Single-Phase Fluid Sample Collection
Maintaining reservoir conditions for PVT samples
Recover single-phase samples, representative of downhole formation conditions for accurate compositional and PVT analysis.
The InSitu Fluorescence reservoir fluid fluorescence sensor of the InSitu Fluid Analyzer system detects free gas bubbles and retrograde condensate liquid dropout for single-phase assurance during downhole fluid analysis (DFA) and sample collection. Fluid type is also identified. The resulting fluid phase information is especially useful for defining the difference between retrograde condensates and volatile oils, which can have similar gas/oil ratios (GORs) and live-oil densities.
Because the fluorescence measurement is also sensitive to liquid precipitation in a condensate gas when the flowing pressure falls below the dewpoint, it can be used to monitor phase separation in real time to ensure the collection of representative single-phase samples.
Formation water sampling is important for characterizing hydrocarbon/water transition zones, understanding scaling and corrosion potential of the water, and determining compatibility between formation water and injection water.