OEMG global has partnered with Demco NV to provide this innovative system in the Australasian region. The Aquares Resistivity System is a high resolution, advanced geophysical method, utilising enhanced acquisition and processing techniques that provide both quantitative (i.e. depths and thicknesses) and qualitative (i.e. quality or resistivity) data about the structural geology. Aquares has brought resistivity to the forefront of fluvial and marine sub-bottom investigations and, together with the Integrated Digital Ground Model (IDGM) is the superior choice for geological investigations.
What is the Aquares Resistivity System?
Aquares is a sub-bottom profiling system that uses resistivity techniques, modified from traditional land based systems, to provide high resolution quantitative and qualitative data of both consolidated and unconsolidated sub-bottom strata. Quantitative data (commonly acquired from acoustic reflection systems) is defined as data relating to depth and thicknesses of sub-bottom structures. Qualitative data is defined as data that relates to the quality of the observed structures (e.g. sand, silt or clay in the case of sediments and rock quality, fresh or weathered in the case of consolidated units as well as intra-layer variability). High resolution qualitative data is extremely useful for planning construction activities including, dredging, trenching, under bores, or piling. Utilising Aquares results, project planners and engineers have a complete picture of the existing sub-bottom environment. This allows designs to take into account sub-bottom structures such as paleo-channels, weathered and un-weathered rock outcrops to considerably reduced dredging and construction costs. Marine deployment methods have also been refined to allow Aquares to be deployed as a standalone system or in concert with other geophysical systems.
The Aquares Resistivity System is available in three variants:
- On land
- Shallow water (0.1m-35m)
- Deep water (15m to 200m).
The land system is deployed using a standard light truck battery, the shallow system utilises a Kevlar reinforced umbilical and the deep system a 600m long, 23mm diameter steel jacketed umbilical deployed from a winch. Additionally, the system may be modified to accommodate special circumstances or requirements such as deeper penetrations, however these are discussed on a required basis. The operating theory is common to all variants and is discussed below.