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
Aqueous composition with agents to inhibit water evaporation
Compact multi-functional scanning apparatus with retractable flatbed scanner
Method to prevent hyper frame number de-synchronization in a wireless communication system
Delay lines, amplifier systems, transconductance compensating systems and methods of compensating
DRAM refresh method and system
Secure data exchange for processing requests
System and method for providing program recommendations through multimedia searching based on established viewer preferences
  Randomly Featured Patents
Color television video signal regenerator, including three video signal regeneration channels, with the input of one channel capable of receiving wider pass-band signals than the other two cha
Multiplexed digital packet telephone system
Thermal recording paper
System and method for pushing data to a mobile device
Flow amplifier
Photoimageable composition
Manually operable door release for vehicles
Protection for the occupants of a vehicle in the event of a side impact
Image forming apparatus and process cartridge
Process of stabilization of anhydrous dibasic calcium phosphate against fluorine ions with 3-amino-1-hydroxypropane-1,1-diphosphonic acid