Relative Permeability
We encourage early consultation with our clients in an effort to design relative permeability test programs that are consistent with processes in the field. PTS offers a full complement of relative permeability tests including:

Steady state X-ray CT monitored (7-point standard).
Water-oil and gas-oil, ambient and reservoir conditions.
Imbibition and drainage cycling.
Unsteady state (constant rate or constant pressure).
Water-oil and gas-oil, ambient and reservoir conditions

NMR Analysis

PTS Labs is equipped with a state-of-the-art Maran Ultra NMR core analyzer, and flow-through core holders capable of testing at both ambient and reservoir conditions. For calibration with downhole logging tools, the instrument can match pulsed NMR tool magnetic strength and T2 echo spacing. NMR determinations include: Effective & Free-Fluid Porosities Pore Size Distribution & Geometry Fluid Saturations & Distributions Free Fluids, Mobile Oil, Gas & Water Capillary-Bound Water Clay Bound Water Permeability Producible Fluids and Fluid Types Oil Viscosity Application Overview (Word Doc)

Electrical Properties Electrical property measurements are available using either the porous plate or dynamic displacement technique. PTS has the capacity to simultaneously test over 100 samples, using either 2 or 4 electrode measurements at reservoir conditions. Data include Resistivities (Rw, Ro, Rt), Formation Factor (F), Resistivity Index (I), cementation and Saturation Exponents (m & n), and Co-Cw analysis for clay-corrections. Capillary Pressure Capillary pressure measurements are available using porous plate, high-speed centrifuge, or mercury injection techniques. Porous plate measurements can be performed at ambient and/or elevated temperatures. Centrifuge data is currently limited to ambient or moderate temperatures. PTS is equipped with 2 automated Micromeritics mercury injection porosimeters for testing at pressures up to 60,000 psi. Application Overview (Word Doc) 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 coreflood 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. Wettability Testing Knowledge of the wettability of a reservoir rock is a key factor for determining oil recovery mechanisms and making estimates of recovery efficiency. PTS offers industry-standard Amott and Modified USBM wettability tests, including the USBM test at elevated temperatures. For samples that have been subjected to weathering, PTS offers sample restoration in crude oil at reservoir temperature. Pore Volume Compressibility Hydrostatic pore volume compressibility testing is a routine offering for 1-in., 1.5-in. and 2-in. diameter samples and pressures up to 10,000 psi. Cyclic compression and decompression tests, as well as failure point determination tests, are also available. PTS has in-house capabilities to perform uniaxial or triaxial stress testing. Advanced geomechanical determinations are also available (see Geomechanical Studies). 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.