Xin Nie

Oct 29, 2024 | mdpi.com | Xin Nie |Yuan Chen |Yilin Chen |Chuanyi Yu

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Sep 19, 2023 | mdpi.com | Yifei Liu |Wei Wu |Xiang Chen |Xin Nie

4.3. Result Analysis 4.3.1. Waveform CharacteristicsFigure 11 shows the comparison results of the transmitted and reflected waves. The amplitude of the transmitted waves is normalized in Figure 11a. It can be observed that, with the increase in thickness, the rise time of the transmitted wave gradually slows down, and the pulse width gradually widens. Table 1 gives specific statistical results.

Mar 8, 2023 | mdpi.com | Xin Nie |Shuo Liu |Zhiyu Dong |Kaili Dong

Abstract:Temperature changes in CO2 foam-fracturing construction can easily affect surfactant foam stability. To investigate the effect of temperature on the foam stability of different types of surfactants, this study measured the foam half-life and viscosity of four typical surfactants, CTAB, LAS-30, HSB1214, and TX-10, using a novel self-designed and built foam performance measurement device. The effects of temperature on foam half-life and viscosity were studied.