TruSat™ Rock Properties
Precision in Porosity & Saturation
GeoMark’s TruSat™ workflow delivers unmatched accuracy in quantifying porosity and saturation, critical for subsurface modeling and producibility forecasts.
Dual-Retort Measurement: Separately quantifies total, free and bound water, in addition to mobile vs. immobile hydrocarbons, using a closed retort system with ~99% capture efficiency with thermal and chemical extraction techniques.
Independent Cross-Checking: Combines nuclear magnetic resonance (NMR), geochemical TOC/HAWK, and multiple porosity techniques to validate saturation data.
Fluid Loss Correction: Adjusts for fluid loss during coring, transport, and sample prep, ensuring data integrity from subsurface to lab.
Mobile vs. Immobile Fluid Resolution: Differentiates between extractable (mobile) and matrix-bound (immobile) fluids, offering deeper insight into recoverable reserves.
Geochemical Integration: Includes pyrolysis and high-resolution GC analysis for both as-received rock and post-extraction fluids, linking rock properties to organic matter behavior.
Actionable Deliverables:
Updated net reservoir porosity
Mobile vs. bound water/oil volumes
NMR T1/T2 fluid-typing and pore mapping (additional cost)
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
Customer Benefits:
Reliable reserve recalibration and production forecasting
Integration across geoscience and engineering workflows
Stronger confidence in reservoir estimations
CutSat™: Fluid Data from Cuttings
‘CutSat™’ is an economical workflow to provide calibration to petrophysical models in the portioning in the distribution of fluids in the pore system. This workflow uses established analytical methods to quantify the types and amounts of fluids recovered from the rock under rigorously controlled laboratory conditions.
While previously, the TruSat methodology works on most crushed rock sample (i.e. whole core, RSWC, and/or PSWC), the real VALUE 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
High-Resolution 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
