Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Wireless communication apparatus, a method of wireless communication, and a program for wireless communication
Magnetic resonance imaging apparatus
Beverage container lid
Pixel structure of a solid-state image sensor employing a charge sorting method
Method and system for simulating superimposition of a non-linearly stretchable object upon a base object using representative images
Workflow-enabled client
Disk drive
  Randomly Featured Patents
Interactive home information system for distributing compressed television programming
System and method for two level real-time control for an inserting machine
Multi-purpose elevated bucket
Inertia load dampening hydraulic system
Heart valve prosthesis with improved recess design
System for the transfer of reactive resins components from a remote source to the point of application
Stabilized accelerator composition for rubber
Processes for preparing 1,2-epoxy-1,2,3,4-tetrahydronaphthalenes
Gymnastic pole and mount therefor
Data transmission over a power line communications system