石油与天然气化工2025，Vol.54Issue(6)：77-82,6.DOI:10.3969/j.issn.1007-3426.2025.06.009
超临界CO2压裂液增稠剂的制备及性能评价
Preparation and performance evaluation of thickeners for supercritical CO2 fracturing fluid
摘要
Abstract
Objective A new type of thickening agent for CO2 fracturing fluid is prepared to address the problems of poor fracturing effect and poor sand-carrying capacity caused by the low viscosity of pure CO2 during the fracturing process,and its performance is studied.Method A modified siloxane thickener DHTAF was prepared based on the silica-hydrogen addition reaction,and based on which fluorocarbon alkanes were introduced to further enhance the viscosity of the fracturing fluid system through chemical action.The synthesized thickeners were characterized by infrared and nuclear magnetic resonance;their solubility properties were observed;the viscosities of the systems were measured at different contents,temperatures and pressures;and finally,their friction and sand-carrying properties were evaluated.Result The results showed the successful synthesis of the target thickener agent by IR and 1H NMR analysis.The solubility properties of the synthesized thickener agent were good.The viscosity of the fracturing fluid system increased with the increase of thickener content and pressure,and decreased with the increase of temperature,and the viscosity of the fracturing fluid containing 3 wt%DHTAF thickener was up to 3.408 mPa·s at 40℃,10.0 MPa.The friction coefficient decreased with the increase of pipe flow velocity and increased with the increase of thickener content;the proppant settling velocity decreased with the increase of thickener content.Conclusion Introducing fluorocarbon hydrocarbons onto modified siloxane molecules can further enhance the viscosity of CO2 fracturing fluid,providing theoretical support for the future application of supercritical CO2 fracturing technology in unconventional oil and gas resources.关键词
超临界CO2/硅氧烷增稠剂/溶解性能/摩阻系数/携砂性能Key words
supercritical CO2/siloxane thickener/dissolution property/friction coefficient/sand-carrying property引用本文复制引用
熊颖,陈鹏飞,蒋锐,李金涛,蒲万芬,杜代军..超临界CO2压裂液增稠剂的制备及性能评价[J].石油与天然气化工,2025,54(6):77-82,6.基金项目
中国石油西南油气田公司校企联合攻关项目"页岩用二氧化碳驱替压裂液关键技术研究"(20230302-33) （20230302-33）
