Factors Affecting Measurement of Polyether Amine Content and Elimination Thereof
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摘要: 胺基聚醚作为一种高效抑制剂在钻井液中使用越来越多,但对其在钻井液中的游离含量却无法进行检测,导致配制维护钻井液时确定加量没有依据。研究了胺基聚醚含量测定方法,考察发现钻井液常用处理剂如氢氧化钠、羧甲基纤维素钠盐、磺化酚醛树脂、水解聚丙烯酰胺钾盐等使测定结果高出理论值,研究了干扰因素消除方法。在钻井液中进行验证,测定结果表明,该方法偏差不大于10%,能够较好地满足现场应用。Abstract: Polyether amine is a highly effective shale inhibitor which are more and more widely used in drilling fluids. Since there are no methods of determining the free content of the polyether amine in a drilling fluid, there is no basis for determining the amount of polyether amine when maintaining the properties of the drilling fluid. In laboratory studies, the methods of determining the content of polyether amine in drilling fluids were investigated. It was found that the common drilling fluid additives, such as caustic soda, sodium carboxy methyl cellulose, sulfonated methyl phenolic resin and potassium salts of hydrolyzed polyacrylamide make the measurement results higher than the theoretical value. A method was found able to eliminate the factors interfering the determination of the polyether amine concentration. In verifying the new method in laboratory experiment, it was found that it gave results with errors ≤10%, satisfying the needs of field application.
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Key words:
- Polyether amine /
- Free content /
- Additive /
- Interfere /
- Measurement method
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表 1 处理剂对胺基聚醚含量的影响程度
处理剂 加量/% 偏差/% 处理剂 加量/% 偏差/% NaOH 0.50 +80.0 LV-CMC 1.5 +23 Na2CO3 0.24 +30.0 SMP 3.0 +16 聚合醇 5.00 +2.0 SMC 3.0 +25 铵盐 2.00 +8.5 大钾 0.5 +21 表 2 不同处理剂在20 g/L D230水溶液中的总胺值测定
NaOH/
%实测值/
g·L−1理论值/
g·L−1碳酸钠/
%实测值/
g·L−1理论值/
g·L−10 20.0 20 0 20.0 20 0.1 22.9 20 0.06 23.2 20 0.2 26.1 20 0.18 25.3 20 0.5 35.0 20 0.24 26.1 20 聚合醇/
%实测值/
g·L−1理论值/
g·L−1铵盐/
%实测值/
g·L−1理论值/
g·L−10 20.0 20 0 20.00 20 1 20.3 20 1.0 20.80 20 3 20.3 20 1.5 21.37 20 5 20.4 20 2.0 21.71 20 LV-CMC/
%实测值/
g·L−1理论值/
g·L−1SMP/
%实测值/
g·L−1理论值/
g·L−10 19.9 20 0 20.06 20 0.5 21.4 20 1 20.44 20 1 22.6 20 2 21.59 20 1.5 24.6 20 3 23.27 20 SMC/
%实测值/
g·L−1理论值/
g·L−1大钾/
%实测值/
g·L−1理论值/
g·L−10 20.06 20 0 20.00 20 1 21.20 20 0.1 21.05 20 2 23.11 20 0.3 22.11 20 3 24.91 20 0.5 24.21 20 表 3 处理剂在异丙醇中的溶解性
处理剂 醇洗
现象溶解性 处理剂 醇洗
现象溶解性 D230 无 易溶 SMP 絮状沉淀 不溶 NaOH 白色沉淀 不溶 SMC 黑色絮状沉淀 不溶 Na2CO3 白色沉淀 不溶 大钾 少量溶解 不溶 LV-CMC 白色沉淀 不溶 铵盐 浅褐色浑浊 微溶 表 4 不同处理剂在钻井液中的醇洗效果
处理剂 理论值/
g·L−1醇洗前/
g·L−1醇洗后/
g·L−1洗后偏差/
%0.24%Na2CO3 20.0 26.1 21.0 5.0 1.5%LV-CMC 20.0 24.6 21.5 7.5 3%SMC 20.0 24.9 20.9 4.7 3%SMP 20.0 23.3 21.2 5.9 0.5%大钾 20.0 24.2 21.4 6.9 2%铵盐 20.0 21.7 20.8 4.0 表 5 不同钻井液滤液中的胺基聚醚含量测定结果
试液 消耗盐酸体积/
mLD230/
g·L−1偏差/
%水溶液 6.50 20.0 聚合物钻井液 6.74 20.7 3.7 聚磺钻井液 7.11 21.9 9.4 饱和盐水钻井液 6.76 20.8 4.0 聚合物氯化钾钻井液 7.09 21.8 9.1 -
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