聚胺抑制剂的测定方法及最佳用量的确定

目前,聚胺作为一种水基钻井液用高效抑制剂得到广泛应用,但对它的研究还主要集中在抑制性评价和现场应用效果中。为此探索研究了聚胺抑制剂含量的测定方法,采用四苯硼钠法进行游离聚胺（FYZ-1）含量测定,通过对指示剂、沉淀条件、滴定条件、pH值调节剂等实验条件的优化,确定了测定方法,并进行岩屑对聚胺含量影响实验。结果表明,碳质泥岩、易水化泥岩、硬脆性泥岩、砂岩对聚胺吸附依次降低,据此可以推荐聚胺在不同地层的加量并指导现场应用。 

Ploya mine Shale Inhibitor Content Measurement and Determination of Optimum Dosage

As a high performance shale inhibitor, polyamine has found a wide application in drilling with water base drilling fluids. Studies on polyamine were primarily focused on the inhibitive capacity and field application, and no technical specifications of polyamine have been established. A method of measuring the content of polyamine is discussed in this paper. Using the "sodium tetraphenylborate method", the content of a free polyamine, FYZ-1, was measured. The measuring method has been determined through the optimization of the testing conditions, such as indicators, precipitation conditions, titration conditions, pH values, etc. The effect of drill cuttings on the content of polyamine has also been studied. It has been founded in laboratory experiments that the quantities of the adsorbed polyamine on carbonaceous shale, hydratable shale, brittle shale and sandstone are decreasing in that order. This finding can be used to determine the concentrations of polyamine in drilling fluids in field operations.