Airborne Geophysical Services > Survey Technology > Airborne Gravity

Conclusion

The unique design of the Fugro airborne gravity system provides costs savings by way of:

• Aircraft independent gravity systems
• Reliable L&R gravity sensors
• Minimal tie line requirements
• Corrections that minimize the need for extreme flight stability

The unique design criteria also provides high quality, minimally filtered data that have been verified by three independently measured methods. These data have been acquired in real exploration survey conditions.

Internal and external evaluations have quantified these improvements over salt domes and thick sediments in the petroleum environment. Internal evaluation consistent of 6 non-averaged repeated lines and 101 network crossovers, along with external evaluation consistent of ground gravity comparison results in an accuracy of approximately 0.6 mGals with 6km half-wavelength, half-amplitude resolution.

The Fugro fleet, under the command of 15 strategically located Fugro Airborne Survey offices around the world, include 16 aircraft suitable for the economic acquisition of airborne gravity data. Fugro has acquired over 150 million kilometers of geophysical data of which 80,000 has been gravity.

The ground gravity dataset was donated by Conoco for use in airborne gravity data evaluation. (Unfortunately, due to contractual obligations, we cannot show the ground gravity data itself.)