Impact of Polymers on Sand Sedimentation Characteristics of Shale Oil-Produced Fluid
Yongbin Shang, Qiaosheng Zhang, Wanrui Li, Tian Gao, Ruhao Zhao, Lan Bai, Xiaoming Luo
TL;DR
This study explores how polymers in shale oil production fluids affect sand sedimentation, revealing two mechanisms and how factors like water content and temperature influence the process.
Contribution
The study identifies two distinct sedimentation mechanisms caused by polymers and quantifies their increased sedimentation rates.
Findings
Sand sedimentation in polymer-containing fluids involves gravity-dominated single-particle sedimentation and polymer-induced flocculation–sedimentation.
Water content and temperature enhance sedimentation rates by 38.05% and 54.76%, respectively.
Polymers also induce hindering effects during sedimentation.
Abstract
The introduction of polymers has significantly altered the properties of sand particles in shale oil production fluids, leading to a more complex sedimentation mechanism. However, the specific ways in which polymers influence sand sedimentation dynamics remain poorly understood. In this study, Soxhlet extraction and supercritical water oxidation techniques were employed to compare the particle size distribution of polymer-containing sand with that of actual sand. The results show that sand sedimentation in polymer-containing shale oil production fluids involves two mechanisms: gravity-dominated single-particle sedimentation and polymer-induced multi-particle flocculation–sedimentation. Additionally, polymers induce both flocculation–sedimentation and hindering effects. Specifically, the water content and temperature can promote single-particle sedimentation and…
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Taxonomy
TopicsHydraulic Fracturing and Reservoir Analysis · Enhanced Oil Recovery Techniques · Petroleum Processing and Analysis