| 摘要 |
<p>The present invention relates to a method and an apparatus to measure a P-wave section velocity using seismic wave trajectory data which performs slant-track conversion to long offsetting streamer data or wide-angle seismic data obtained through an ocean-bottom seismometer (OBS), and measures a velocity of a section using slant-stack data. The apparatus to measure the P-wave section velocity comprises: a slant-stack converting part extracting the long offsetting data extracted from a reflected P-wave, and performing the slant-stack conversion to the long offsetting data; a selecting part selecting intercept time, a pair of ray parameters, and a one-way vertical delay time from the slant-stack converting part; and a calculating part calculating the ray parameters selected from the selecting part and an arbitrary velocity to obtain a theoretical curve, and calculating a velocity of a point with a minimum error between the data of intercept time and the ray parameters which are selected from the selecting part and the theoretical curve. The slant-stack conversion is performed to the wide-angle seismic data obtained by the OBS, and the section velocity is measured using the slant-stack data; thereby measuring the P-wave section velocity using the seismic wave trajectory data.</p> |
