Experimental Study on Rheological Properties of Thinkened Co2 in Liquid and Supercritical State. (17th November 2018)

• Record Type: Journal Article
• Authors: Li, Binfei; Shi, Dashan; Lv, Qichao; Bai, Hao; Zheng, Chao; Xu, Jianguo
• Is Part Of: Petroleum science and technology. Volume 36:Number 22(2018)
• Page Start: 1913
• Page End: 1919
• Publication Date: 2018-11-17
• Subjects: CO2 fracturing -- consistency coefficient; effective viscosity; flow index; pipeline rheology -- rheological parameters; Liquid fuels -- Periodicals; Petroleum -- Periodicals; 665.505
• DOI: 10.1080/10916466.2018.1517171
• Languages: English
• ISSNs: 1091-6466

Abstract

Abstract: The rheology of CO2 fracturing fluid are complicated because of its phase change. In this work, pipeline rheology of CO2 in a range of 8–16 MPa and 10–60 °C were studied. The results showed that the thickened CO2 was characterized by a power-law fluid. With the thickener or pressure increased, the consistency coefficient K increased and the flow index n decreased. In the liquid or supercritical state, temperature increasing made the K decrease and the n increase. However, when CO2 transformed from the liquid to the supercritical state in 30–40 °C, and the K increased while the n decreased.