水基压裂液体系中交联剂的应用进展

Progress on Cross-linker in Hydro-fracturing Fluid System

本文简述了水基压裂液体系中常用交联剂(无机/有机钛、锆、硼等)的化学结构和性能特点;重点介绍了有机硼交联剂在羟丙基瓜胶水基压裂液体系的交联机理、技术指标和现场应用情况;从交联剂的结构、有机配体的分子组成、交联性能、交联剂制备路线等方面阐释了交联性能是由配位中心的性质、基液pH、配体的配位能力、稠化剂的种类和用量等因素共同决定的。同时回顾了交联剂理论研究进展和现场应用现状,并对水基压裂液交联剂在极端条件、性能指标、复合体系及经济性等应用方向进行了展望。

The chemical structure and performance characteristics of cross-linker agents （inorganic/organic titanium, zirconium, boron, etc.） commonly used in hydro-fracturing fluid system was described, and the cross-linking mechanisms, technical indicators and field applications of organic boron cross-linker in hydro-fracturing fluid system with hydroxypropyl guar gum as the thickener agent was highlighted. Additionally, as for the aspect of the molecular structures, organic-ligand compositions, cross-linking properties, synthetic routes of different cross-linkers, it was explained that the cross-linking properties was codetermined by coordination center, pH of fracture fluid, ligands, thickener type and concentration. In addition, cross-linkers progress on both theory and field applications was mentioned and the applications status in extreme conditions, performance indicators, composite systems and economic in hydro-fracturing fluid was prospected.