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GeoMark Research, Ltd.
9748 Whithorn Drive
Houston, Texas 77095
GeoMark Research, Ltd.
PVT Analyses
Overview
Today’s fast-paced market requires quick results and accurate data to make reliable hydrocarbon decisions in a timely manner. The GeoMark PVT Laboratory performs a full range of pressure-volume-temperature (PVT) studies, oil-based mud evaluations, and flow assurance screening with rapid turnaround. High-resolution compositional analysis is often combined with isotopic measurements to deliver extremely detailed communication studies.
PVT Services
GeoMark Research’s established PVT laboratory has been serving the industry for over 15 years, providing critical subsurface fluid insights for our global customers:
- Fluid Phase Prediction: Predict when in-situ fluids will transition to multiple phases (bubble point and recoverable hydrocarbon insights).
- Well Interactions: Evaluate how parent-child relationships are affecting PVT behavior.
- Reservoir Continuity & Communication: Pressure assessment to identify reservoir communication.
- Production Management: Fluid property assessment for optimizing choke management and production infrastructure.
- Field sampling and wellsite services
- Sample transfer, validation and restoration
- PVT tests up to 20,000 psi and 400 degrees
- Reservoir fluid phase identification
- Surface separator fluid recombination
- Constant Composition Expansion (CCE)
- Differential Liberation (DL)
- Constant Volume Depletion (CVD)
- Multi-stage separator test
- Pressurized and Stock Tank fluid viscosities
- EOR – Minimum Miscibility (Slim Tube), Swelling and Multi-contact (reverse and forward)
- Flow Assurance – Asphaltenes and Waxes
- Long-term pressurized sample storage
- Working pressure maps
- PVT Cylinder Storage (Short and Long term)
Applications
Downhole PVT Samples
Once received in our laboratory, the collected fluid samples are restored via agitation at the original reservoir pressure and temperature. Initial validation checks provide basic PVT properties and a measure of oil-based mud contamination common to open-hole samples. More in-depth analyses provide additional information about specific hydrocarbon behaviors.
Surface PVT Sampling
Samples of gas and liquid exiting the separator are acquired, along with separate flow rate measurements of each, providing the gas-oil ratio (GOR). The fluids are then recombined in the laboratory to recreate representative reservoir fluids for accurate analysis.
EOR Testing
These tests are designed to determine the extent of gas miscibility and mixture phase behavior during gas injection into hydrocarbon reservoirs. While common in conventional reservoirs for decades, EOR programs have also found recent applicability in unconventional plays.
Surface oil and gas samples are captured and recombined to recreate downhole reservoir fluids. Injection gases may be separator or sales gas derived from a nearby installation, or synthetically prepared gas based on a composition provided to our laboratory.
Data in Context
Once samples are received in our lab, we pay attention to the smallest details to ensure testing accuracy. During all phases of the test program, we stay connected with you so you are part of an interactive process:
