Sensitivity/Completion Fluids Testing

A formation sensitivity test can be critical for completions in reservoirs that are susceptible to permeability damage, or for determining the proper intervention for a damaged well. The test is a specialized core flood that involves forward and reverse flow while monitoring pressure differential. PTS offers standard test packages at ambient and reservoir temperatures, and customized tests using reservoir fluids (pore filling and supplied completion fluids) and conditions.

Improved Recovery Tests

PTS Labs is fully equipped to perform improved recovery tests utilizing thermal, chemical or gas injection methods. These services can be performed on single or stacked core mounts and utilizing the CT scanner for saturation monitoring. PTS provides multi-level packages to test for EOR compatibility of aqueous based agents with reservoir rocks, formation waters and hydrocarbon fluids. Each package is designed to be cost effective and meet specific data requirements.

Level 1 provides the basic data needed for EOR screening:
Bottle/shake testing at room conditions. Determination of the basic interaction between an EOR agent and crude oil.

Level 2 provides Level 1 data plus interfacial tension (IFT measurements):
Bottle/shake testing at room conditions. Determination of the basic interaction between an EOR agent and crude oil. Measure reduction in IFT between water and oil phases.

Level 3 determines incremental oil recovery of an EOR process by core flood testing:
Incremental oil recovery based on additional oil produced from a core after water flooding.  Tests conducted at reservoir temperature (up to 175 ºF) and net overburden pressure.

Thermal Recovery - Field Monitoring

Produced oil and water samples are analyzed periodically to monitor the progress of a thermal recovery process in the field.  Chromatographic analysis of produced crude oil provides the data to improve management of the flood and improve sweep out of the reservoir.

Hot Water Drive End Point

Determine oil recovery by hot water displacement (core flood) of crude oil.  Additional objectives can include rock damage assessment (deposition, rock dissolution, etc.) through water chemistry analysis.  Tests conducted at reservoir temperature (up to 200ºF) and net overburden pressure.

Steam Flood Endpoint

Determine oil recovery by steam flooding crude oil to residual oil saturation. Tests conducted at reservoir temperature (up to 400ºF) and net overburden pressure. Additional objectives can include rock damage assessment (deposition, rock dissolution, etc.) through geochemical analysis of produced water, and steam distillation effects on the crude oil.

Oil Fingerprinting Services
Chromatography (FSCOT Method)

PTS Laboratories has been a leader in the application of fingerprinting analysis to the oilfield for several decades.   Our commitment to the technology is so fundamental that, since it inception, PTS has symbolically associated the corporate image with specialized oil fingerprint analyses.    

Chromatographic analysis (fingerprinting) yields a detailed hydrocarbon composition of a crude oil over the molecular range of C2 through C34 utilizing programmed temperature chromatography.  Multiple-sample analysis allows for oil sample comparisons and correlations utilizing a polar plot diagram of hydrocarbon peak-height ratios.   The analysis provides information to resolve uncertainties associated with reservoir continuity, zonal performance, and commingled production.