聚氧乙烯烷基酚醚羧甲基盐耐盐耐硬性能的考察

STUDY ON THE TOLERENT PROPERTIES OF HIGH SALINITY AND HARDNESS IONS FOR SODIUM ETHOXYLATED ALKYLPHENOL CARBOXYMETHYL ETHER

针对高矿化度油藏条件状况，结合表面活性剂－碱剂－聚合物三元复合化学驱油体系及活性水驱的开发，考察了聚氧乙烯烷基酚醚羧甲基钠盐（ＡＰＣ（Ｎａ）－ｎ）的耐盐耐硬性能，重点考察了ＡＰＣ（Ｎａ）－２与碱剂复配时的耐盐耐硬性能，且与石油磺酸盐ＴＲＳ－４０作了比较。结果表明，ＡＰＣ（Ｎａ）－ｎ具有优良的耐盐耐硬性能，可望用于高矿化度油藏条件下的化学驱油。ＡＰＣ（Ｎａ）－２与ＮａＯＨ复配产生协合效应，使耐Ｃａ￣（２＋）、Ｍｇ￣（２＋）性能显著提高，对ｃａ￣（２＋）、Ｍｇ￣（２＋）的耐受能力已可满足实际油藏硬度条件的要求。ＡＰＣ（Ｎａ）－２与Ｎａ＿２ＣＯ＿３的复配对Ｃａ￣（２＋）和Ｍｇ￣（２＋）耐受性能影响不大，而复配Ｎａ＿２ＳｉＯ＿３则使耐Ｃａ￣（２＋）和Ｍｇ￣（２＋）性能显著下降，实验中还发现，同号无机离子对羧酸盐型活性剂的胶束性质存在影响。

This paper studies dilute systems of sodium ethoxylated alkylphenolcarboxymethyl ether(APC (Na)-n) and combination flood system of APC(Na)-2 with variousalkalines tolerent of high salinity and hardness based on the study of both combination floodsystems composed of surfactant, polymer and alkaline and surfactant flood used in highsalinity reservoirs.These properties are compared with those of petroleum sulfonat(TRS-40).It was found that APC(Na)-n with excellent tolerence of high salinity and hardnesscan be applied to chemical flood in the reservoirs with high salinity. Hardness ions toleranceof APC(Na)-2 increases noticeably with the addition of NaOH, which can be satisfied for theconditions of real reservoirs, but decreases with the addition of Na2SiO3 and merely no goodeffect with Na2CO3. It also found that similar charge of inorganic ions addited to carboxylatesurfactant act on the properties of micelle.