SAGD稠油采出液高效分离中YM型破乳剂的合成及性能

doi:10.16085/j.issn.1000-6613.2021-0115

摘要/Abstract

摘要：

以聚醚（YM）、马来酸酐（MA）、对苯乙烯磺酸钠（SSS）和丙烯酰氧乙基三甲基氯化铵（DAC）为原料，合成了YM系列产物，用于新疆油田蒸汽辅助重力泄油（SAGD）稠油采出液的高效分离。通过FTIR、¹H NMR和GPC对合成产物的结构进行表征，并采用界面张力、zeta电位和背散射光强度分析的方法，探究了合成产物对SAGD采出液分离性能的影响。结果表明，YMA和YMB引入的酯基和苯磺酸钠基团可对稠油中沥青质起到分散作用，从而降低界面膜强度和界面张力；YMB引入的酰氧乙基三甲基氯化铵阳离子基团可降低SAGD采出液脱出水zeta电位绝对值；YM系列产物降低了SAGD采出液的稳定性，加入YM、YMA和YMB后，SAGD采出液背散射光强度分别降低了1.36%、4.52%和5.63%，其中YMB降低SAGD采出液稳定性的作用最强。为进一步提升SAGD稠油采出液分离效果，YMB与乙酸复合得到YMC。在优化SAGD采出液分离动态试验条件下，加入YMC能使SAGD采出液分离后达到显著的效果。

关键词: 蒸汽辅助重力泄油, 稠油, 采出液分离, 合成, 界面张力, zeta电位

Abstract:

A series of novel YM demulsifiers, synthesized by polyether（YM）, maleic anhydride（MA）, sodium styrene sulfonate（SSS）, and acryloxyethyltrimethylammonium chloride（DAC）, were applied for SAGD produced liquid separation of Xinjiang heavy oil. The structures of the products were characterized by FTIR、¹H NMR, and GPC. The effect of products on the separation of SAGD produced liquid was investigated by interfacial tension, zeta potential, and backscattered light intensity analysis. The results showed that ester groups and sodium benzenesulfonate anionic groups in YMA and YMB weakened the binding strength between dispersion asphaltenes and reduced interfacial film strength and interfacial tension, which lead to a reduction of oil-water interfacial tension. The cationic group of acyloxyethyltrimethylammonium chloride in YMB dropped the absolute value of zeta potential of SAGD produced water. The backscattered light intensity of SAGD produced liquid decreased by 1.36%, 4.52% and 5.63%, respectively when adding YM, YMA and YMB, which meant YMB demulsifier had the best effect on reducing the stability of SAGD produced liquid. The YMC obtained by the combination of YMB and acetic acid had a better dehydration effect. Under the optimized separation conditions of SAGD produced liquid, a satisfactory separation result could be achieved with the addition of YMC.

Key words: steam assisted gravity drainage（SAGD）, heavy oil, produced liquid separation, synthesis, interfacial tension, zeta potential

中图分类号:

TE624.1

王怿兴, 杨敬一, 胡春付, 徐心茹. SAGD稠油采出液高效分离中YM型破乳剂的合成及性能[J]. 化工进展, 2022, 41(1): 382-390.

WANG Yixing, YANG Jingyi, HU Chunfu, XU Xinru. Synthesis and performance of YM series demulsifiers in high-efficiency separation of SAGD heavy oil production liquid[J]. Chemical Industry and Engineering Progress, 2022, 41(1): 382-390.

图/表 15

图1 SAGD采出液动态分离装置流程图

图2 YM系列产物红外光谱图

图3 YM系列产物核磁共振氢谱图

表1 YM系列产物分子量及分布系数

破乳剂	分子量	PD
YM	2035	1.15
YMA	5235	1.30
YMB	7013	1.80

图4 YM加入量对SAGD采出液脱水效果和界面张力的影响

图5 YMA加入量对SAGD采出液脱水效果和界面张力的影响

图6 YMB加入量对SAGD采出液脱水率及水中含油量的影响

图7 YMB加入量对SAGD采出液脱出水zeta电位的影响

图8 YM系列产物的对SAGD采出液脱水率和水中含油量的比较

表2 YM系列产物随时间增加对SAGD采出液背散射光强度的影响

YM系列产物名称	初始 BS/%	1×10⁴s后BS₁/%	?（BS₁）/%	2×10⁴s后BS₂/%	?（BS₂）/%	3×10⁴s后BS₃/%	?（BS₃）/%
空白	9.80	12.98	-3.18	13.4	-3.60	13.4	-3.58
YM	8.97	8.42	0.55	7.85	1.12	7.61	1.36
YMA	8.64	6.07	2.57	4.8	3.84	4.12	4.52
YMB	8.60	5.43	3.17	3.77	4.83	2.97	5.63

图9 加入YM、YMA和YMB不同时间SAGD采出液背散射光强度的比较

图10 乙酸加入量对SAGD采出液脱水效果及水中含油量的影响

图11 温度对稠油含水量和脱出水中含油量的影响

图12 YMC加入量对稠油含水量和脱出水中含油的影响

图13 停留时间对稠油含水量和脱出水中含油的影响

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