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Technical Paper: Asphaltene Precipitation From Reservoir Fluids: Asphaltene Solubility and Particle Size vs. Pressure

Society: SPE
Paper Number: 80263
Presentation Date: 2003
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Abstract

The near-infrared (NIR) light scattering technique, commercially known as solids detection system (SDS) is widely used to determine the asphaltene precipitation pressure in reservoir fluids. In this study the SDS is used to compare samples collected from the same zone in the same well at the same time but in different sample chambers. The SDS technique is further compared with high pressure filtration for the same fluid studied by SDS In addition, asphaltene precipitation as a function of pressure was determined.

The results of this study indicate that the SDS test provides a quick tool to determine the asphatene precipitation pressure but has limited sensitivity. Furthermore, the bulk of asphaltenes tended to precipitate within a narrow pressure range near the precipitation onset pressure for the fluid sample tested in this study.

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