Capillary Pressure & Electrical Properties (I-Sw)

Automated Capillary Pressure & Electrical Properties System

An automated all-in-one system cart for determining steady-state porous plate capillary pressure and rock & fluid electrical properties. Measures the Resistivity Index (I-Sw) relationship under in-situ pressure and elevated isothermal temperature conditions using pressure equilibrium or constant flow injection methods.

10,000 psiConfining Pressure

2,900 psiPore Pressure

80°CMax Temperature

1.4 × 10⁻⁵ cc/minMin Injection Rate

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Capable of performing:

Capillary Pressure (Porous Plate)

Resistivity Index (I-Sw)

Formation Factor (F)

Cementation Exponent (m)

Saturation Exponent (n)

Ro & Rt Measurement

Drainage Experiments

Reservoir Characterization

System Features

All-in-one system cart design for a compact, self-contained laboratory footprint
Direct and continuous 4-wire resistivity measurement for accurate electrical property determination
Fully integrated injection and back-pressure control operating in both flow rate and pressure modes
Seamless coordinated operation for stable capillary pressure curve generation and drainage experiments
Pressure control to simulate realistic in-situ stress conditions
Temperature controlled via incubator for stable isothermal conditions throughout testing
Materials of construction for wetted components suitable for corrosive fluids
Compatible fluids: oil, water, and nitrogen
Supplied with single core holder; designed for easy expansion to multiple core holders
Live data monitoring and visualization throughout the test

System Components

MetaRock I-Sw Apparatus DAQ Control System
Incubator Oven
I-Sw Core Holder
Injection and Back-Pressure Pumps
Confining Pump
High-resolution Digital Pressure Transducers
PC, UPS, Keyboard, and Monitor

System Level
Sample compatibility	1″ OD × 2″ and 1½″ OD × 3″
Pore pressure	2,900 psi [200 barg]
Confining pressure	10,000 psi [690 barg]
Maximum temperature	80°C
Minimum injection rate	1.4 × 10⁻⁵ cc/min
Dimensions (L × W × H)	50″ × 29.2″ × 67″ [1.27m × 0.74m × 1.70m]
Dimensions (door open)	57.5″ × 51.2″ × 67″
Weight	~1,000 lbs [~454 kg]
Core Holder Pressure Vessel
Maximum pressure	10,000 psi [690 barg]
Maximum temperature	85°C
Electrical feedthrough	4-wire resistivity measurement
Material	Stainless Steel
Back-Pressure & Injection Pumps
Capacity	30 mL
Maximum pressure	15,000 psi [1,034 barg]
Maximum temperature	90°C
Material	HC-276 with ceramic piston and PTFE/Viton wetted components
Confining Pump
Capacity	30 mL
Maximum pressure	15,000 psi [1,034 barg]
Maximum temperature	90°C
Material	Stainless Steel
Incubator Oven
Maximum temperature	100°C

MetaRock I-Sw Apparatus Software

Constant Pressure or Constant Flow injection modes
Continuous resistivity measurement throughout the test cycle
Quick and reliable identification of key events during drainage and imbibition
Accelerates data interpretation workflow
Comprehensive understanding of core sample I-Sw relationship
Live data monitoring and visualization

Electrical Properties

Determination of cementation exponent (m) and saturation exponent (n)
Measurement of formation factor (F), resistivity index (RI), Ro, and Rt