超高温钻井液体系研究(Ⅰ)——抗高温钻井液处理剂设计思路

Studies on Ultra-High-Temperature Drilling Fluid System (1): Design Ultra-High-Temperature Drilling Fluid Additives

在分析抗高温钻井液处理剂研制的难点及高温对聚合物的要求的基础上,提出了抗高温(≥220℃)聚合物处理剂的分子设计思路,并通过引入主导官能团和非主导官能团的概念,形成了超高温聚合物处理剂的分子设计思路。根据分子设计提出了用自由基聚合合成烯基单体聚合物处理剂(包括降滤失剂、增黏剂、解絮凝剂和分散剂),通过分子的化学修饰合成抗盐抗高温高压降滤失剂,并对合成超高温处理剂原料的选择进行了探讨。

Based on the analysis of difficulties of developing high-temperature drilling fluid additives and polymer requirements due to high temperature, a design of high-temperature （≥220 ℃） polymer additive is proposed. In addition, an ultra-high-temperature polymer molecular design is formed by introducing functional groups and non-dominant concept of functional groups. Alkenyl polymer additives （including fluid loss additive, viscosifier, deflocculant and dispersant） are synthesized by free radical polymerization, and salt-resistant HTHP fluid loss additives are developed by molecules chemically modified synthesis. In the end, selection of raw material of ultra-high-temperature additives is discussed.