Restricted Stacking on Shallow Reflections (Patent No: 891120)

Inventor: Mayne, William H.

Location: San Antonio, TX

Comments: N/A

Description: The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A method of seismic surveying comprising the steps of, locating a series of seismic sources and a series of seismic detectors in spaced relationship to produce a plurality of seismic signal channel path of progressively greater length, the paths from respective cones of said sources passing to corresponding ones of said detectors by way of a common region of a reflective bondary, modifying the seismic signals in each of the channels corresponding to said paths passing through a common reflective region by eliminating from each signal only that initial time portion during which the rate of change of moveout with time exceeds a pre-selected value and combining the modified signals to produce a summation signal.

2. The method defined in Claim 1 including the steps of deriving the rate of change of moveout with time for signals detected for each of said paths passing through a common reflective region, wherein said step of modifying the signals is controlled responsive to a threshold value which corresponds to said maximum pre-selected value of the rate of change of moveout with time.