초록 ▼

A method is described that attenuates reverberations in ocean bottom cable data used to generate a seismic profile. First, a seismic wave is generated and recorded by pressure and particle velocity sensor pairs. Adding the product of the pressure data times the absolute value of the velocity data an

A method is described that attenuates reverberations in ocean bottom cable data used to generate a seismic profile. First, a seismic wave is generated and recorded by pressure and particle velocity sensor pairs. Adding the product of the pressure data times the absolute value of the velocity data and the product of the velocity data times the absolute value of the pressure data eliminates reverberations, leaving a combined signal that is a function of only the primary wave response signal. Dividing this combined signal by the number 2 and a sensitivity scaling factor, and then taking the square root of the result produces the magnitude of the primary signal. Replacing the positive/negative sign of the combined signal that existed before taking the absolute value provides the proper polarity. The data are then incorporated into a seismic profile.

대표청구항 ▼

A method of generating a seismic profile using an ocean bottom cable having at least one sensor pair comprising a pressure sensor and a velocity sensor, comprising: generating a seismic wave for reflection from earth strata; collecting pressure data with the pressure sensor and velocity data with th

A method of generating a seismic profile using an ocean bottom cable having at least one sensor pair comprising a pressure sensor and a velocity sensor, comprising: generating a seismic wave for reflection from earth strata; collecting pressure data with the pressure sensor and velocity data with the velocity sensor; multiplying the pressure data with the absolute value of the velocity data to produce a first result; multiplying the velocity data with the absolute value of the pressure data to produce a second result; summing the first result and the second result to create a third result; dividing the third result by a factor of 2 to obtain a fourth result; dividing the fourth result by a sensitivity scaling factor; recording a positive/negative sign for the fourth result; taking the square root of the absolute value of the fourth result to produce a fifth result; replacing the positive/negative sign of the fourth result into the fifth result to produce a sixth result; and incorporating the sixth result into the seismic profile.