Method and apparatus for processing seismic signals from low energy sources

In a seismic prospecting system having;

• a. a vibratory source driven by a reference sweep signal;
• b. a plurality of geophones at spaced positions distant from said source;
• c. and means to amplify and digitize the geophone signals;
• the method of operation and processing the seismic data, comprising;
• 1. operating said source in C.D.P. format, whereby each source operation is at a different spaced-apart independent position;
• 2. amplifying and digitizing said received signals to form a 1 bit received signal;
• 3. digitizing said reference sweep signal;
• 4. correlating each 1 bit received signal with said digitized reference sweep signal to form multi bit correlograms;
• 5. digitizing said correlograms to 1 bit;
• and
• 6. C.D.P. stacking said 1 bit digitized correlograms;
• and wherein
• 7. the C.D.P. fold is at least 40.

In a seismic prospecting system, having;

• a. a strong seismic source;
• b. a plurality of geophones at spaced positions distant from said source;
• c. and means to amplify and digitize the geophone signals;
• the method of operation and processing the seismic data comprising;
• 1. operating said source in C.D.P. format, whereby each source operation is at a different spaced-apart independent position;
• 2. amplifyng and digitizing the geophone signals to 1 bit;
• 3. C.D.P. stacking said 1 bit digitized signals;
• and wherein
• 4. the C.D.P. fold is at least 40, and
• 5. the number of channels is at least 80.