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
Portion of display panel or screen with an icon
Piezoelectric speaker and method of manufacturing the same
Method and composition for attracting arthropods by volatizing an acid
Switching element for a valve train of an internal combustion engine
Clamp for fence panels
Automated measurement of concentration and/or amount in a biological sample
Fuel cell system, and electric vehicle equipped with the fuel cell system
  Randomly Featured Patents
Start-up task dispatching for instant messenger applications
Biological system for degrading nitroaromatics in water and soils
Flowmeter for the precision measurement of an ultra-pure material flow
Single step catalytic preparation of para-aminophenol
Adaptation structure and methods for analog continuous time equalizers
Cooling unit and method of cooling an electrophotographic apparatus
Collar attached multiple dog walking bar
Low backlash linear actuator
Transducers for ferroelectric storage medium
Thermal printer