Acid Fracture conductivity system Reservoir stimulation Instruments

The Acid Fracture conductivity system Reservoir stimulation Instruments accurately mimics the acid fracturing stimulation process in carbonate formations. The device performs acid etching patterns on carbonate core specimens confined in a fracture conductivity cell under realistic temperature, acid pressure and flow conditions while monitoring fluid loss during leak-off. The system uses specimens with large exposed surface areas to enable more realistic etching patterns and greater penetration in the leak-off direction.

Additionally, the Acid Fracture conductivity system Reservoir stimulation Instruments evaluates both short-term and long-term conductivities of unpropped and propped acid fractures under down-hole conditions of stress and temperature using either brine or nitrogen gas. Short-term conductivity tests evaluate the effects of formation type, acid-rock contact time, acid type, acid concentration, temperature, flow regime and high closure stress on acid-etched fracture conductivity. Long-term conductivity tests analyze the effects of acid-etched fracture creep deformation, proppant embedment, proppant size and concentration under high closure stress.

Maximum closure stress :

• 20,000 psi

Maximum working temperature :

• Ambient to 177°C (350°F)

Flow pressure :

• up to 3,000 psi

Specimen length :

• 7"

Specimen width :

• 1.5"

Specimen height :

• 2 × 3"

Material :

• Hastelloy

Power supply :

• 220 VAC, 50 or 60 Hz

Nitrogen pressure requirement :

• 2,000 psi

Air pressure requirement :

• 100 psi