聚胺与氯化钾抑制性的对比实验研究

近年来开发出的聚胺水基钻井液，被认为是最接近逆乳化钻井液性能的高性能水基钻井液。新型聚胺强页岩抑制剂也因其分子结构独特、抑制性能突出越来越受到人们重视。通过抑制膨润土造浆实验、屈曲硬度实验、页岩滚动分散实验、耐崩散实验、页岩膨胀实验以及X 射线衍射粘土层间距分析等实验手段，对比评价了聚胺强页岩抑制剂与传统常用抑制剂氯化钾的抑制性。结果表明，与氯化钾相比，聚胺抑制性能优异，能有效抑制粘土水化分散，在加量较少时即能发挥长期抑制作用，且具有较好的抗温性能。配伍性实验表明，聚胺与膨润土及常用处理剂具有较好的配伍性。以SDA 为主要水化抑制剂构建了聚胺水基钻井液，实验评价表明，该体系具有优良的抗盐、抗钙和抗劣土污染性能。此外，对聚胺的抑制机理进行了探讨分析。

Experimental Study of the Shale Inhibition Between Polyamine andPotassium Chloride

Polyamine water-based drilling fluid is considered to be of high performance and most close to the propertiesof water-based invert emulsion mud developed in recent years. Because of the unique molecular structure and outstandinginhibition，the new polyamine shale inhibitor has been showing more and more attention. The inhibitive properties betweenpolyamine and potassium chloride are evaluated by bentonite inhibition test，buckle hardness test，shale hot-rolling dispersiontest，slake durability test，shale linear swelling test and the interlayer spacing measurement and so on. The results indicate that，compared to potassium chloride，polyamine can suppress clay hydration and dispersion with low concentration but long effect.Also polyamine exhibits high temperature resistance. Compatibility tests indicate that polyamine is compatible with bentoniteand common additives. Based on SDA，polyamine water-based drilling fluid is developed. The experiments demonstrate thatthe system shows high performance of anti-salt，anti-calcium and anti-cuttings pollution.