30-70％取上述选用的混合溶剂，将二者混合均匀，即得到本发明产品。
上述破乳剂的复配工艺在带有夹套保温的搅拌釜中进行，控制条件为：复配混合温度20-50℃，搅拌转速30-150r/min，搅拌时间20-50min，放料温度20-40℃。
在选取混合溶剂时，既可选用二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的一种，也可选用其中的几种混合后作为混合溶剂，也可选用二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的一种或几种与水混合后作为混合溶剂使用。采用混合溶剂，使多亚乙基多胺聚氧丙烯聚氧乙烯醚破乳剂和丙二醇聚氧丙烯聚氧乙烯醚破乳剂能很好相溶，使破乳剂在三元复合驱采出液中迅速分散。组成混合溶剂的配比原则是混合溶剂能使功能破乳剂很好相溶，制成的破乳剂凝点低，混合溶剂价廉。
如采用乙基苯、混合苯、甲醇、异丙醇与水的混合溶液作为混合溶剂时，各溶剂质量分数百分比配比为乙基苯10-30％，混合苯15-40％，甲醇10-40％，异丙醇5-20％，水5-20％。
如采用二甲苯、甲醇、异丙醇与水的混合溶液作为混合溶剂时，各溶剂的质量分数百分比配比为二甲苯10-40％，甲醇10-40％，异丙醇5-20％，水5-20％。
本发明的复配型破乳剂对三元复合驱采出液残留聚合物、表面活性剂、碱含量低的采出液处理效果：在三元复合驱采出液中含有聚丙烯酰胺126mg/L、表面活性剂25mg/L、碱860mg/L、pH值9.4、水相粘度2.0mpa.s(45℃)、不加药剂时，水中含油量1800mg/L应用本实施例生产的复配型三元复合驱采出液油水分离破乳剂进行油水分离处理。复配型三元复合驱采出液油水分离破乳剂加量在20-35mg/L时，采出液油水分离后水中含油量小于100mg/L，油中含水量小于3％。
发明的复配型破乳剂对三元复合驱采出液残留聚合物、表面活性剂、碱含量较高的采出液处理效果：三元复合驱采出液的性质：聚丙烯酰胺含量195.8mg/L，表面活性剂含量49.2mg/L，碱含量：OH-311mg/L，CO3 2-含量1248mg/L，HCO3 -含量2421mg/L，含水率82.2％，pH值9.4，水相粘度2.1mpa.s(45℃)，不加药剂时，水中含油量2166mg/L。复配型三元复合驱采出液油水分离破乳剂加量在20-35mg/L时，采出液油水分离后水中含油量小于150mg/L，油中含水量小于5％。
复配型三元复合驱采出液破乳剂远远优于普通破乳剂，使三元复合驱采出液油水分离后污水中含油量和油中含水率均达到指标要求，可使污水中含油量从2166mg/L以上降低到150mg/L以下。

Claims (3)

1.一种复配型三元复合驱采出液破乳剂，其特征在于，所述破乳剂由功能破乳剂和混合溶剂组成，功能破乳剂组分质量分数百分比配比为70-30％，混合溶剂组分质量分数百分比配比为30-70％；所述功能破乳剂为多亚乙基多胺聚氧丙烯聚氧乙烯醚和丙二醇聚氧丙烯聚氧乙烯醚的混合液，其质量分数百分比配比为多亚乙基多胺聚氧丙烯聚氧乙烯醚35-70％，丙二醇聚氧丙烯聚氧乙烯醚30-65％；所述混合溶剂采用二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的几种，或二甲苯、乙基苯、混合苯、溶剂油、甲醇、异丙醇中的几种与水的混合溶液。
2.如权利要求1所述的复配型三元复合驱采出液破乳剂，其特征在于，所述混合溶剂采用乙基苯、混合苯、甲醇、异丙醇，各溶剂质量分数百分比配比为乙基苯10-30％，混合苯15-40％，甲醇10-40％，异丙醇5-20％，水5-20％。
3.如权利要求1所述的复配型三元复合驱采出液破乳剂，其特征在于，多亚乙基多胺聚氧丙烯聚氧乙烯醚的平均分子量为5000-8000，丙二醇聚氧丙烯聚氧乙烯醚的平均分子量为3000-5000。
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