Research Area 4: Ergodic Geophysical Acquisition

Our original development:  Ergodic geophysical data acquisition with efficiency and high resolution:

• Enhance the resolution by 2 to 10 times
• Reduce the time and cost for data acquisition
• Point-wise ergodic geophysical data acquisition design (MT, DC/IP, seismic, gravity)
• Line-wise ergodic geophysical data acquisition design (airborne magnetic, airborne gravity gravient, seismic streamer)

Field data example showing that ergodic sampling uses fewer samples but acquires similar information: an example when ergodic sampling is applied to a 2D field data set. The lower left panel is a dataset of gravity gradient data defined on the dense grid in panel a. The ergodic sampling in panel (b) uses 25% of samples but acquires the similar information.

This is an ergodic sampling patten in 2D. The ergodic sampling uses fewer samples but maintains the ISA in term of interval, angle, density, and SRF (spectral resolution function).

Figure (b) Seismic structure and attribute

The first field demonstration of the ergodic geophysical survey: The field trial using ergodic survey on 5km * 5km airborne magnetic data acquisition in Australia: Highlights:

1. 1. Blind field test for the ergodic survey
   2. Two independent surveys using full and ergodic on the same area
   3. No special information required for designing the ergodic survey beside the line spacing in the full survey

Get twice the value from the same cost to acquire the data