Borehole Seismic Imaging
A primary challenge with surface seismic is return sufficient energy through the near surface and obtain high frequency data. Without high frequency data the image quality suffers. SIGMA³ offers a new generation of 2D and 3D Borehole Seismic Imaging (BSI) methods that are designed to overcome this challenge by placing long receiver arrays in wells and acquiring data in a similar fashion as traditional VSP technology.
The very distinct difference in our patented approach is that the arrays are much longer, and the processing approach to the data is quick and.... . The method allows true 3D reflection imaging around the well bore with an imaging diameter equal to the depth of the well.
|The Delaware Basin in West Texas is notorious for very poor imaging below the Rustler Salt collapse features that are prevalent in the area. The left panel shows typical surface seismic data, and the right panel shows the 3D BSI data from the same area. Removing the near-surface problem from the upgoing data results in higher frequency and amazingly better image quality from the BSI data.