耐盐表面活性剂热稳定性及其在固液界面吸附规律研究
发布时间：2018-10-08 17:17
【摘要】：针对在高温、高盐油藏条件下表面活性剂的使用,本文研究了烷基酚聚氧乙烯醚羧酸盐和甜菜碱型表面活性剂的相关性能。以烷基酚聚氧乙烯醚和氯乙酸酯为原料,合成了烷基酚聚氧乙烯醚羧酸盐。用高效液相色谱测定产品收率,确定合成条件为:在40℃下钠化反应1h,在65℃~70℃之间滴加氯乙酸酯并反应6h左右,各反应物摩尔比例为NP-7:NaOH:ClCH2COOR=1:2.2:1.2。130℃条件下,合成的烷基酚聚氧乙烯醚羧酸盐在pH值为5和7的高矿化度模拟地层水中有较好的热稳定性;而pH值为11时其热稳定性明显下降。建立了高效液相色谱法(HPLC)测定长碳链羧基甜菜碱浓度的方法:示差折光检测器RID-10A;色谱柱为SHIM-PACK VP-ODS C18反相色谱柱(4.6mm×250mm);流动相为甲醇:水=80:20~70:30,柱温40℃,流速1.0mL/min,进样量20μL。以此为基础,评价了十二烷基二甲基羧基甜菜碱(CBET-12)的热稳定性,并和十二烷基三甲基氯化铵(1231)进行了比较。结果表明,130℃时在不同酸碱性与矿化度条件下二者都有着较好的热稳定性。另外,论文还研究了十二烷基二甲基羧基甜菜碱(CBET-12)在碳酸盐岩表面上吸附性能。结果表明,在zeta电位显示为负电的碳酸盐岩表面,其吸附量随着NaCl含量的增大而略有增大;而在不同浓度CaCl2溶液中,吸附量都在4.0mg/g以上,接近于NaCl溶液吸附量的2倍。
[Abstract]:The properties of alkylphenol polyoxyethylene ether carboxylate and betaine type surfactants were studied for the use of surfactants in high temperature and high salt reservoirs. Alkylphenol polyoxyethylene ether carboxylate was synthesized from alkylphenol polyoxyethylene ether and chloroacetate. The yield of the product was determined by high performance liquid chromatography (HPLC). The synthetic conditions were determined as follows: sodium reaction at 40 鈩，
本文编号：2257615
[Abstract]:The properties of alkylphenol polyoxyethylene ether carboxylate and betaine type surfactants were studied for the use of surfactants in high temperature and high salt reservoirs. Alkylphenol polyoxyethylene ether carboxylate was synthesized from alkylphenol polyoxyethylene ether and chloroacetate. The yield of the product was determined by high performance liquid chromatography (HPLC). The synthetic conditions were determined as follows: sodium reaction at 40 鈩，
本文编号：2257615
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