An evaluation method of supercritical CO2 thickening result for particle transporting

Abstract

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Incipient motion behavior of the settled particles in supercritical CO2

“…The density differentiation is significantly larger than the drag coefficient differentiation [21]. Therefore, fluid density has a larger contribution to drag force than the drag coefficient [18]. The density of SC-CO2 is two orders of magnitude larger than that of gaseous CO2, and is close to that of liquid CO2.…”

“…The experimental data were processed using the OLYMPUS i-SPEED control software. The average uncertainty of the parameters measured by the experimental apparatus is 0.19% [18].…”

“…During this period, the Magnus force and buoyancy in the vertical direction act against gravity and slow the particle settling velocity, which increases the transportation distance of the particles. Buoyancy has been proven to a have significant effect on settling particles in SC-CO2 [18]. The Magnus force exhibits significantly different values in gases and liquids.…”

Numerical study of supercritical CO2 and proppant transport in different geometrical fractures

“…proposed the cotangent of particle landing angle which was used to evaluate the thicken performance of SC‐CO 2 . The particle‐settling velocity was found to determine the particle‐transporting distance and also the transporting capability of SC‐CO 2 …”

“…The particle-settling velocity was found to determine the particle-transporting distance and also the transporting capability of SC-CO 2 . 18 Previous research concentrated on the feasibility of proppant transport with SC-CO 2 in fracturing fractures. However, previous numerical models were usually limited to planar fracture cases and pre-existing natural fractures were not taken into consideration.…”