Fluid movement monitoring

Characterisation of fluid-transport properties of rocks is one of the most important, yet one of most challenging, goals of reservoir geophysics. The idea of utilising active seismic technology to explore hydraulic properties of rocks is very attractive, however, despite its large penetration range and high resolution, the method lacks sensitivity to rock permeability and mobility of pore fluids.

This is where microseismic monitoring of borehole fluid injections comes into its own as a characterisation method. Borehole fluid injections are often applied for stimulation and development of hydrocarbon and geothermal reservoirs. Production of shale gas and heavy oil as well as CO2 sequestration are relatively recent technological areas that require broad applications of this technology. The fact that fluid injection causes seismicity has been well established for several decades. It is therefore paramount to understand and monitor fluid-induced seismicity for hydraulic characterisation of reservoirs and assessments of reservoir stimulations.

TenzorGEO offers fluid movement monitoring service using Full-Wave Location technology which is based on full-waveform seismic numerical simulation and uses microseismic events information that occurs throughout the production life of reservoirs.

Fluid injection induces high fluid pore pressure changes at the fluid front, triggering microseismic events. A picture of the fluid-front movement inside the rock mass can be achieved by examining the change in the location of these events in time. The microseismic data presented as a 3D image gives preferred flow paths and indicates possible flow anisotropy.
The information about the direction of movement of the injection fluid in the reservoir and the position of its filtration channels allows our clients to:

  • optimise field development
  • increase productivity
  • confirm the boundary of the injected affluent waters or CO2 plume
  • have an advanced warning of potential threats to the reservoir seal integrity

TenzorGEO has a vast experience in performing fluid movement monitoring surveys and you can find further details in our Case Studies section.

DR ROY BITRUS, PhD

DIRECTOR OF SALES

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Effluent Injection Operation

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DR ROY BITRUS, PHD

DIRECTOR OF SALES

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