超临界二氧化碳-聚合物体系浊点压力的光敏法测量  

Measurement of the cloud-point pressures of supercritical carbon dioxide-polymer systems by photosensitive method

作　　者：朱腾 宫厚健[1] 李亚军[1] 董明哲[1] 郭春清 李卫卫 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]科尔加里国际油气技术有限公司,北京100123

出　　处：《中国科技论文》2016年第21期2514-2518,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(51204197);中国石油大学(华东)自主创新科研计划项目(15CX06033A)

摘　　要：超临界二氧化碳-聚合物体系的浊点压力是评价聚合物类二氧化碳压裂液增黏剂性能的重要参数。使用自主研发的超临界二氧化碳相平衡装置,采用根据光敏原理改进的浊点压力法,测定了3种亲二氧化碳聚合物增黏剂PCA、PCB和PCC在超临界二氧化碳中的电阻-压力曲线,得到了3种聚合物的浊点压力。实验结果表明:聚合物PCA和PCB的浊点压力低于PCC;3种聚合物的浊点压力随着聚合物相对分子质量和聚合物质量分数的增大而增大,随着助溶剂CS质量分数的增大而减小,随着温度的升高而增大。在35℃时,PCA和PCB均能用作超临界二氧化碳压裂液增黏剂,在55℃时PCB的效果更佳。采用光敏法可以准确地测量超临界流体体系的浊点压力,对同类实验具有借鉴意义。The cloud-point pressure of the supercritical carbon dioxide-polymer system is an important parameter for the evaluation on the CO2-philie polymer tackifier properties in the CO2-based fracture fluids. Utilizing a supercritical carbon dioxide phase equi- librium apparatus, the cloud-point pressure method improved by the photosensitive method was used to measure the resistance- pressure curves of the three kinds of CO2-philic polymer PCA, PCB, and PCC in supercritical carbon dioxide. The cloud-point pressures of the PCA and PCB are below the PCC; the cloud point pressures of the three systems increase with the increasing mo- lecular weights and concentrations. The cloud-point pressures of the three polymer systems decrease with the increasing concen- trations of the cosolvents and rise with the temperature. The PCA and PCB can be used as the tackifier of the CO2-based fracture fluids at 35 ℃, but when the temperature increases to 55 ℃, PCB would show a better performance. This photosensitive method can be used to measure the cloud-point pressure for a variety of system accurately, which has a certain reference value on the measurement for similar experiments.

关 键 词：亲二氧化碳聚合物 超临界二氧化碳 浊点压力 助溶剂 光敏电阻 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]