초록 ▼

Seismic energy is generated at a multiplicity of source offsets from a borehole and offset VSP data is collected by an acoustic detector at a multiplicity of geophone depths for each source offset. The recorded data is sorted into Zero Source-Receiver (ZSR), common reflection point bins. Data from e

Seismic energy is generated at a multiplicity of source offsets from a borehole and offset VSP data is collected by an acoustic detector at a multiplicity of geophone depths for each source offset. The recorded data is sorted into Zero Source-Receiver (ZSR), common reflection point bins. Data from each offset VSP, ZSR common reflection point gather are dynamically moveout corrected with data adaptive parameters including reduced direct arrival times, dip, borehole deviation and stacking velocities. The moveout corrected VSP data are then stacked.

대표청구항 ▼

A method for binning, moveout correcting and stacking vertical seismic profile data for a dipping media comprising the steps of: (a) receiving vertical seismic profile data from an acoustic pulse receiver located in a borehole beneath the earth\s surface and horizontally offset from any acoustic pul

A method for binning, moveout correcting and stacking vertical seismic profile data for a dipping media comprising the steps of: (a) receiving vertical seismic profile data from an acoustic pulse receiver located in a borehole beneath the earth\s surface and horizontally offset from any acoustic pulse generator on the surface causing acoustic pulses reflected from said dipping media to be received by said acoustic pulse receiver or receiving vertical seismic profile data from acoustic pulse receivers located on the earth\s surface horizontally offset from a borehole containing an acoustic pulse generator causing acoustic pulses reflected by said dipping media to be received by said acoustic pulse receivers located on the earth\s surface; (b) selecting zero source-receiver, common reflection point bins for said received vertical seismic profile data according to the following bin range criteria; [Figure] where hs=source-wellhead offset distance on the surface, zG=the depth of the geophone in a borehole, k=geophones 1, 2, . . . , k, and p=shotpoints 1, 2, . . . , p; (c) placing said received vertical seismic profile data in said zero source-receiver common reflection point bins determining a normal incidence two-way reflector time for said dipping media to provide boundaries for the time intervals of said zero source receiver common reflection point bins; (d) moveout correcting said binned vertical seismic profile data; (e) stacking said moveout corrected vertical seismic profile data in said zero source-receiver, common reflection point bins; and (f) displaying said moveout corrected, zero source-receiver binned, vertical seismic profile data.