Abstract: Exploration Application of High Resolution Aeromagnetic Surveys in the Gulf Of Mexico, USA

Zeev Berger, Greg Reudavey

High resolution magnetic surveys provide an excellent tool for mapping geological structures in a wide range of tectonic settings and geographical areas. The improved mapping capabilities of these surveys are achieved by: (1) Advanced high resolution data acquisition techniques including lower altitudes, tighter line spacing, and broad-band frequency retention, and (2) advanced data processing and display techniques such as depth slicing, micro-leveling and image processing.

Newly acquired high resolution aeromagnetic surveys of Cameron and Vermilion areas have been recently interpreted. The results of this study can be summarized as follows: (1) The magnetic images of high frequency domain can be used to map near surface salt fastuws and growth faults. These images can also be used to define the shape of the salt diapers and assess their interaction with different fault systems. (2) Interpretation and modeling of different depth-slice images can be used to determine the thickness of different salt bodies and establish their progressive changes with depth. This technique can also be used to outline potential sedimentary basins at different depths. (3) Magnetic images of mid to low frequency domains can be used to establish the structural fabric of sub-sal terrain.

The result of this study is presented with a series of posters that illustrate the inventory of salt and fault features identified on different magnetic images and their correlation with subsurface structures which are recognized with well and seismic data. Magnetic profiles and models are also being used to illustrate how the magnetic data was calibrate to the recorded travel-time of seismic data and related isochron and time structure maps.

AAPG Search and Discovery Article #90951©1996 AAPG International Conference and Exhibition, Caracas, Venezuela