天然气水合物井完井用形状记忆材料研制

A Study on Shape Memory Material for Gas Hydrate Well Completion

为了能够更加有效地解决天然气水合物井在完井过程中的出砂问题,保证天然气水合物井的稳产与高产,开展天然气水合物井完井用形状记忆材料的研制。选用PCL/PM 200体系,采用物理发泡与化学发泡并用的方法,一步法合成了开孔型形状记忆聚氨酯泡沫;在此基础上,对其力学性能、玻璃化转变温度、形状记忆性能、泡孔结构、耐温性能等性能进行了表征与测试。实验测试结果表明,该材料体系合成工艺简单,形状恢复率高,力学性能好,开孔性均匀,耐温性能好,具有玻璃化转变温度,符合温敏型形状记忆材料的变化规律,能够满足天然气水合物完井用形状记忆材料的性能要求。将该体系用于生产天然气水合物井完井用的形状记忆材料,制造形状记忆筛管,为日后天然气水合物的试采和商业开发提供了一种新型的且行之有效的完井手段。

In order to solve the problem of sand production in the process of gas hydrate development more effectively,and ensure the stable and high yield of gas hydrate wells,the development of shape memory polymers for gas hydrate development is carried out.We choose the PCL/PM-200 system to synthesize open cell shape memory polyurethane foam in one step by combining physical foaming and chemical foaming.The shape memory polymers′memory properties,mechanical properties,thermal properties,cell structure properties are characterized and tested.The results show that the foam requires simple processing technology,and is of high shape recovery rate,good mechanical properties,uniform porosity,good temperature resistance and glass transition temperature,which is in line with the change of temperature-sensitive shape memory materials,which can meet the performance requirements of NGH shape memory materials.The system is used to produce shape memory material for gas hydrate development and to manufacture shape memory screen,which provides a new and effective well completion method for gas hydrate test and commercial development in the future.