초록

A method for segregating and stacking vertical seismic profile data is disclosed wherein the offset difference between the well location and the position of the source is divided into equal segments, VSP moveout corrected data are placed in common reflection point bins and stacked.

대표청구항 ▼

A method for segregating and stacking offset vertical seismic profile data obtained from a seismic receiver located in a wellbore into common reflection point bins comprising the steps of: providing curves of constant, moveout corrected two-way reflector travel times from predetermined travel time d

A method for segregating and stacking offset vertical seismic profile data obtained from a seismic receiver located in a wellbore into common reflection point bins comprising the steps of: providing curves of constant, moveout corrected two-way reflector travel times from predetermined travel time data depending on receiver depth and source offset; dividing the offset distance of said shot location to the borehole into a predetermined number of equal common reflection point bins having boundaries; selecting a geophone depth and the corresponding normal incidence two-way travel time to this depth; sectioning two-way reflector travel time defined by the intersection of said common reflection point bin boundaries and said two-way travel time to the geophone depth crossing curves of constant two-way moveout corrected reflector travel times into two-way travel time segments; and stacking said sectioned two-way travel time segments at the centers of said common reflection point bins with weights appropriate to fold.