有机化合物和无机盐对HDD钻遇粘土层的膨胀抑制性研究  

Research on Swelling Inhibition of Organic Compounds and Inorganic Salts on HDD in Drilling Clay Layer

作　　者：朱俊霖[1] 孙平贺[1] Zhu Junlin Sun Pinghe(School of Geosciences and Info-Physics, Central South University, Changsha, 410083)

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083

出　　处：《非开挖技术》2017年第3期14-20,共7页China Trenchless Technology

摘　　要：本文对三种不同的粘土膨胀阳离子抑制剂与含有NaCl和KCl的盐水混合时发生的协同行为进行了评价。这些抑制剂是具有季铵基团的阳离子季铵聚胺氯化物（INIB1）、季铵基团的阳离子聚丙烯酰胺氯化物（INIB2）以及季铵氯化物盐（INIB3）。每种抑制剂的特征考虑了其中氯化物和活性物质的含量。采用膨润土进行测试，使用毛细吸入定时器（CST）和线性膨胀计（LSM）评价在各种流体存在下粘土-水的相互作用。为了更好地解释实验结果，通过响应表面方法（RSM）进行统计分析（DOE-实验设计），同时考虑了抑制剂的不同类型和浓度，盐水的类型和浓度以及抑制剂溶液与粘土的接触时间。实验结果表明：不同的组合抑制效率不同，而且与盐水混合的抑制剂比单独的抑制剂更有效。当具有季铵基团的阳离子聚丙烯酰胺氯化物（INIB2）在18．74lb／bbl的KCl盐水中以7lb／bbl（磅／桶）存在，且盐水和粘土的接触时间为7．6h，能获得最好的实验结果。即含有该组合的溶液对粘土膨胀具有更大的抑制作用。。In this study the synergistic behavior that occurs when three different cationic inhibitors for clay swelling were associated with brines containing NaCI and KCI was evaluated. These commercial inhibitors are based on a cation-ic quaternary polyamine chloride with quaternary ammonium group （INIB 1）, on a cationic polyacrylamide chlo-ride with quaternary ammonium group （INIB 2） and on a quaternary ammonium chloride salt （1NIB 3）. Each inhibitor was characterized considering the amount of chlorides and content of active matter. The tests were per-formed with a commercial bentonite. Capillary suction timer （CST） and linear swell meter （LSM） were used for the evaluation of clay-water interaction in the presence of various fluids. For a better interpretation of the exper-imental results statistical analysis （DOE——design of experiments） via response surface methodology （RSM） was used, taking into account the type and concentration of inhibitors, the type and concentration of brines as well as the contact time of the inhibitor solutions with clay. The results showed different efficiencies, in other words, in-bibitors mixed with brines were more effective than the inhibitors alone. The best results were obtained for cat-ionic polyacrylamide chloride with quaternary ammonium group at 7 lb/bbl （pounds per barrel） in KC1 brine at 18.74 lb/bbl with contact time of brine and clay of 7.6 h. Solutions containing these combinations presented greater inhibition of clay swelling.

关 键 词：粘土膨胀 响应表面 盐水 阳离子抑制剂 

分 类 号：TQ115[化学工程—无机化工]