PVT Analysis
Maximize Reservoir Performance with GeoMark’s PVT and Geochemical Analysis
PVT analysis is more than just measuring shrinkage and GOR; it’s about transforming fluid samples into strategic insight. With cutting-edge PVT laboratories and decades of experience, GeoMark helps operators unravel the full story of their fluids, from reservoir correlations to sale.​
GeoMark Research’s PVT analysis services help operators unlock a deeper understanding of fluid behavior across the lifecycle of a reservoir. From exploration through production, we provide the high-resolution fluid property data needed to inform reservoir models, optimize recovery strategies, and avoid costly surprises.
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Whether you're estimating original hydrocarbon in place, forecasting phase behavior, or calibrating Equation of State (EOS) models, our Constant Composition Expansion (CCE), Constant Volume Completion (CVD), Differential Liberation (DL), and other lab-based PVT tests ensure you have the pressure-volume-temperature insights to do it right. We specialize in complex fluid systems, including unconventional reservoirs and recombination scenarios, and can integrate PVT data with mud gas, oil geochemistry, and isotope signatures for a more complete reservoir picture.
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A Fully Customizable Toolbelt to Meet All Your PVT Needs
Compositional Analysis
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Full compositional breakdown of reservoir fluids (C1 to C30+, CO2, H2S, and N2)
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Extended gas chromatography for detailed fluid characterization
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Advanced hydrocarbon fingerprinting for fluid correlation and allocation
Phase Behavior Studies
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Constant Composition Expansion (CCE) experiments
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Differential Liberation (DL) tests for oil systems
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Constant Volume Depletion (CVD) tests for condensate systems
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Multi-stage separator tests to determine optimal production strategies
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Multi-stage flash liberation tests for accurate phase characterization
Fluid Property Determination
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Density, viscosity, and compressibility measurements at reservoir conditions
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Gas-oil ratio (GOR) and formation volume factor (Bo, Bg) evaluation
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Live fluid sampling and recombination for accurate in-situ measurements
Flow Assurance & Solid Deposition Analysis
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Wax appearance temperature (WAT) and wax precipitation studies
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Asphaltene onset pressure (AOP) and stability assessments
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Hydrate formation and inhibition testing to prevent flow restrictions
Enhanced Reservoir Connectivity & Continuity Studies
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Ultra-High-Resolution Gas Chromatography (UHRGC) for precise reservoir connectivity assessment
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Geochemical modeling to support well allocation and drainage strategies
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Integration with geophysical and petrophysical datasets for comprehensive reservoir understanding
From PVT to Geochemistry: A Complete Picture
GeoMark is unique in combining traditional PVT with advanced geochemical fingerprinting techniques:
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Isotopes, Biomarkers, Molecular Ratios: Applied directly to PVT samples to trace thermal maturity, migration history, and zone contributions.
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Production Allocation: Go beyond pressure and GOR. Molecular signatures reveal subtle compartmentalization or connectivity even where PVT looks identical.
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Reservoir Connectivity: In stacked or commingled reservoirs, PVT + geochemistry resolve which zones are truly contributing, reducing uncertainty in reserves booking and regulatory compliance.
Real-World Impact: Case Studies
Faulted reservoir?
GeoMark confirmed connectivity using isotopes, GC fingerprints, and pressure data—even with minor contamination.​​​
Case 1
Case 2
No samples? No problem. GeoMark estimated GOR using pressure gradients and gas isotopes—empowering early development plans.​​​
Case 3
Gas cap or separate accumulation?
Integrated data revealed a single reservoir, avoiding misclassification and development missteps.​​​
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