Schlumberger

Quicksilver Probe Focused Fluid Extraction

Quicksilver Probe focused fluid extraction is deployed with the MDT modular formation dynamics tester to acquire low- to contamination-free formation fluid in a fraction of the time required for conventional fluid extraction. Our reservoir evaluation experts meet with you to design the tester configuration incorporating Quicksilver Probe extraction and specify procedures from the wide variety of available productivity and permeability tests along with fluid extraction and sampling, usually achievable in a single run of the toolstring. Quicker fluid withdrawal with Quicksilver Probe focused extraction means more-representative samples for real-time downhole fluid analysis (DFA) and avoiding extended production testing. We monitor operations progress in real time to ensure that pressure testing, DFA, and samping objectives are met. Our multidisciplinary interpretation experts then work with you as needed to leverage this powerful fluid data, such as building predictive reservoir models to determine fluid compositional gradation and reservoir connectivity across the field.

Interpretation Services for MDT Modular Formation Dynamics Tester Configured with Quicksilver Probe Focused Fluid Extraction and the InSitu Fluid Analyzer System
Wellsite Answers

Formation pressure

Drawdown mobility

Downhole fluid analysis:  fluid color and compositional analysis, asphaltenes content, viscosity, density, fluorescence, resistivity, and pH

Hydrocarbon composition (C1, C2, C3–C5, and C6+)

Gas/oil ratio (GOR) 

Sample contamination monitoring
Standard Interpretation

Grading of pressure and mobility quality

Pressure gradient analysis

Excess pressure analysis
Advanced Interpretation

Multiwell pressure gradient analysis

Single-well simulation for absolute open flow potential (AOFP)

Determination of vertical permeability and identification of flow barriers

Reservoir connectivity studies using downhole fluid analysis and equation-of-state modeling

 

Related services and products

 
 

Downhole Fluid Analysis Saves USD 24 Million in the North Sea

The quality of the water samples obtained in BG’s North Sea well was assessed by real-time LFA analysis. The middle track shows the volume fraction of hexane and heavier (C6+) hydrocarbon components, indicating oil-base mud filtrate contamination (green), oil-base mud and solids (red), and water (blue). At 2,600 s, soon after the guard and fluid-acquisition pumps start to pump synchronously, the acquisition flowline receives formation water, shown as blue on the volume-fraction track once high amplitudes are reached when water is detected on LFA optical Channels 6 and 9 (dark blue) on the bottom track. Channel 0 (black) detects methane. The top track shows the quartz-gauge pressure and strain-gauge pressure along with unscaled resistivity (pink) and pump strokes (blue and green).
Real-time optical analysis of fluids acquired by Quicksilver Probe focused fluid extraction from an exploratory well that accessed multiple hydrocarbon-bearing zones at HPHT conditions ensured that the water samples collected had virtually zero contamination, which avoided having to conduct a drillstem test. Read case study

Concentric Probes Quickly Divert Contaminated Fluid

The left schematic shows a conventional sampling probe and a typical contamination-time plot. In the right schematic, filtrate-contaminated reservoir fluid is contained by the annular perimeter probe of the Quicksilver Probe tool, while the center probe samples nearly contamination-free reservoir fluid in a fraction of the time.
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