Resources Contact Us Home
Seismic method of performing the time picking step

Image Number 10 for United States Patent #6868038.

The present invention provides a method of performing the time picking step in a VSP (vertical seismic profile) survey. In a preferred embodiment of the invention the time picking step is carried out on a combined three-component amplitude of the received seismic energy, which contains the amplitude of all the seismic energy received at the receiver. The amplitude of the direct pulse in the combined trace will not decrease to zero as the offset of the source is changed, as can be the case for the single-component amplitude of the direct pulse. In a particularly preferred embodiment of the invention, the combined three-component amplitude is calculated by summing the Hilbert instantaneous amplitudes of the x-, y- and components of the seismic data using the equation (I). The present invention also provides two new time picks. One time pick involves finding the maximum positive gradient of A(t). The other time pick entails extrapolating to A(t)=0 from the time at which A(t) has its greatest positive gradient, using the maximum positive gradient for the extrapolation.

  Recently Added Patents
Vibration power generator and vibration power generation device, and communication device and electronic equipment with vibration power generation device
Multi currency exchanges between participants
Door-activated entry light fixture
Apparatus and method for sterilizing vessel with electron beam
Rotation angle sensor
Transmitting a synchronizing signal in a packet network
Generating a funding and investment strategy associated with an underfunded pension plan
  Randomly Featured Patents
CF card adapter
Method of isolating target specific oligonucleotide ligands
Interactive computer-based information display system
Conduit guide clip
Water-resistant ink jet ink
Non-volatile memory cell structure and process for forming same
Static mixer with profiled layers
Shipping and display container with removable cover and the associated container blank
System and probe for monitoring pH levels of a sample medium
Histidine as a protective agent in cardiac surgery and myocardial ischemic syndrome