Slurry Fracture Injection (SFI)

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Advanced deep well disposal process

Page last modified
August 4 2023

The Slurry Fracture Injection (SFI) process is an environmentally sustainable technology used to place petroleum E&P waste, NORM, biosolids, and contaminated soils in the deep subsurface. SFI advanced deep well disposal is characterized by:

  • Lower injection rates & pressures
  • Continuous, cyclic injection operations
  • Development of complex geomechanics
  • Controlled development of a formation ‘waste pod’ in the near-wellbore area and out into the far-field formation
  • Robust Process Monitoring & Process Control systems
  • Cost-effective, Zero-Discharge, and permanent disposal process
  • Small environmental footprint


Protection of underground sources of drinking water
Elimination of run-off & contamination risks to surface and groundwater
Elimination of surface land use impairment
No induced seismicity
Elimination of long-distance waste material transportation risks and costs
Greatly reduces long-term liability to operator/generator
Safeguards human health by reducing and removing pollution from the biosphere
Contributes to an efficient and economical waste management strategy
Permanent Zero-Discharge waste disposal
SFI process is geology-dependent for large scale disposal operations


Areas of Application E&P wastes | Drilling wastes | Oilfield produced solids | Oily viscous fluids/sludge | Tank/pit bottoms | Contaminated soils | NORM/TENORM | Low-level radioactive material | Wastewater treatment sludge | Sulphur by-product | Industrial effluent/sludge
Certifications / licences Terralog’s systems for SFI design & implementation are certified to ISO 9001:2015, ISO 14001:2015, and OHSAS 18001:2007.
Depth Typical disposal depths: 350 – 2,500 m.
Environment SFI has a proven environmental record of Zero-Discharge waste disposal, with no impact on future land use.
Grain size SFI can effectively dispose of materials with grain sizes up to 5 mm. The slurry is made with the highest possible solid material concentration – from 10 to 25 percent by volume.
Safety Safeguards human health by reducing and removing pollution from the biosphere.
Volume Large waste volumes (up to 15,000 m3 per month).

Relative Business Impact


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Technology Readiness Level


Development Technology demonstration Mature / Proven
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Terralog Technologies Inc. (TTI) is an international service company providing innovative technologies for Sustainable Energy Resource Development. TTI’s area of expertise is Clean Energy Geomechanics.

TTI’s services are built on extensive experience in environmental geomechanics, geology, fracture mechanics, project management, and field operations with projects worldwide.


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