TruSat™
Precision in Porosity & Saturation
GeoMark’s TruSat™ workflow solves critical challenges in evaluating porosity and fluid saturations in unconventional reservoirs, particularly where logs or core data alone may be misleading. Through Mobile vs. Immobile Fluid Quantification, TruSat distinguishes between extractable (mobile) hydrocarbons and matrix-bound (immobile) fluids, delivering a more accurate view of recoverable reserves. Its Dual-Retort Measurement system, combining open and closed retorts, independently quantifies total, free, and bound water, as well as S1 and S2 hydrocarbon fractions, achieving ~99% collection efficiency using both thermal and chemical extraction techniques.
TruSat also applies Fluid Loss Correction to account for changes during coring, transport, and sample preparation, ensuring the data reflects true in-situ conditions. By integrating geochemical insights such as TOC, pyrolysis, and Ultra High-Resolution GC data from both rock and extracted fluids, TruSat links reservoir properties directly to organic matter behavior. The result: calibrated, lab-measured saturations that support improved STOOIP estimates, optimize completions, and reduce uncertainty in reservoir evaluation.
Actionable Deliverables:
Total porosity
Mobile vs. bound water/oil volumes
Oil/water saturations
NMR T1/T2 fluid-typing and pore mapping (optional)
Enhanced reserve estimation, performance forecasting and DRV/SRV characterization when considering time-lapse geochemistry (applications)
(Bulk volume of rock, water, oil and air, thermally extracted porosity, chemically extracted porosity, TOC and HAWK in each state, density in each state
Click the button below to download our TruSat analysis brochure
CutSat™: Petrophysical Fluid Data from Cuttings
While previously, the TruSat methodology works on most crushed rock sample (i.e. whole core, RSWC, and/or PSWC), CutSat™ is an economical and high impact workflow that evaluates fluid saturations and porosity using cuttings.
This workflow uses novel analytical methods to quantify the types and amounts of fluids recovered from the rock under rigorously controlled laboratory conditions. The real value in CutSat comes from application on cuttings. Now, your petrophysical model can be refined to honor the rock-based quantification of fluids within the wellbore utilizing materials already being generated.
Quantitative Mobile Hydrocarbon Volumes
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Measure bulk volume oil (BVO) per interval
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Normalize to formation volume to estimate free hydrocarbons in bbl/ac-ft
Saturation & Enrichment Indices
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Calculate Retort Oil Saturation Index (ROSI): Retort EOM / TOC × 100
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Assess maturity and charge zones vertically
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Detect and characterize variation in hydrocarbon signatures along a lateral well
Oil Fingerprints
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Perform Ultra-High-Resolution GC on thermally extracted oil
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Differentiate zones, identify contamination, and track oil compositional trends
Input for Production Allocation
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Compare retort oil from cuttings to produced oil for zone-specific allocation
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Guides fluid baselines in multi-zone completions
Customer Benefits:
Enables rapid insights using existing drilling materials
Reduces dependence on costly core acquisition
Scales efficiently across large well datasets
Ideal for unconventional or data-sparse reservoirs
Click the button below to download our CutSat analysis brochure