What type of Marine Geo Survey do you require?

 

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Diveworks International have the capability to provide a variety of marine surveys. Whether our clients requirement is to locate potential UXO threat or to provide imagery of a structure, Diveworks International can accommodate these needs with a Marine Geo Survey approach.

A geophysical survey is a method used to investigate and map the earth within bodies of water by measuring different physical properties using several techniques such as measuring magnetic fields, electrical conductivity, seismic waves, or remote sensing to create images and models of the subsurface. For many clients, a Marine Geo Survey is the preferred method for comprehensive results.

Bathymetric Surveys

A bathymetric survey is a method used to measure and map the depth of water bodies such as oceans, seas, lakes, and rivers. In many cases, a marine survey with geo specializations—such as a Marine Geo Survey—will include bathymetric survey techniques for detailed underwater analysis.

Bathymetric surveys are conducted using an echo sounder attached to a survey boat. As the boat moves across the water, the echo sounder will generate electrical signals. These are then converted into soundwaves by an under-water transducer. Soundwaves will bounce off features under the water and this echo is then identified by the echo sounder and the distance to the identified feature is calculated. Bathymetric survey systems rely on highly accurate GNSS (GPS) systems to link each measured distance to a particular depth on the surveying map. Ultimately, data from Marine Geo Survey instrumentation supports precise mapping.

The information gathered from a bathymetric survey is crucial for various applications such as UXO identification, navigation, resource exploration, ecosystem monitoring, and coastal zone management. Therefore, Marine Geo Survey data is essential for informed marine decision making.

3D Seismic Surveys

A 3D seismic survey is a method used in the marine industry to create detailed images of underground rock formations. It involves sending sound waves into the ground and recording the reflections that bounce back. In the broader context of Marine Geo Survey techniques, 3D seismic data supports deep subsurface analysis.

By using multiple seismic sources and receivers in a grid pattern, a three-dimensional picture of the subsurface geology can be generated. Many Marine Geo Survey teams rely on seismic surveys for gathering high-resolution data.

This data can help identify pUXO targets for further investigation. Or within the Oil and Gas industry helps geoscientists and engineers locate potential hydrocarbon reservoirs and plan drilling operations more effectively. Marine Geo Survey findings are critical for these sectors.

Magnetic total field and gradiometer surveys
A magnetic total field and gradiometer survey is a geophysical method used to measure variations in the Earth’s magnetic field. This type of measurement is an important aspect of any complete Marine Geo Survey carried out for exploration.

Total field magnetometers measure the strength and direction of the magnetic field at a specific location, while gradiometers measure the rate of change of the magnetic field over distance. By collecting data from multiple points, these surveys can help identify subsurface features such as pUXO targets, buried structures, mineral deposits, or archaeological artifacts that may cause anomalies in the magnetic field. Marine Geo Survey services often include magnetic techniques for comprehensive exploration.