Methods and apparatus for analyzing fluid properties of emulsions using fluorescence spectroscopy

US7705982B2 · kind B2 · utility

Assignee

• SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

• Jesus Alberto Canas Triana · Macaé, BR
• A. Ballard Andrews · Wilton, US
• Marc Schneider · Walheim, DE
• Evie Freitas · Macaé, BR
• Oliver C. Mullins · Ridgefield, US
• ChenGang Xian · Abu Dhabi, AE
• Andrew Carnegie · Kuala Lumpur, MY
• Jamil Al-Naser · Al Ain, AE

Key dates

• Filing date: Jan 26, 2007
• Grant date: Apr 27, 2010
• Expiry date: May 5, 2028

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B47/113
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

This relates to methods and apparatus for analyzing samples by fluorescence spectroscopy. In one embodiment, the methods and apparatus use a fluorescence detection unit (FDU) of a composition fluid analyzer (CFA™) module to detect variations in fluid properties (gradients) within an oil bearing column. Some embodiments enable efficient downhole fluid analysis in heavy oils where water/oil emulsions are present (water in dispersed phase and oil in the continuous phase). The principles described herein may also be applied when there are fine particles in the oil such as from unconsolidated sands.