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Fracture Monitoring System - GEOFRAC

GEOFRAC 

 

For Hydraulic Fracture Mapping

 

The GEOFRAC system is an acoustic downhole tool (GEOREC-S), a surface acquisition rack with  a special software designed to determine the orientation and extension of fractures induced by hydraulic stimulation or existing fractures worked on by fluid injection.

 

The GEOREC-S sonde is fitted with a triaxial accelerometer, pressure and temperature gauges.

The sonde is attached to a standard seven conductor logging cable and lowered either down the well to be fractured or down the injection well. Digital signals are high-speed transmitted from the sonde to the surface acquisition system.

During falloffs following hydraulic fracturing, the GEOREC-S tool records, via the accelerometers, the seismic activity associated with the closure of the fracture. Fracture mapping is performed by locating the different micro seismic events, their location being based on the interpretation of the P/S-wave succession, assuming the velocity model is known. Thereby these data are interpreted in term of azimuth and expression of the fracture taking into account the layer properties.

 

 

 

 

 

 

BENEFITS: 

 

* Assess the development of the hydraulic fracture during a minifrac test.

 

* Determine the main direction of fluid injection paths in anisotropic réservoirs.

 


Data sheet : Doc-SIMFRAC-2009.pdf
Case studies : Doc2.pdf; Doc4.pdf; Doc5.pdf