Accurate Optical Measurement of Hydrocarbons and Water Content
Optical analysis for representative sampling
The CFA composition fluid analyzer module of the MDT modular formation dynamics tester ensures that you get representative samples. The CFA module builds on our proven expertise in downhole fluid analysis (DFA) to advance the technologies of gas sampling and analysis.
As single-phase reservoir gas flows through the CFA analyzer, a near-infrared optical absorption spectrometer determines in real time the concentration of
- methane (C1)
- ethane-propane-butane-pentane (C2–C5)
- heavier hydrocarbon molecules (C6+)
- H2O.
With this compositional information, you get the condensate yield, or gas/condensate ratio (CGR), which is the inverse of GOR.
The module also measures fluorescence emission to identify fluid type and ensure that samples are acquired above the dewpoint for a gas condensate.
Information to optimize production
The CFA analyzer obtains production-optimizing information not previously available in real time on wireline. This includes fluid scanning for a compositional gradient in a thick reservoir, identification of layers with different fluids, downhole determination of dewpoint, secondary recovery monitoring, and oil-base-mud sampling.
MDT modular formation dynamics tester
The CFA analyzer is one of the modules of the innovative MDT tool. With its modular design, the MDT tool can be configured on site to accomplish specific PVT measurements and sampling objectives. Different modules are used to acquire the exact information required for informed and timely decision making.
Benefits
- Representative single-phase samples with an acceptably low level of contamination
- Minimal time required for sample acquisition
- Early determination of GOR or CGR for reservoir valuation
- Determination of fluid compositional gradient for reservoir modeling
- Early determination of layer connectivity for completion decisions
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